HomeMy WebLinkAbout20233500.tiffMEMORANDUM
TO: Board of County Commissioners
DATE: January 8, 2024
FROM: Curtis Hall, Public Works Director
SUBJECT: Ordinance #2023-16, 3rd and Final Reading -
Chapter 8 Code Changes
Public works in collaboration with Planning Services are pleased to present the final proposed
Chapter 8 code changes to the Commissioners. The proposed changes have been intended to
reflect current department practices and operations. The majority of modifications for your
consideration have been minor clean-up edits, except for the addition of a new Article 2 to Chapter
8. This new article is intended to clearly identify the purpose, types, and process for improvements
agreements. Lastly, many appendix edits are focused on Appendix 8-Q, which is the Engineering
and Construction Criteria. This manual helps explain Weld County's engineering design and
construction process in more detail for not only the general public, but developers.
Public Works and Planning Services had a work session with the Board of County Commissioners
(BOCC) on November 13, 2023, to discuss proposed changes. First Reading was approved by
the BOCC on December 4, 2023. On December 20, 2023, the BOCC approved Second Reading
with the understanding that staff would review and consider two comments dated and submitted
December 19, 2023, from AGPROfessionals (AgPro). Staff met with representatives from AgPro
on January 3, 2024, and based on those discussions submitted an amended letter dated January
4, 2024. Staff, therefore, is proposing two amendments to previously presented code changes.
Other than these two amendments, all other changes are minor clean up items. Proposed
amendments:
Amend Sec. 8-12-80. Permit Holder's general responsibilities.
A Permit Holder is responsible for the following items. Additional requirements and more
detailed information are shown in the Special Provisions of the Grading Permit.
Other Permits. The Permit Holder shall secure all permits required by federal, state and
local agencies. Permit Holder may need to provide additional documentation in order
for the County to make a determination if
a grading permit is required.
oZoot3 - 3a1-2)
Amend Sec. 8-14-30. Regulation of access onto County roadways.
D. Emergency Access_ Allowed. Police, fire, ambulance and other emergency providers may
have direct access to County roadways, on a case -by -case basis in the interest of public
safety.. if no other access is permitted. If allowed, the emergency access is not intended
to be used as a primary access accessible to the general public. The emergency access
may be exempt from the minimum spacing criteria and shall be signed as emergency
access only, gated and include a Knox box, or other types of safety improvements. In no
way shall the emergency access be in a location that poses a safety risk or ;eopardize the
public health, safety, and welfare of public and private property.
Staff recommends Board approval of third and final reading with the requested amendments as
shown above.
AGPROfessionals
DEVELOPERS OF AGRICULTURE
January 4, 2024
Weld County Board of Commissioners
1150 O Street
Greeley, CO 80631
RE: ORD2023-16, Third Reading
In the Matter of Repealing and Reenacting, with Amendments, Chapter 8 Public Works of the
Weld County Code
Dear Commissioners,
AGPROfessionals is submitting the below comments in BLUE for the Third Reading of ORD2023-16,
In the Matter of Repealing and Reenacting, with Amendments, Chapter 8 Public Works of the Weld
County Code. Thank you for your consideration.
Grading Permits:
Amend Sec. 8-12-80. Permit Holder's general responsibilities.
A Permit Holder is responsible for the following items. Additional requirements and more detailed
information are shown in the Special Provisions of the Grading Permit.
B. Other Permits. The Permit Holder shall secure permits required by federal, state, and local
agencies. Written documentation from an outside agency stating that the grading activities do
not require an agency permit shall be provided to the County when requested.
It should be sufficient for an applicant to demonstrate that they do not meet the criteria for an
outside agency permit. Requiring written documentation from an outside agency is an undue
burden on the applicant and project timeline. If an applicant is unable to obtain a written - -
response from an outside agency, when an outside agency's involvement is not required in the
first place, there will be unnecessary project delays. This is a current policy that has caused some
frustration in the business community that staff is now recommending be enshrined in the code.
This is an example of regulatory creep.
It is our opinion that item b is adequate as it is, and the additional proposed language creates
more liability for the county. It is the permit holder's responsibility to secure all required permits.
The proposed language places part of the burden of determining all outside agency requirements
on the county, instead of entirely on the permit holder.
ENGINEERING, PLANNING, CONSULTING & REAL ESTATE
HQ & Mailing: 3050 67th Avenue, Suite 200, Greeley, CO 80634 1970-535-9318 office 1970-535-9854 fax
Idaho: 213 Canyon Crest Drive, Suite 100, Twin Falls, ID 83301 1208-595-5301
www.agpros.com
Page 2 of 2
Access:
Amend Sec. 8-14-30. Regulation of access onto County roadways.
D. Emergency Access Allowed. Police, fire, ambulance, and other emergency providers may
have direct access to County roadways, on a case-bv-case basis, Vno other access is permitted.
If allowed, the emergency access shall be gated and include a Knox box, or other types of safety
improvements.
Consider adding exceptions for emergency accesses from the typical spacing, sight distance, and
number of accesses criteria, pursuant to Fire District approval. Most Fire Districts require a
secondary access with minimum spacing criteria from the primary entrance, which is often at
odds with the county's criteria. Emergency accesses are generally gated, not open to the public,
and will only be used if the primary entrance is blocked during an emergency. It would be in the
interest of public safety to allow emergency accesses that meet the Fire District's requirements.
AGPROfessionals met with Public Works staff to discuss ORD2023-16. Our suggested language
resulting from the meeting is included below:
D. Emergency Access Allowed. Police, fire, ambulance, and other emergency providers may
have direct access to County roadways. An emergency access may be permitted subject to
approval of the access location from the fire service provider. Emergency accesses are
exempt from the minimum spacing criteria and Weld County Engineering and construction
Criteria, Appendix Q, pursuant to the following conditions:
• The emergency access shall be constructed in accordance with, fire service provider
requirements.
• The emergency access shall be traversable by emergency vehicles and shall be
constructed so that emergency vehicles may safely enter and exit the property.
• The emergency access shall not be in a location that poses a safety risk and shall not
jeopardize the public health, safety, and welfare of public and private property, as
determined by the fire service provider.
• The emergency access shall be for emergency use only, shall not be accessible to the
general public, and shall have appropriate signage.
• The emergency access shall be gated and include a Knox box, or other types of safety
improvements.
Sincerely,
AGPROfessionals
Tim Naylor, COO
Esther Gesick
From:
Sent:
To:
Cc:
Subject:
Hi Kelsey,
Elizabeth Relford
Thursday, January 4, 2024 10:01 AM
Kelsey Bruxvoort
Curtis Hall; Duane Naibauer; Don Dunker; Dawn Anderson; Mike McRoberts; Torn Parko
Jr; Tim Naylor; Tom Haren; Chad TeVelde; Valene Cauhorn; Austin Kerbs; Hannah
Dutrow; Esther Gesick
RE: BOCC 3rd Reading ORD2023-16 - Chapter 8 Public Works
I really appreciate the opportunity to dialogue and believe this is going to produce a better product for the Board's
consideration. Thank you for providing specific recommendations. They are extremely helpful! I probably won't have a
revised draft to send to you until tomorrow. However, I will do what I can to get it done today.
Sincerely,
Elizabeth Relford
Deputy Director/CDBG Program Manager
Weld County Public Works
1111 H Street
PO Box 758
Greeley, CO 80632-0758
Email: erelford@weld.gov
Office: (970) 400- 3748
Cell: (970) 673-5836
Web: https://www.weld.gov
Confidentiality Notice: This electronic transmission and any attached documents or other writings are intended only for
the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise
protected from disclosure. If you have received this communication in error, please immediately notify sender by return
e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the
contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited.
From: Kelsey Bruxvoort <Kbruxvoort@agpros.com>
Sent: Thursday, January 4, 2024 9:12 AM
To: Elizabeth Relford <erelford@weld.gov>
Cc: Curtis Hall <chall@weld.gov>; Duane Naibauer <dnaibauer@weld.gov>; Don Dunker <ddunker@weld.gov>; Dawn
Anderson <dranderson@weld.gov>; Mike McRoberts <mmcroberts@weld.gov>; Tom Parko Jr <tparko@weld.gov>; Tim
Naylor <tnaylor@agpros.com>; Tom Haren <tharen@agpros.com>; Chad TeVelde <ctevelde@agpros.com>; Valene
Cauhorn <vcauhorn@agpros.com>; Austin Kerbs <akerbs@agpros.com>; Hannah Dutrow <hdutrow@agpros.com>
Subject: BOCC 3rd Reading ORD2023-16 - Chapter 8 Public Works
1
Caution: This email origirated from outside of Weld County Government. Do not click links or open attachments unless you recognize the
sender and know the cont3nt is safe.
Hi Elizabeth,
Thank you for meeting with us yesterday. We appreciate the chance to provide feedback on pending code changes.
Attached is our revised etter to the BOCC for ORD2023-16, which includes suggested language for emergency access
provisions.
I've also sent a copy to the Clerk to the Board.
Let us know if you have any questions/comments. Please also send any draft revisions to Sec. 8-12-80 (Grading Permits)
and 8-14-30 (Access) th3t will be considered by the Board on Monday.
Thank you,
Kelsey Bruxvoort
Land Planner
AGPROfessionals
3050 67th Avenue
Greeley, CO 80634
Office: 970-535-9318
Mobile: 970-744-0068
Fax: 970-535-9854
www.agpros.com
AGPRO
fessionals
DEVELOPERS of AGRICULTURE
Z'o rC h
Awards
JurEthit'd
%%'inner
:MERCURY
MOq MG00
B1ZWeSt
FASTES i•GRQWiNG
PRIVATE COMPANIES
1022 HONOREE
2
MEMORANDUM
TO: Board of County Commissioners
DATE: December 20, 2023
FROM: Elizabeth Relford, PW Deputy Director
SUBJECT: Ordinance #2023-16, 2nd Reading - Chapter 8
Code Changes
Public works and Planning have not received any comments since first reading on December 4th;
therefore, no changes are being presented for second reading. Staff has identified a few typos
still needing to get addressed and will focus on having those corrected for third reading.
The proposed Chapter 8 code changes are intended to reflect current department practices and
o perations. The majority of modifications being requested for your consideration are minor clean-
u p edits, except for the addition of a new Article 2 to Chapter 8. This new chapter is intended to
clearly identify the purpose, types, and process for improvements agreements. Lastly, many
appendix edits are focused on Appendix 8-Q, which is the Engineering and Construction Criteria.
This manual helps explain Weld County's engineering design and construction process in more
detail for not only the general public, but developers.
Following is the summary of changes proposed code changes for first reading:
Article I — Snow and Ice Policy
• Sec. 8-1-20. Snow watch plan. Updates for current practices.
• Sec. 8-1-30. Snow removal priorities.
• Sec. 8-1-40. Contracting for additional resources.
• Sec. 8-1-50. Response plan for extreme snow and ice events. Clarifying the response plan.
• Sec. 8-1-60. No waiver of governmental immunity. Update to refer to state statute.
• Sec. 8-1-70. No expectation of service to any specific person or property. New section per the County
Attorney.
Article II Improvements Agreements
This entire Article is new and is intended to clarify the improvements agreement purpose, types and
process currently used. This Article includes those portions of relocated Chapter 2 language. New
Sections include:
aoa3- 3500
• Sec. 8-2-10. General provisions.
• Sec. 8-2-20. Types of Improvement Agreements
• Sec. 8-2-30. Collateral
• Sec. 8-2-40. Acceptable Types of Collateral
• Sec. 8-2-50. Project Collateral
• Sec. 8-2-60. Release of Project Collateral
• Sec. 8-2-70. Warranty Collateral
• Sec. 8-2-80. Release of Warranty Collateral
• Sec. 8-2-90. Proportional Share Process for Improvements Agreements
ARTICLE III Culverts
• Sec. 8-3-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-3-20. Installation of driveway culvert. Revised to align with current operations.
• Sec. 8-3-30. Culvert Maintenance. Revised to align with current operations.
• Sec. 8-3-40. Maintenance of irrigation structures. Moved from Miscellaneous Article (Sec. 8-6-20)
• Sec. 8-3-50. County Authority. Revised title to align with other code chapters.
ARTICLE IV Use of Borrow or Roadside Ditches
• Sec. 8-4-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-4-20. Responsibilities.
• Sec. 8-4-30. Maintenance. Revised the maintenance section to reflect current operation procedures,
purpose of roadside ditches carrying stormwater, and NELA's for private irrigation structures located
in county road rights of way.
• Sec. 8-4-40. Violations.
ARTICLE V Cattle Guards
• Sec. 8-5-10. Purpose. Modified section to better communicate the purpose of this chapter. This
section was modified from the title Definitions to Purpose.
• Sec. 8-5-20. New Installations/Relocations. Modified to reflect current department operations.
• Sec. 8-5-30. Cleaning Maintenance. Deleting Cleaning and renaming this section to Maintenance.
Modifying this section to reflect current department operations.
• Sec. 8-5-40. Replacement. Deleted and relocated to Section 8-5-20.
• Sec. 8-5-50. Notification of Repair Need. Deleted this section and incorporated in Section 8-5-20.
• Sec. 8-5-60. Agreement for repair. Deleted this section.
• Sec. 8-5-70. Vested right. Renumbered to Section 8-5-40.
ARTICLE VI Miscellaneous Provisions
• Sec. 8-6-10. Gravel pits. Updated to reflect current process.
• Sec. 8-6-20. Deleted Miscellaneous of irrigation structures. Moved to culvert Section.
• Sec. 8-6-30. Deleted Permits for road and bridge operations. Moved to Gravel pits Section (8-6-10).
• Sec. 8-6-40. Reserved
• Sec. 8-6-50. Reserved
• Sec. 8-6-60. Sign Policy. Deleted Sign Policy and relocated to new Article VII Signs and Pavement
Markings.
• Sec. 8-6-70. Grader Sheds. Being renamed to Satellite Facilities.
• Sec. 8-6-80. Satellite Facilities utilities and rents. Updated to reflect current operations.
• Sec. 8-6-90. County expenditures for roads within municipal boundaries. No change.
• Sec. 8-6-100. Gravel road fugitive particulate emissions policy and procedure. Updated to also reflect
maintenance of detour routes during construction.
• Sec. 8-6-110. Survey monuments. Minor clean-up edits.
• Sec. 8-6-120. Weed control. No changes.
• Sec. 8-6-130. Trees in rights -of -way. No changes.
• Sec. 8-6-140. Deleted and relocated to new Article VII Signs and Pavement Markings.
• Sec. 8-6-150. Road maintenance acceptance policy for public roads. Revised to make the process more
transparent.
• Sec. 8-6-155. Road maintenance policy for private roads, lanes, or driveways. No change.
• Sec. 8-6-160. Repealed. No change.
• Sec. 8-6-170. Obstructions within county rights -of -way. Minor updates to clarify breakaway structures.
• Sec. 8-6-180. Memorial Signs. Deleted and relocated to new Article VII Signs and Pavement Markings.
ARTICLE VII Signs and Pavement Markings
While this is a new Article, many of the policies were previously identified in Article VI Miscellaneous
Provisions and have been relocated to its own Article for tracking and transparency.
• Sec. 8-7-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-7-20. Sign Policy Modified to reflect current operations. (Previously 8-6-60).
• Sec. 8-7-30. Memorial signs. Modified to reflect current operations ((Previously 8-6-180).
• Sec. 8-7-40. Pavement Markings. Combination of previous policy in 8-6-60 and a new section to reflect
current operations.
ARTICLE VIII Transportation Planning
• Sec. 8-8-10. General. New section to help explain the purpose of transportation planning.
• Sec. 8-8-20. Purpose. Renumber sections and created a new Purpose section.
• Sec. 8-8-30. Weld County Transportation Plan and Functional Classification Map. Revised section to
align with State Statutes recognition of primary and secondary road systems. This modification also
aligns with the HUTF resolution annually adopted by the Board.
• Sec. 8-8-40. Adoption of Chapter IV, Transportation Element of Northern Colorado Regional
Communities I-25 Corridor Plan. Deleted this section and thought about moving to a new section but
recommend deleting this entire section (Previously Sec. 8-8-20).
ARTICLE IX — Municipal Separate Storm Sewer System
This Chapter was last amended in 2019 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-9-10. Title
• Sec. 8-9-20. Authorization
• Sec. 8-9-30. Purpose/Intent
• Sec. 8-9-40. Applicability.
• Sec. 8-9-50. Definitions. Added a few new definitions: construction dewatering permit, construction
stormwater permit, and development area.
• Sec. 8-9-60. Responsibility for administration.
• Sec. 8-9-70. Illicit discharges.
• Sec. 8-9-80. Pre -construction.
• Sec. 8-9-90. Construction activity. Modifications to inspection process to align with current operations.
• Sec. 8-9-100. Post construction. Modifications to align with current processes.
• Sec. 8-9-110. CDPS permitted discharges.
• Sec. 8-9-120. Access to premises.
• Sec. 8-9-130. Enforcement procedures. Minor edits clarifying the process.
• Sec. 8-9-140. Collection of costs.
• Sec. 8-9-150. Enforcement and penalties for unabated violations.
• Sec. 8-9-160. Remedies not exclusive.
• Sec. 8-9-170. Severability.
bi l ity.
ARTICLE X Reserved
ARTICLE XI Storm Drainage Criteria
This Chapter was last amended in 2019 and minor updates are recommended to reflect current
department operations. Simple housekeeping items include updating any reference from Urban
Drainage to Mile High Flood District and ensuring this Article is aligned with the drainage process
identified in Chapter 5 of Appendix 8-Q. Also, in this chapter we delete reference to "Public Works" and
replace it with "Weld County, or just County" since the employees representing this article are now
located in a different department and they still enforce it on behalf of the Public Works Department.
• Sec. 8-11-10. Intent.
• Sec. 8-11-20. Definitions.
• Sec. 8-11-30. Adoption of storm drainage standards.
• Sec. 8-11-40. Drainage policy.
• Sec. 8-11-45. Exceptions
• Sec. 8-11-50. Rainfall.
• Sec. 8-11-60. Runoff.
• Sec. 8-11-70. Street drainage for use by special review, commercial, industrial, planned unit
development and residential subdivisions.
• Sec. 8-11-80. Major drainage.
• Sec. 8-11-90. Culverts in public right-of-way.
• Sec. 8-11-100. Storage.
• Sec. 8-11-110. Revegetation.
• Sec. 8-11-120. Stormwater quality.
• Sec. 8-11-130. Control measures.
• Sec. 8-11-140. Maintenance.
• Sec. 8-11-150. Enforcement.
• Sec. 8-11-160. Stormwater drainage criteria variances.
ARTICLE XII Grading Permit Policy
This Article contains minor edits to reflect current department operations. The biggest housekeeping
effort in this chapter is to delete reference to "Public Works" and replace it with "Weld County" since
the employees represented by this article are now located in a different department, they still enforce it
on behalf of the Public Works Department.
• Sec. 8-12-10. General.
• Sec. 8-12-20. Purpose.
• Sec. 8-12-30. Grading Permit.
• Sec. 8-12-40. Definitions.
• Sec. 8-12-50. Grading Permit application.
• Sec. 8-12-60. Application review, Grading Permit issuance, permit expiration and permit extension.
• Sec. 8-12-70. Reserved.
• Sec. 8-12-80. Permit Holder's general responsibilities.
• Sec. 8-12-90. Inspections.
• Sec. 8-12-100. Administrative fee.
• Sec. 8-12-110. Appeal of denial of Grading Permit.
• Sec. 8-12-120. Failure to comply with terms of grading permit.
• Sec. 8-12-130. Permit suspension or revocation.
• Sec. 8-12-140. Penalties.
ARTICLE XIII Right of Way Use Permit Policy
This Chapter was last amended in 2018 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-13-10. General.
• Sec. 8-13-20. Purpose.
• Sec. 8-13-30. Regulation of work in county right-of-way.
• Sec. 8-13-40. Definitions.
• Sec. 8-13-50. Right-of-way use permit application.
• Sec. 8-13-60. Application review, right-of-way use permit issuance, permit expiration and permit
extension.
• Sec. 8-13-70. County authority.
• Sec. 8-13-80. Permittee's general responsibilities.
• Sec. 8-13-90. Inspections.
• Sec. 8-13-100. Administrative fee.
• Sec. 8-13-110. Appeal of denial of right of way use permit.
• Sec. 8-13-120. Failure to comply.
• Sec. 8-13-130. Permit suspension or revocation.
• Sec. 8-13-140. Enforcement.
ARTICLE XIV Road Access Policy
While this Chapter was last amended in 2019, there are many updates being recommended for this
Article.
• Sec. 8-14-10. Intent of road access policy
• Sec. 8-14-20. Purpose and Intent.
• Sec. 8-14-30. Regulation of access onto County roadways.
• Sec. 8-14-40. Access permit application process.
• Sec. 8-14-50. Permit holder's general responsibilities.
• Sec. 8-14-60. Variance from specific access permit requirements.
• Sec. 8-14-70. Appeal of denial of access permit.
• Sec. 8-14-80. Enforcement.
• Sec. 8-14-90. County authority.
• Sec. 8-14-100. Access Control Plans (ACP's), and additional techniques and requirements for access on
County roads.
ARTICLE XV Transport Permits
This Chapter was last amended in 2019 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-15-10. Intent of Transport Permit Policy.
• Sec. 8-15-20. Purpose.
• Sec. 8-15-30. Definitions.
• Sec. 8-15-40. General provisions.
• Sec. 8-15-50. Transport permits types.
• Sec. 8-15-60. Transport permits application information.
• Sec. 8-15-70. Transport permit application process.
• Sec. 8-15-80. Applicant's general responsibilities.
• Sec. 8-15-90. County authority.
• Sec. 8-15-100. Transport permit fee.
• Sec. 8-15-110. Appeal of denial of Grading Permit.
• Sec. 8-15-120. Appeal of denial of a transport permit.
• Sec. 8-15-130. Permit suspension or revocation.
• Sec. 8-15-140. Enforcement.
ARTICLE XVI Vacation of Right of Way by BOCC
No changes proposed for this Article.
• Sec. 8-16-10. Purpose and Intent.
• Sec. 8-16-20. Vacation procedures.
• Sec. 8-16-30. Vacations of public road rights of way not within historic townsites or subdivisions.
• Sec. 8-16-40 — Requirements.
• Sec. 8-16-40. General provisions.
• Sec. 8-16-50. Transport permits types.
APPENDIX 8-A - RESERVED (NO CHANGE)
APPENDIX 8-B - DELETED ROAD ACCESS SKETCHES AND RESERVED
APPENDIX 8-C - REVISED CATTLE GUARD FORM
APPENDIX 8-D - DELETED DUST CONTROL AND SEASONAL ADJUSTMENT FACTOR AND RESERVED
APPENDIX 8-E - DELETED WELD COUNTY MS4 MAP AREA
APPENDIX 8-F - 8J - RESERVED (NO CHANGE)
APPENDIX 8-K - DELETED NORTHERN COLORADO AND 125 CORRIDOR PLAN REGIONAL COMMUNITIES
AND RESERVED
APPENDIX 8-L - MEMORIAL SIGN APPLICATION REVISED
APPENDIX 8-M - MEMORIAL SIGN DIMENSIONS (NO CHANGE)
APPENDIX 8-N - 2045 TRANSPORTATION PLAN PDF LINK (NO CHANGE)
APPENDIX 8-0 - FUNCTIONAL CLASSIFICATION MAP PDF LINK (NO CHANGE)
APPENDIX 8-P - RIGHT OF WAY PERMIT APPLICATION (NO CHANGE)
APPENDIX 8-Q- ENGINEERING AND CONSTRUCTION CRITIERIA (SEE APPENDIX 8-Q SUMMARY)
Here are the proposed changes to Appendix 8-Q, Engineering and Construction Criteria:
Chapter 1- General Provisions
Sec. 1.4: Reference Documents
• Add reference to Weld County Special Provisions
Sec. 1.7: Improvements Agreements
• Update Title to "Improvements Agreements" to match Chapter 8, Article II of the Weld County
Code.
• Reference new Article II of Chapter 8 in the Weld County Code.
• Include the equation for the ESAL method in this section of the criteria manual.
Chapter 2 — Road Classifications and Typical Sections
Sec. 2.1.2: Urban and Rural Classifications — Change to Primary vs Secondary.
Sec. 2.6: Typical Cross -Sections
• Table 2-1: Typical Cross Sections Summary (Rural) — Added two Nonmaintained Local Residential
categories, Unpaved with Recycled Asphalt Pavement (RAP) and Unpaved Gravel, both with 30'
right-of-way.
Chapter 3 — Surveying
Sec. 3.2: State Plane
• Replace recommended with required for the survey control to be tied into a National Geodetic
Survey (NGS) monument for state plane conversion.
Chapter 4 — Roadway Design Criteria
Sec. 4.1.2: Typical Plan Set Guidelines
• Add the requirements for Surface Utility Engineering (SUE) and requirements of what shall be
shown on the utility sheets.
• Grading and Erosion Control Sheet(s) — clean up language.
• Stormwater Management Plan — replace conditions with control measures to match industry
standards.
Sec. 4.2.1: Horizontal Curves
• Correct decrease to increase.
Sec. 4.6: Cul-de-Sacs
• Increase the minimum outside curb or pavement edge radius allowed for a cul-de-sac from 50
feet to 55 feet.
Sec. 4.7.5: Bridge Railing
• Include language that Weld County follows CDOT M&S standards for bridge rail and guardrail
design.
Chapter 5 — Drainage Criteria
Sec. 5.1: General
• Update website location from the Public Works Development Review page to the Planning and
Zoning Development Review page.
Sec. 5.2.1: General Principals of Colorado Drainage Law Applicable to Weld County
• Delete
Sec. 5.3.1: Submittal Requirements
• Include/update clarifying language.
Sec. 5.5.1: The Rational Method
• Table 5-2, Percentage Impervious Values for Weld County: Solar Facilities, C&D Soils — change
from 25% impervious to site specific. This will allow the engineers discretion in more rural areas.
Sec. 5.10: Storage
• Add language to direct people to Weld County spreadsheets for storage capacity for design
assistance.
Sec. 5.10.2: Detention
• Remove the word percentage from the first paragraph.
Sec. 5.10.2.7: Exceptions to Detention Requirements
• Update to match proposed changes in Chapter 8, Article XI of the Weld County Code.
Sec. 5.11: Stormwater Drainage Criteria Variances
• Update language from the applicant is able to apply, to may apply for a variance.
• Update language from Weld County will not approve design variances "seen" to be detrimental
to the public health, safety, and general welfare to "found" to be detrimental...
Chapter 6 — Erosion Control and MS4 Requirements
*Change the Title of the Chapter to Grading and MS4 Requirements
Sec. 6.1: Erosion Control Requirements —> Change to Erosion Control & Grading Requirements
• Add that Weld County requires an erosion control and grading plan.
• Add that at a minimum, a stormwater management plan (SWMP) shall include erosion control
and grading plans.
Sec. 6.1.1: Applicability
• Update to clarify the requirements that a grading permit may be required in an MS4 area for any
disturbance.
Sec. 6.1.2: Grading and Erosion Control Plans
• Add the requirement for a Drainage Plan to be submitted with a grading permit application.
• Site drainage — correct language to site grading.
• Clarify plan sheets for all three phases.
• Final Phase — replace "uniform" with permanent.
• Replace "digitally" with electronically.
Sec. 6.1.3: Implementation
• Add that a Drainage Plan will also be required to be kept onsite during construction.
Sec. 6.1.4: Add Section — Grading Permit Deadline (Fee) & Extension
Sec. 6.2.1: Designated MS4 Areas and Responsibilities
• Add that MS4 mapped areas are reviewed annually by Weld County and are designated by CDPHE.
• Add that the MS4 permit requires a Post -Construction Program to treat stormwater runoff from
applicable development sites.
Sec. 6.2.2: Applicability of MS4 Requirements
• Delete first paragraph.
• Delete subsection titles 6.2.2.1 - Areas of Disturbance and 6.2.2.2 - Construction Activity as
information fits under the main section title of Applicability of MS4 Requirements.
• Add a description of how planned disturbance is evaluated for subdivisions.
Sec. 6.2.4: MS4 Requitements for Pre -Construction
• Remove the reference to the July 1, 2019, date.
Sec. 6.2.4.2: Drainage Report
• Change language from "shall" to may require a survey.
• Change language from the survey and report "will be submitted" to may be required to be
submitted.
Sec. 6.2.4.4: MS4 Pollution Prevention Plan
• Clarify that the MS4 Pollution Prevention Plan Checklist and Manual is available in Appendix H.
• Define what the manual contains.
• Include language that covers what the checklist and manual were developed for.
• Delete final paragraph.
Sec. 6.2.5.1: Stormwater Inspections
• Update the methods in which an applicant can be notified of a violation. The method will depend
on the severity of the violation.
• Add that a "schedule for compliance" needs to be followed and what happens if it's not.
• Clarify that if a violation is not corrected one of the remedies would be to hold all permits for the
site until compliance is met.
• Remove sentence that indicator (drive -by) inspections may occur less frequently if it passes
indicator inspection.
• Remove the requirement that the CDPS Construction Stormwater Permit must be terminated as
part of the criteria to know when 90 -day inspections can end.
Sec. 6.2.5.2: Construction Enforcement
• Update the way remaining violations are communicated. Remove the reference to an inspection
report and add that the inspector will notify the owner/operator.
• For violations not corrected by the follow-up compliance inspection, remove the references that
an NOV is written and that it will be sent via certified mail. Also remove that an additional
compliance inspection will be scheduled.
• Add that if violations detailed in the NOV are not corrected then additional NOV's may be issued,
in combination with additional enforcement actions, such as Stop Work Orders and placing holds
on permits.
• Add that if compliance is not being achieved through previous methods, then the Department of
Public Works may decide to pursue other enforcement options.
Sec. 6.2.6.1: Exemptions
• Update what exemptions, with descriptions, are allowed within an MS4 area per the county's MS4
permit. There are three exemptions: Large -Lot Single Family Sites (with criteria), Undeveloped
Land, and Above Ground and Underground Utilities (with criteria).
Sec. 6.2.6.2: Permanent Water Quality Control Measure Design
• #2 — Runoff Reduction Standard — Update that the Runoff Reduction Standard is most commonly
used for sites qualifying for an exception to detention or sites draining to a detention pond "which
was not originally" designed to mee the WQCV Standard.
Sec. 6.2.6.3: Certificate of Occupancy
• Add the sentence — For redevelopment sites or sites in violation, and 'MS4 hold' will be placed on
the parcel, under which no permits will be issued until MS4 requirements are met.
Sec. 6.2.6.4: Release from Grading Permit
• Replace "uniform vegetative cover permanent stabilization" with permanent vegetative cover.
• Update last sentence to read that Grading Permits may be subject to a permit renewal fee instead
of that they are subject.
Sec. 6.2.6.5: Long -Term Inspections of Permanent Water Quality Control Measures
• Update language from "will be submitted" to may be required.
Sec. 6.2.6.6: Enforcement
• Remove "for record keeping purposes".
• Add that if corrective actions are not made within the specified amount of time, then an 'MS4
hold' will be placed on the parcel.
• Add that a hearing may be scheduled, not "will".
Sec. 6.2.7: MS4 Requirements for As -Built Drawing Checklist
• Add that the As -Built checklist is located in Appendix D.
• Clarify "site" drainage with examples, remove "features".
• Add description of As-Builts.
Chapter 7 — FEMA Floodplain Requirements
*Update to match the recently approved/adopted changes to Chapter 23, Article XI of the Weld County
Code.
Chapter 8 — Traffic Criteria
Sec. 8.1.3: Traffic Impact Study Requirements
• Sec. 8.1.3.10.e, Crash History — Add language that a third party software, such as DiExSys, may be
required to provide the proper safety crash data for analysis for potential improvements. Also,
add the levels that are accepted by Weld County Public Works.
Sec. 8.4: Traffic Control Devices and Plans
• Add/clarify that the "most current edition" of the MUTCD must be followed.
Sec. 8.5: Access Points
• Add "application".
• Add "Intersection" with access spacing.
• Correct the criteria for measuring from "right-of-way to right-of-way" to centerline to centerline.
Sec. 8.6.1: Geometric Design
• Table 8-3, Add "at ROW" in the Column titled Maximum Access Width.
Sec. 8.7: Auxiliary Turn Lanes
• Figure 8-5 — Update to include the Taper Length in the Deceleration Length (Figure 8-6 is correct
as the Taper Length is shown in the Acceleration Length).
Sec. 8.9: Tracking Control
• Add the sentence — Tracking control is required when construction activity is accessing onto a
roadway surface other than gravel.
• Replace "situations" with options.
• Add language that drainage and/or culverts are to be maintained during install of tracking control.
• Add recycled asphalt (RAP) for road surfaces.
• Add option c. under the gravel public road surface that states: Aggregate surface course (See
Section 9.6.6) on all drive surfaces.
• Add recycled asphalt (RAP) to the temporary access road types. Also add that culverts and/or an
accepted drainage report may be required for temporary access control pads and that the County
must accept any prefabricated tracking pad.
Chapter 9 — Soil Investigation and Pavement Design
Sec. 9.3.5: Hveem Stahilometer
• Add the suggestion to perform the hydrometer testing for all applicable soil of interest since the
percent silt and clay content in soil are identified as important independent variables. (This helps
attain better results.)
Sec. 9.6.3: Hot Mix Asphalt
• For the mix design of the top mat or wear course, remove "100% virgin aggregates" and replace
with a maximum of 20% RAP.
Sec. 9.6.5: Aggregate Base Course
• Add crushed angular manufactured aggregate to Class 6.
• Add the angularity of aggregate criteria.
• Add that Recycled Concrete Product (RCP) aggregate base course is not used as shouldering
material or an exposed layer. Add that the RCP will be covered by a subsequent layer.
Sec. 9.6.6: Aggregate Surface Course (Gravel)
• Add a new #1 and re -number: 1. Los Angeles abrasion, AASHTO T96 - 40%
• New #4: Liquid Limit, AASHTO T89 — change from 35 max to 30 max
Chapter 10 — Construction Criteria
Sec. 10.1.1: Policy on the Use of Referenced Publications
• Add references to the Weld County Special Project Revisions.
Sec. 10.1.3: Project Acceptance and Warranty
• Add that an inspection will be performed prior to final acceptance.
Sec. 10.2.1: Qualifications, Insurance Requirements, and Licensing
• Add reference to the Weld County Special Project Revisions.
• Remove last sentence as it is repetitive with language above.
Sec. 10.2.2: Pre -Construction Meetings
• Replace "may" with shall. Weld County requires a pre -construction meeting.
Sec. 10.4.2: Unsuitable Materials
• Change the testing data when soils are tested by a Hveem Stabilometer to the following:
minimum R -value of at least "R-10" to R-20 and maximum dry density of not less than "90" to 120
pounds per cubic foot.
Sec. 10.5.2: Soft Spots
• Add geogrid as an option.
Sec. 10.6.1: Gradation and Moisture and Density Control
• Add sentence: Shouldering materials shall not contain crushed or recycled concrete materials.
Sec. 10.7.1: Pre -Paving Meetings
• Change the quantities of asphalt and concrete pavement that will trigger the need for a
mandatory pre -paving meeting to the following: Asphalt (HMA) pavement from "50" tons to
more than 500 tons and for Concrete pavement from 2,000 CY to 2,000 SY.
Sec. 10.7.4: Concrete (PCCP) Surfaces
• #2, Change the thickness criteria from "11" inches to 9 inches.
• #3, Update type from "TX -160" to INTERAX NX650. Also add equivalent for potential other
options that meet or exceed the criteria.
• #10, Add minimum of to the strength criteria of 650 psi.
• Add new #14 and re -number. #14, All epoxy coated Tie Bars used in concrete pavement jointing
will have no bare steel ends and require coating of epoxy paint prior to placement.
• Update and add CDOT criteria to Table 10-1, Pavement Marking Types on Concrete.
Sec. 10.8.3: Curbs, Gutters, and Cross pans
• Add sentence: All gutters and cross pans shall be 8" thick minimum.
Chapter 11 -Permitting
*Only general clean-up items proposed in this chapter of Appendix 8-Q.
Chapter 12 — Variance Requests
• Add reference to Section 8-11-160 of the Weld County Code for information on Drainage
variances.
• Add detailed clarity to the hardship criteria in the first bullet point of #3 of justifications for a
variance.
• Replace "will" with shall.
• Clarify that the Public Works Director or their designee only be able to approve the variance if the
applicant has demonstrated the required justification.
DEVELOPERS OF AGRICULTURE
III
AGPROfessionals
December 19, 2023
Weld County Board of Commissioners
1150 O Street
Greeley, CO 80631
RECEIVED
DEC 19 2023
WELD COUNTY
COMMISSIONERS
RE: ORD2023-16, Second Reading
In the Matter of Repealing and Reenacting, with Amendments, Chapter 8 Public Works of
the Weld County Code
Dear Commissioners,
AGPROfessionals is submitting the below comments in BLUE for the Second Hearing of
ORD2023-16, In the Matter of Repealing and Reenacting, with Amendments, Chapter 8 Public
Works of the Weld County Code. Thank you for your consideration.
Grading Permits:
Amend Sec. 8-12-80. Permit Holder's general responsibilities.
A Permit Holder is responsible for the following items. Additional requirements and more
detailed information are shown in the Special Provisions of the Grading Permit.
B. Other Permits. The Permit Holder shall secure permits required by federal, state, and
local agencies. Written documentation from an outside agency stating that the grading
activities do not require an agency permit shall be provided to the County when
requested.
It should be sufficient for an applicant to demonstrate that they do not meet the criteria
for an outside agency permit. Requiring written documentation from an outside agency is
an undue burden on the applicant and project timeline. If an applicant is unable to obtain
a written response front an outside agency, when an outside agency's involvement is not
required in the first place, there will be unnecessary project delays. This is a cunrent
policy that has caused some frustration in the business community that staff is now
recommending he enshrined in the code. This is an example of regulatory creep.
ENGINEERING, PLANNING, CONSULTING & REAL ESTATE
HQ & Mailing: 3050 67. Avenue, Suite 200, Greeley, CO 806341970-535-9318 office 1970-535-9854 fax
Idaho: 213 Canyon Crest Drive, Suite 100, Twin Falls, ID 83301 1208-595-5301
www.at pros.corn
Page 2 of 2
Access:
Amend Sec. 8-14-30. Regulation of access onto County roadways.
D. Emergency Access Allowed. Polic, fire, ambulance, and other emergency providers
may have direct access to County roadways, on a case -by -case basis, if no other access is
permitted. Ifallowed, the emergency access shall be gated and include a Knox box, or
other types of 'safety improvements.
Consider adding exceptions for emergency accesses from the typical spacing, sight
distance, and number of accesses criteria, pursuant to Fire District approval. Most Fire
Districts require a secondary access with minimum spacing criteria from the primary
entrance, ss'hich is often at odds with the county's criteria. Emergency accesses are
generally gated, not open to the public, and will only be used if the primary entrance is
blocked during an emergency. It would be in the interest of public safety to allow
emergency accesses that meet the Fire District's requirements.
Sincerely,
` AGPROfessionals
Tim Naylor, COO
MEMORANDUM
TO: Board of County Commissioners
DATE: December 4, 2023
FROM: Elizabeth Relford, PW Deputy Director
SUBJECT: Ordinance #2023-16, 1St Reading - Chapter 8
Code Changes
Public works in collaboration with Development Review are pleased to present Chapter 8 code
changes to the Commissioners. The proposed changes are intended to reflect current department
practices and operations. The majority of modifications being requested for your consideration
are minor clean-up edits, except for the addition of a new Article 2 to Chapter 8. This new chapter
is intended to clearly identify the purpose, types, and process for improvements agreements.
Lastly, many appendix edits are focused on Appendix 8-Q, which is the Engineering and
Construction Criteria. This manual helps explain Weld County's engineering design and
construction process in more detail for not only the general public, but developers.
Following is the summary of changes proposed code changes for first reading:
Article I — Snow and Ice Policy
• Sec. 8-1-20. Snow watch plan. Updates for current practices.
• Sec. 8-1-30. Snow removal priorities.
• Sec. 8-1-40. Contracting for additional resources.
• Sec. 8-1-50. Response plan for extreme snow and ice events. Clarifying the response plan.
• Sec. 8-1-60. No waiver of governmental immunity. Update to refer to state statute.
• Sec. 8-1-70. No expectation of service to any specific person or property. New section per the County
Attorney.
Article II Improvements Agreements
This entire Article is new and is intended to clarify the improvements agreement purpose, types and
process currently used. This Article includes those portions of relocated Chapter 2 language. New
Sections include:
• Sec. 8-2-10. General provisions.
• Sec. 8-2-20. Types of Improvement Agreements
• Sec. 8-2-30. Collateral
• Sec. 8-2-40. Acceptable Types of Collateral
• Sec. 8-2-50. Project Collateral
• Sec. 8-2-60. Release of Project Collateral
• Sec. 8-2-70. Warranty Collateral
• Sec. 8-2-80. Release of Warranty Collateral
• Sec. 8-2-90, Proportional Share Process for Improvements Agreements
ARTICLE III Culverts
• Sec. 8-3-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-3-20. Installation of driveway culvert. Revised to align with current operations.
• Sec. 8-3-30. Culvert Maintenance. Revised to align with current operations.
• Sec. 8-3-40. Maintenance of irrigation structures. Moved from Miscellaneous Article (Sec. 8-6-20)
• Sec. 8-3-50. County Authority. Revised title to align with other code chapters.
ARTICLE IV Use of Borrow or Roadside Ditches
• Sec. 8-4-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-4-20. Responsibilities.
• Sec. 8-4-30. Maintenance. Revised the maintenance section to reflect current operation procedures,
purpose of roadside ditches carrying stormwater, and NELA's for private irrigation structures located
in county road rights of way.
• Sec. 8-4-40. Violations.
ARTICLE V Cattle Guards
• Sec. 8-5-10. Purpose. Modified section to better communicate the purpose of this chapter. This
section was modified from the title Definitions to Purpose.
• Sec. 8-5-20. New Installations/Relocations. Modified to reflect current department operations.
• Sec. 8-5-30. Cleaning Maintenance. Deleting Cleaning and renaming this section to Maintenance.
Modifying this section to reflect current department operations.
• Sec. 8-5-40. Replacement. Deleted and relocated to Section 8-5-20.
• Sec. 8-5-50. Notification of Repair Need. Deleted this section and incorporated in Section 8-5-20.
• Sec. 8-5-60. Agreement for repair. Deleted this section.
• Sec. 8-5-70. Vested right. Renumbered to Section 8-5-40.
ARTICLE VI Miscellaneous Provisions
• Sec. 8-6-10. Gravel pits. Updated to reflect current process.
• Sec. 8-6-20. Deleted Miscellaneous of irrigation structures. Moved to culvert Section.
• Sec. 8-6-30. Deleted Permits for road and bridge operations. Moved to Gravel pits Section (8-6-10).
• Sec. 8-6-40. Reserved
• Sec. 8-6-50. Reserved
• Sec. 8-6-60. Sign Policy. Deleted Sign Policy and relocated to new Article VII Signs and Pavement
Markings.
• Sec. 8-6-70. Grader Sheds. Being renamed to Satellite Facilities.
• Sec. 8-6-80. Satellite Facilities utilities and rents. Updated to reflect current operations.
• Sec. 8-6-90. County expenditures for roads within municipal boundaries. No change.
• Sec. 8-6-100. Gravel road fugitive particulate emissions policy and procedure. Updated to also reflect
maintenance of detour routes during construction.
• Sec. 8-6-110. Survey monuments. Minor clean-up edits.
• Sec. 8-6-120. Weed control. No changes.
• Sec. 8-6-130. Trees in rights -of -way. No changes.
• Sec. 8-6-140. Deleted and relocated to new Article VII Signs and Pavement Markings.
• Sec. 8-6-150. Road maintenance acceptance policy for public roads. Revised to make the process more
transparent.
• Sec. 8-6-155. Road maintenance policy for private roads, lanes, or driveways. No change.
• Sec. 8-6-160. Repealed. No change.
• Sec. 8-6-170. Obstructions within county rights -of -way. Minor updates to clarify breakaway structures.
• Sec. 8-6-180. Memorial Signs. Deleted and relocated to new Article VII Signs and Pavement Markings.
ARTICLE VII Signs and Pavement Markings
While this is a new Article, many of the policies were previously identified in Article VI Miscellaneous
Provisions and have been relocated to its own Article for tracking and transparency.
• Sec. 8-7-10. Purpose. New section clarifying the purpose of this chapter.
• Sec. 8-7-20. Sign Policy Modified to reflect current operations. (Previously 8-6-60).
• Sec. 8-7-30. Memorial signs. Modified to reflect current operations ((Previously 8-6-180).
• Sec. 8-7-40. Pavement Markings. Combination of previous policy in 8-6-60 and a new section to reflect
current operations.
ARTICLE VIII Transportation Planning
• Sec. 8-8-10. General. New section to help explain the purpose of transportation planning.
• Sec. 8-8-20. Purpose. Renumber sections and created a new Purpose section.
• Sec. 8-8-30. Weld County Transportation Plan and Functional Classification Map. Revised section to
align with State Statutes recognition of primary and secondary road systems. This modification also
aligns with the HUTF resolution annually adopted by the Board.
• Sec. 8-8-40. Adoption of Chapter IV, Transportation Element of Northern Colorado Regional
Communities 1-25 Corridor Plan. Deleted this section and thought about moving to a new section but
recommend deleting this entire section (Previously Sec. 8-8-20).
ARTICLE IX — Municipal Separate Storm Sewer System
This Chapter was last amended in 2019 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-9-10. Title
• Sec. 8-9-20. Authorization
• Sec. 8-9-30. Purpose/Intent
• Sec. 8-9-40. Applicability.
• Sec. 8-9-50. Definitions. Added a few new definitions: construction dewatering permit, construction
stormwater permit, and development area.
• Sec. 8-9-60. Responsibility for administration.
• Sec. 8-9-70. Illicit discharges.
• Sec. 8-9-80. Pre -construction.
• Sec. 8-9-90. Construction activity. Modifications to inspection process to align with current operations.
• Sec. 8-9-100. Post construction. Modifications to align with current processes.
• Sec. 8-9-110. CDPS permitted discharges.
• Sec. 8-9-120. Access to premises.
• Sec. 8-9-130. Enforcement procedures. Minor edits clarifying the process.
• Sec. 8-9-140. Collection of costs.
• Sec. 8-9-150. Enforcement and penalties for unabated violations.
• Sec. 8-9-160. Remedies not exclusive.
• Sec. 8-9-170. Severability.
b i l ity.
ARTICLE X Reserved
ARTICLE XI Storm Drainage Criteria
This Chapter was last amended in 2019 and minor updates are recommended to reflect current
department operations. Simple housekeeping items include updating any reference from Urban
Drainage to Mile High Flood District and ensuring this Article is aligned with the drainage process
identified in Chapter 5 of Appendix 8-Q. Also, in this chapter we delete reference to "Public Works" and
replace it with "Weld County, or just County" since the employees representing this article are now
located in a different department and they still enforce it on behalf of the Public Works Department.
• Sec. 8-11-10. Intent.
• Sec. 8-11-20. Definitions.
• Sec. 8-11-30. Adoption of storm drainage standards.
• Sec. 8-11-40. Drainage policy.
• Sec. 8-11-45. Exceptions
• Sec. 8-11-50. Rainfall.
• Sec. 8-11-60. Runoff.
• Sec. 8-11-70. Street drainage for use by special review, commercial, industrial, planned unit
development and residential subdivisions.
• Sec. 8-11-80. Major drainage.
• Sec. 8-11-90. Culverts in public right-of-way.
• Sec. 8-11-100. Storage.
• Sec. 8-11-110. Revegetation.
• Sec. 8-11-120. Stormwater quality.
• Sec. 8-11-130. Control measures.
• Sec. 8-11-140. Maintenance.
• Sec. 8-11-150. Enforcement.
• Sec. 8-11-160. Stormwater drainage criteria variances.
ARTICLE XII Grading Permit Policy
This Article contains minor edits to reflect current department operations. The biggest housekeeping
effort in this chapter is to delete reference to "Public Works" and replace it with "Weld County" since
the employees represented by this article are now located in a different department, they still enforce it
on behalf of the Public Works Department.
• Sec. 8-12-10. General.
• Sec. 8-12-20. Purpose.
• Sec. 8-12-30. Grading Permit.
• Sec. 8-12-40. Definitions.
• Sec. 8-12-50. Grading Permit application.
• Sec. 8-12-60. Application review, Grading Permit issuance, permit expiration and permit extension.
• Sec. 8-12-70. Reserved.
• Sec. 8-12-80. Permit Holder's general responsibilities.
• Sec. 8-12-90. Inspections.
• Sec. 8-12-100. Administrative fee.
• Sec. 8-12-110. Appeal of denial of Grading Permit.
• Sec. 8-12-120. Failure to comply with terms of grading permit.
• Sec. 8-12-130. Permit suspension or revocation.
• Sec. 8-12-140. Penalties.
ARTICLE XIII Right of Way Use Permit Policy
This Chapter was last amended in 2018 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-13-10. General.
• Sec. 8-13-20. Purpose.
• Sec. 8-13-30. Regulation of work in county right-of-way.
• Sec. 8-13-40. Definitions.
• Sec. 8-13-50. Right-of-way use permit application.
• Sec. 8-13-60. Application review, right-of-way use permit issuance, permit expiration and permit
extension.
• Sec. 8-13-70. County authority.
• Sec. 8-13-80. Permittee's general responsibilities.
• Sec. 8-13-90. Inspections.
• Sec. 8-13-100. Administrative fee.
• Sec. 8-13-110. Appeal of denial of right of way use permit.
• Sec. 8-13-120. Failure to comply.
• Sec. 8-13-130. Permit suspension or revocation.
• Sec. 8-13-140. Enforcement.
ARTICLE XIV Road Access Policy
While this Chapter was last amended in 2019, there are many updates being recommended for this
Article.
• Sec. 8-14-10. Intent of road access policy
• Sec. 8-14-20. Purpose and Intent.
• Sec. 8-14-30. Regulation of access onto County roadways.
• Sec. 8-14-40. Access permit application process.
• Sec. 8-14-50. Permit holder's general responsibilities.
• Sec. 8-14-60. Variance from specific access permit requirements.
• Sec. 8-14-70. Appeal of denial of access permit.
• Sec. 8-14-80. Enforcement.
• Sec. 8-14-90. County authority.
• Sec. 8-14-100. Access Control Plans (ACP's), and additional techniques and requirements for access on
County roads.
ARTICLE XV Transport Permits
This Chapter was last amended in 2019 and functions well. There are only minor updates
recommended for this Article.
• Sec. 8-15-10. Intent of Transport Permit Policy.
• Sec. 8-15-20. Purpose.
• Sec. 8-15-30. Definitions.
• Sec. 8-15-40. General provisions.
• Sec. 8-15-50. Transport permits types.
• Sec. 8-15-60. Transport permits application information.
• Sec. 8-15-70. Transport permit application process.
• Sec. 8-15-80. Applicant's general responsibilities.
• Sec. 8-15-90. County authority.
• Sec. 8-15-100. Transport permit fee.
• Sec. 8-15-110. Appeal of denial of Grading Permit.
• Sec. 8-15-120. Appeal of denial of a transport permit.
• Sec. 8-15-130. Permit suspension or revocation.
• Sec. 8-15-140. Enforcement.
ARTICLE XVI Vacation of Right of Way by BOCC
No changes proposed for this Article.
• Sec. 8-16-10. Purpose and Intent.
• Sec. 8-16-20. Vacation procedures.
• Sec. 8-16-30. Vacations of public road rights of way not within historic townsites or subdivisions.
• Sec. 8-16-40 — Requirements.
• Sec. 8-16-40. General provisions.
• Sec. 8-16-50. Transport permits types.
APPENDIX 8-A - RESERVED (NO CHANGE)
APPENDIX 8-B - DELETED ROAD ACCESS SKETCHES AND RESERVED
APPENDIX 8-C - REVISED CATTLE GUARD FORM
APPENDIX 8-D - DELETED DUST CONTROL AND SEASONAL ADJUSTMENT FACTOR AND RESERVED
APPENDIX 8-E - DELETED WELD COUNTY MS4 MAP AREA
APPENDIX 8-F - 8J - RESERVED (NO CHANGE)
APPENDIX 8-K - DELETED NORTHERN COLORADO AND 125 CORRIDOR PLAN REGIONAL COMMUNITIES
AND RESERVED
APPENDIX 8-L - MEMORIAL SIGN APPLICATION REVISED
APPENDIX 8-M - MEMORIAL SIGN DIMENSIONS (NO CHANGE)
APPENDIX 8-N - 2045 TRANSPORTATION PLAN PDF LINK (NO CHANGE)
APPENDIX 8-O - FUNCTIONAL CLASSIFICATION MAP PDF LINK (NO CHANGE)
APPENDIX 8-P - RIGHT OF WAY PERMIT APPLICATION (NO CHANGE)
APPENDIX 8-Q - ENGINEERING AND CONSTRUCTION CRITIERIA (SEE APPENDIX 8-Q SUMMARY)
Here are the proposed changes to Appendix 8-Q, Engineering and Construction Criteria:
Chapter 1— General Provisions
Sec. 1.4: Reference Documents
• Add reference to Weld County Special Provisions
Sec. 1.7: Improvements Agreements
• Update Title to "Improvements Agreements" to match Chapter 8, Article II of the Weld County
Code.
• Reference new Article II of Chapter 8 in the Weld County Code.
• Include the equation for the ESAL method in this section of the criteria manual.
Chapter 2 — Road Classifications and Typical Sections
Sec. 2.1.2: Urban and Rural Classifications — Change to Primary vs Secondary.
Sec 2 6 Typical Cross -Sections
• Table 2-1 Typical Cross Sections Summary (Rural) — Added two Nonmaintained Local Residential
categories, Unpaved with Recycled Asphalt Pavement (RAP) and Unpaved Gravel, both with 30'
right-of-way
Chapter 3 — Surveying
Sec 3 2 State Plane
• Replace recommended with required for the survey control to be tied into a National Geodetic
Survey (NGS) monument for state plane conversion
Chapter 4 — Roadway Design Criteria
Sec 4 1 2 Typical Plan Set Guidelines
Add the requirements for Surface Utility Engineering (SUE) and requirements of what shall be
shown on the utility sheets
Grading and Erosion Control Sheet(s) — clean up language
Stormwater Management Plan — replace conditions with control measures to match industry
standards
Sec 4 2 1 Horizontal Curves
• Correct decrease to increase
Sec 4 6 Cul-de-Sacs
• Increase the minimum outside curb or pavement edge radius allowed for a cul-de-sac from 50
feet to 55 feet
Sec 4 7 5 Bridge Railing
• Include language that Weld County follows CDOT M&S standards for bridge rail and guardrail
design
Chapter 5 — Drainage Criteria
Sec 51 General
• Update website location from the Public Works Development Review page to the Planning and
Zoning Development Review page
Sec 5 2 1 General Principals of Colorado Drainage Law Applicable to Weld County
• Delete
Sec 5 3 1 Submittal Requirements
• Include/update clarifying language
Sec 5 5 1 The Rational Method
• Table 5-2, Percentage Impervious Values for Weld County Solar Facilities, C&D Soils — change
from 25% impervious to site specific This will allow the engineers discretion in more rural areas
Sec 5 10 Storage
• Add language to direct people to Weld County spreadsheets for storage capacity for design
assistance
Sec 5 10 2 Detention
• Remove the word percentage from the first paragraph
Sec 5 10 2 7 Exceptions to Detention Requirements
• Update to match proposed changes in Chapter 8, Article XI of the Weld County Code
Sec 5 11 Stormwater Drainage Criteria Variances
• Update language from the applicant is able to apply, to may apply for a variance
• Update language from Weld County will not approve design variances "seen" to be detrimental
to the public health, safety, and general welfare to "found" to be detrimental
Chapter 6 — Erosion Control and MS4 Requirements
*Change the Title of the Chapter to Grading and MS4 Requirements
Sec 6 1 Erosion Control Requirements —v Change to Erosion Control & Grading Requirements
• Add that Weld County requires an erosion control and grading plan
• Add that at a minimum, a stormwater management plan (SWMP) shall include erosion control
and grading plans
Sec 611 Applicability
• Update to clarify the requirements that a grading permit may be required in an MS4 area for any
disturbance
Sec 6 1 2 Grading and Erosion Control Plans
• Add the requirement for a Drainage Plan to be submitted with a grading permit application
• Site drainage — correct language to site grading
• Clarify plan sheets for all three phases
• Final Phase — replace "uniform" with permanent
• Replace "digitally" with electronically
Sec 6 1 3 Implementation
• Add that a Drainage Plan will also be required to be kept onsite during construction
Sec 6 1 4 Add Section — Grading Permit Deadline (Fee) & Extension
Sec 6 2 1 Designated MS4 Areas and Responsibilities
• Add that MS4 mapped areas are reviewed annually by Weld County and are designated by CDPHE
• Add that the MS4 permit requires a Post -Construction Program to treat stormwater runoff from
applicable development sites
Sec 6 2 2 Applicability of MS4 Requirements
• Delete first paragraph
• Delete subsection titles 6 2 2 1 — Areas of Disturbance and 6 2 2 2 — Construction Activity as
information fits under the main section title of Applicability of MS4 Requirements
• Add a description of how planned disturbance is evaluated for subdivisions
Sec 6 2 4 MS4 Requitements for Pre -Construction
• Remove the reference to the July 1, 2019, date
Sec 6 2 4 2 Drainage Report
• Change language from "shall" to may require a survey
• Change language from the survey and report "will be submitted" to may be required to be
submitted
Sec 6 2 4 4 MS4 Pollution Prevention Plan
• Clarify that the MS4 Pollution Prevention Plan Checklist and Manual is available in Appendix H
• Define what the manual contains
• Include language that covers what the checklist and manual were developed for
• Delete final paragraph
Sec 6 2 5 1 Stormwater Inspections
Update the methods in which an applicant can be notified of a violation The method will depend
on the severity of the violation
Add that a "schedule for compliance" needs to be followed and what happens if it's not
Clarify that if a violation is not corrected one of the remedies would be to hold all permits for the
site until compliance is met
Remove sentence that indicator (drive -by) inspections may occur less frequently if it passes
indicator inspection
Remove the requirement that the CDPS Construction Stormwater Permit must be terminated as
part of the criteria to know when 90 -day inspections can end
Sec 6 2 5 2 Construction Enforcement
Update the way remaining violations are communicated Remove the reference to an inspection
report and add that the inspector will notify the owner/operator
For violations not corrected by the follow-up compliance inspection, remove the references that
an NOV is written and that it will be sent via certified mail Also remove that an additional
compliance inspection will be scheduled
Add that if violations detailed in the NOV are not corrected then additional NOV's may be issued,
in combination with additional enforcement actions, such as Stop Work Orders and placing holds
on permits
Add that if compliance is not being achieved through previous methods, then the Department of
Public Works may decide to pursue other enforcement options
Sec 6 2 6 1 Exemptions
• Update what exemptions, with descriptions, are allowed within an MS4 area per the county's MS4
permit There are three exemptions Large -Lot Single Family Sites (with criteria), Undeveloped
Land, and Above Ground and Underground Utilities (with criteria)
Sec 6 2 6 2 Permanent Water Quality Control Measure Design
• #2 — Runoff Reduction Standard — Update that the Runoff Reduction Standard is most commonly
used for sites qualifying for an exception to detention or sites draining to a detention pond "which
was not originally" designed to mee the WQCV Standard
Sec 6 2 6 3 Certificate of Occupancy
• Add the sentence — For redevelopment sites or sites in violation, and 'MS4 hold' will be placed on
the parcel, under which no permits will be issued until MS4 requirements are met
Sec 6 2 6 4 Release from Grading Permit
• Replace "uniform vegetative cover permanent stabilization" with permanent vegetative cover
• Update last sentence to read that Grading Permits may be subject to a permit renewal fee instead
of that they are subject
Sec 6 2 6 5 Long -Term Inspections of Permanent Water Quality Control Measures
• Update language from "will be submitted" to may be required
Sec 6 2 6 6 Enforcement
• Remove "for recordkeeping purposes"
• Add that if corrective actions are not made within the specified amount of time, then an 'MS4
hold' will be placed on the parcel
• Add that a hearing may be scheduled, not "will"
Sec 6 2 7 MS4 Requirements for As -Built Drawing Checklist
• Add that the As -Built checklist is located in Appendix D
• Clarify "site" drainage with examples, remove "features"
• Add description of As-Builts
Chapter 7 — FEMA Floodplain Requirements
*Update to match the recently approved/adopted changes to Chapter 23, Article XI of the Weld County
Code
Chapter 8 — Traffic Criteria
Sec 8 1 3 Traffic Impact Study Requirements
• Sec 8 1 3 10 e, Crash History —Add language that a third party software, such as DiExSys, may be
required to provide the proper safety crash data for analysis for potential improvements Also,
add the levels that are accepted by Weld County Public Works
Sec 8 4 Traffic Control Devices and Plans
• Add/clarify that the "most current edition" of the MUTCD must be followed
Sec 8 5 Access Points
• Add "application"
• Add "Intersection" with access spacing
• Correct the criteria for measuring from "right-of-way to right-of-way" to centerline to centerline
Sec 8 6 1 Geometric Design
• Table 8-3, Add "at ROW" in the Column titled Maximum Access Width
Sec 8 7 Auxiliary Turn Lanes
• Figure 8-5 — Update to include the Taper Length in the Deceleration Length (Figure 8-6 is correct
as the Taper Length is shown in the Acceleration Length)
Sec 8 9 Tracking Control
Add the sentence — Tracking control is required when construction activity is accessing onto a
roadway surface other than gravel
Replace "situations" with options
Add language that drainage and/or culverts are to be maintained during install of tracking control
Add recycled asphalt (RAP) for road surfaces
Add option c under the gravel public road surface that states Aggregate surface course (See
Section 9 6 6) on all drive surfaces
Add recycled asphalt (RAP) to the temporary access road types Also add that culverts and/or an
accepted drainage report may be required for temporary access control pads and that the County
must accept any prefabricated tracking pad
Chapter 9 — Soil Investigation and Pavement Design
Sec 9 3 5 Hveem Stahilometer
• Add the suggestion to perform the hydrometer testing for all applicable soil of interest since the
percent silt and clay content in soil are identified as important independent variables (This helps
attain better results )
Sec 9 6 3 Hot Mix Asphalt
• For the mix design of the top mat or wear course, remove "100% virgin aggregates" and replace
with a maximum of 20% RAP
Sec 9 6 5 Aggregate Base Course
• Add crushed angular manufactured aggregate to Class 6
m Add the angularity of aggregate criteria
• Add that Recycled Concrete Product (RCP) aggregate base course is not used as shouldering
material or an exposed layer Add that the RCP will be covered by a subsequent layer
Sec 9 6 6 Aggregate Surface Course (Gravel)
• Add a new #1 and re -number 1 Los Angeles abrasion, AASHTO T96 - 40%
• New #4 Liquid Limit, AASHTO T89 — change from 35 max to 30 max
Chapter 10 — Construction Criteria
Sec 10 1 1 Policy on the Use of Referenced Publications
• Add references to the Weld County Special Project Revisions
Sec 10 1 3 Project Acceptance and Warranty
• Add that an inspection will be performed prior to final acceptance
Sec 10 2 1 Qualifications, Insurance Requirements, and Licensing
• Add reference to the Weld County Special Project Revisions
• Remove last sentence as it is repetitive with language above
Sec 10 2 2 Pre -Construction Meetings
• Replace "may" with shall Weld County requires a pre -construction meeting
Sec 10 4 2 Unsuitable Materials
• Change the testing data when soils are tested by a Hveem Stabilometer to the following
minimum R -value of at least "R-10" to R-20 and maximum dry density of not less than "90" to 120
pounds per cubic foot
Sec 10 5 2 Soft Spots
• Add geogrid as an option
Sec 10 6 1 Gradation and Moisture and Density Control
• Add sentence Shouldering materials shall not contain crushed or recycled concrete materials
Sec 10 7 1 Pre -Paving Meetings
• Change the quantities of asphalt and concrete pavement that will trigger the need for a
mandatory pre -paving meeting to the following Asphalt (HMA) pavement from "50" tons to
more than 500 tons and for Concrete pavement from 2,000 CY to 2,000 Si'
Sec 10 7 4 Concrete (PCCP) Surfaces
#2, Change the thickness criteria from "11" inches to 9 inches
#3, Update type from "TX -160" to INTERAX NX650 Also add equivalent for potential other
options that meet or exceed the criteria
#10, Add minimum of to the strength criteria of 650 psi
Add new #14 and re -number #14, All epoxy coated Tie Bars used in concrete pavement jointing
will have no bare steel ends and require coating of epoxy paint prior to placement
Update and add CDOT criteria to Table 10-1, Pavement Marking Types on Concrete
Sec 10 8 3 Curbs, Gutters, and Cross pans
• Add sentence All gutters and cross pans shall be 8" thick minimum
Chapter 11 -Permitting
*Only general clean-up items proposed in this chapter of Appendix 8-Q
Chapter 12 — Variance Requests
Add reference to Section 8-11-160 of the Weld County Code for information on Drainage
variances
Add detailed clarity to the hardship criteria in the first bullet point of #3 of justifications for a
variance
Replace "will" with shall
Clarify that the Public Works Director or their designee only be able to approve the variance if the
applicant has demonstrated the required justification
Weld County, Colorado, Charter and County Code
CHAPTER 8 Public Works
CHAPTER 8
Public Works
ARTICLE I Snow and Ice Policy
Sec. 8-1-10. Purpose.
A. The principal objective of the Weld County Public Works Snow and Ice Control Program is to provide for the
safe and efficient flow of traffic within the County during periods of inclement winter weather. Routes have
been established and priorities assigned which shall ensure that the minimum road network required for
operation of emergency vehicles shall be maintained at all times. Under all circumstances, emergency agencies
and command elements of County government shall be notified.
B. Flexibility remains the cornerstone of the plan. To be effective, priorities must be reassessed periodically, and
routes altered to keep pace with changing population centers and traffic volumes.
C. Within this policy are sections which pertain to a "Snow Emergency." These sections shall supersede any other
conflicting sections.
(Weld County Code Ordinance 2011-11)
Sec. 8-1-20. Snow watch plan.
A. During normal working hours, sanding and/or plowing operations may be initiated by the Director of Public
Works or the Operational Divisionon-duty Snow Boss.
B In order to ensure that sanding/plowing operations are initiated in a timely manner at other than normal
working hours, feedback regarding road conditions by Sheriff's Office Deputies and any other agency, including
the Colorado State Patrol, shall be sent to the Weld County Regional Communications Center (WCRCC). The
WCRCC shall then notify the scheduled on -duty Snow Boss. The Snow Boss shall then initiate sanding/plowing
operations accordinglyas per reports.
(Weld County Code Ordinance 2011-11 ; Weld County Code Ordinance 2020-03 )
Sec. 8-1-30. Snow removal priorities.
A. Priorities: Roads -shall be geared inClearing of roads shall occur according to the following order of priority:
1. Emergencies involving human life and safety.
2. National Defense (Air Force Missile Site access roads).
3. Essential dairy and livestock access roads.
4. Main arterial roads.
5. School bus routes.
6. Mail delivery routes.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created:
2023-3500
Page 1 of 140
7. Remaining eCollector roads unincorporated towns}.
8. Local roads, including subdivisions and unincorporated towns.
B Communications Command and control.
1. Command and control shall be exercised through the following chain of authority:
a. Board of County Commissioners.
b. Director of Public Works.
c. Snow Boss.
2. Control of operations shall be exercised at the Public Works Department Operations Center (PWDOC).
Communications with regional supervisorsbetween Snow Boss and operators shall be according to the
following methodsorder of priority: 1) County Radio System; 2) cell phone; 3) CB radio. The Director of
Public Works shall be in charge of snow removal operations and shall staff the PWDOC as necessary to
carry out operations efficiently. This authority shall be delegated to the assigned Snow Bosses.
3 Any emergency calls for emergency services the Sheriff's Office, ambulance or helicopter services
received at the PWDOC shall be forwarded to the appropriate agency.
4. All incoming calls regarding snow removal or emergencies shall be routed to the PWDOC (970-304 6496}
from dispatch or in-house Public Works staffunless a specific person is requested.
C. Operations.
1. The PWDOC shall be staffed as soon as determined necessary by the Director of Public Works, the Snow
Boss or the Commissioners. The Snow Boss shall assume charge immediately by initiating recall, making
contact with all units in the field and determining their status, and shall direct operations in accordance
with the priorities established herein. If additional resources are needed, the Director of Public Works
may contract for additional resources in accordance with the provisions of Section 8-1-40 of this Code.
2 If weather information indicates that operations are anticipated in advance of the approaching storm,
the Director of Public Works shall direct specific operators to be at work and ready to commence
o perations as soon as practical. If more than two (2) days of continuous operations are anticipated, no
o perator shall work more than twelve (12) hours in a day without approval of the Director of Public
Works.
3 Status of all snow removal operations shall be maintained at the PWDOC. Reports shall be made to the
Public Works Emergency Notification Group intermittently throughout the snow event. These reports
shall be directed by the Director of Public Works or applicableon-duty Snow Boss.
4. Plow operators are directed that the first priority is to get roads cleared as fast and safe as possible,
e mergencies excepted. Operators are authorized and directed to stop and assist disabled vehicles only
if it is necessary to clear the road or if life or health is in danger. Requests for assistance from stranded
vehicles, not involving an emergency, shall be radioed in to the PWDOC, who shall attempt to obtain
assistance for the stranded party. The request for assistance shall be forwarded to the Regional
Communications Center for action, such as a request for towing services.
5. If an abandoned vehicle is blocking the roadway, the operator shall radio in the location, license plate
n umber and description of the vehicle to the PWDOC. The PWDOC shall contact the Regional
Communications Center, informing the Dispatcher that a hazard exists, and the vehicle should be
removed from the County road right-of-way. Dispatch shall contact the Weld County Sheriffs Office for
appropriate action.
6 No school property or private roads or driveways off the County rights -of -way shall be cleared by County
equipment, with the following exceptions:
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 2 of 140
a. If requested in writing, by a school district; and approved in advance by
the Board of County Commissioners. the County shall clear the entry.
b If a citizen needs a private road or driveway opened for a medical or other emergency, the citizen
should call Emergency Services (911). Emergency Services will then contact the PWDOC. The
PWDOC will then contact the appropriate operator who shall meet the emergency vehicle at the
site and open the road or driveway for the emergency vehicle.
7 Plow trucks shall primarily be used to remove snow and ice on paved roads and have shall be designated
assigned routes or zones but may be assigned otherwise as neededas dictated by the snow distribution
within the County.
8 Backup supportRepair and maintenance of all Public Works equipment shall be furnished by the Weld
County Department of Fleet Services during a snow event. and all Public Works divisions to maintain and
Personnel from these -divisions shall be on standby or on duty, as
directed by the Director of Public Works and the Director of Fleet Services.
9 Nothing in this plan is intended to preclude an employee from acting and using his or her best judgment
in the absence of direction from a higher authority.
D Planning and preparation.
1. All supervisors of units providing snow removal are responsible for ensuring that equipment is ready.
and personnel are briefed on their duties. Prior to the first a snow event, each piece of equipment shall
be inspected with its plow and spreader to ensure readiness. All other equipment, such as tire and tow
chains, route maps and vehicle lights, shall also be inspected at this time.
2. Fuel stocks at outlying grader stations Ssatellite facilities shall be monitored by the individual zone
operators immediately prior to a snow event and status reported to the Director of Fleet Services. If a
fuel delivery is necessary during a snow event, the Snow Boss may direct that the delivery route be
cleared on a priority basis.
(Weld County Code Ordinance 2011-11 ; Weld County Code Ordinance 2020-03 )
Sec. 8-1-40. Contracting for additional resources.
In cases of EXTREME EMERGENCY and where County resources cannot maintain safe traveling conditions, it
may be necessary to obtain additional equipment from Contractors.
A. Authorization for contract.
1. Upon the recommendation of the Director of Public Works and approval by the Board of County
Commissioners or its authorized representative, the Director of Public Works shall contact
available contractors and obtain the necessary contractor equipment and personnel to augment
the County workforce.
2 The Director of Public Works or authorized agent of the Board of County Commissioners shall
follow our the emergency procurement process in Chapter 5 of the Weld County Code. negotiate
a fair and equitable equipment rate with the contractors, but in no case shall it exceed the
maximum rates set by the most recent edition of the Colorado Department of Transportation,
Equipment Rental Rate Schedule.
B. Contracted equipment Ccommand and control. Control of contractor equipment shall be exercised through
the PWDOC. The Director of Public Works or the on -duty Snow Boss shall coordinate and control the efforts of
all contractor equipment.
C. Operations.
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 3 of 140
1 County and contracted workforces shall be employed so as to maximize the efficiency of the snow
removal operation. Contracted equipment may be paired with County equipment to take advantage of
County radio control.
2. As soon as it is apparent that County forces can handlemanage resources for the remaining snow
event removal on a timely basis, the Director of Public Works shall terminate contractor
operations.
3. The Director of Public Works shall ensure that accurate records are kept on all contractor time and
equipment in order to validate invoices submitted for payment. If a contractor required fuel from
County supplies, the Director of Public Works shall ensure that proper accounting procedures are
followed.
4. Contractors shall submit invoices to the Department of Public Works for validation ofto receive
payment for time and costscharges.
(Weld County Code Ordinance 2011-11; Weld County Code Ordinance 2020-03)
Sec. 8-1-50. Response plan for extreme snow and ice events.
The following policy sets in place criteria for managing snow and ice removal efforts on the County roadway
network during extreme weather events.
A. Weather event definition ,. Snow events are categorized using a storm level scale based on reports from
the field as to the severity of conditions, as well as other methods, including forecasts, satellite images,
weather stations and common sense. With the vast expanse of Weld County, storm levels may vary
depending on conditions in that area. The levels of storms are defined below:
1. Level 1: Extreme weather conditions. Snow removal efforts shall cease, and equipment shall
retreat to designated recovery stations located throughout the County for further instructions and
redeployment as conditions warrant. Level 1 may be declared by the on -duty Snow Boss with the
concurrence of the Director of Public Works, the Commissioner Coordinator or Alternate
Commissioner Coordinator for Public Works. When redeployed, resources shall be committed to
predetermined priority snow routes. Notification of a Level 1 Condition or any road closures shall
be communicated to the Regional Communications Center and the Public Works Emergency
Notification List.
Level 3: Snow Removal Operations shah focu-s on all roads. The effort and resou-rces expended shall vary
depencing on accumu ation anc crifting conditions. T
le on duty Snow Boss
s
refer to direction
provided in prior sections of this Code.
2 Level 2: Snow Removal Operations shall focus on pred-eterm+ned priority snow routesremoval
priorities as identified in Section 8-1-30'A). Some roads may be closed, and traffic rerouted so snow
removal vehicles can operate unimpeded by traffic. The on -duty Snow Boss shall refer to direction
provided in prior sectionsSection 8-1-30 of this Code.
3. Level 3: Snow Removal Operations shall focus on all roads. The effort and resources expended shall
vary depending on accumulation and drifting conditions. The on -duty Snow Boss shall refer to
direction provided in prior sections Section 8-1-30 of this Code.
warrant. Level 1 may be declared by the on d-u-ty Snow Boss with the concurrence of the Director
of 7ub ic Works, :le Commissioner Coorcina:or or A :erna:e Commissioner Coorcina :or 'or tub ic
Works. When redeployed, resou-rces shall be committed to predetermined priority snow routes.
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 4 of 140
Notification of a Level 1 Condition or any road closures shall be communicated to the Regional
Sec. 8-1-60. No waiver of governmental immunity.
No term or condition set forth in this Article shall be construed or interpreted as a waiver, express or implied,
of any of the immunities, rights, benefits, protections, or other provisions of the Colorado Governmental Immunity
Act, Section 24-10-101, et seq., C.R.S., as applicable. Furthermore, nothing set forth in this Article shall be construed
as creating a duty of care upon any individual or party.
Sec. 8-1-70. No expectation of service to any specific person or property.
The provisions stated in this Article are not intended to, nor shall they, create in any specific person or
property a right to expect a certain level of service, even if such level of service is described herein:
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 5 of 140
CHAPTER 8 - Public Works
ARTICLE II Reserved
ARTICLE II Reserved Improvements Agreements
Depending on the land USE pro ect, there are several different types of possible Improvements Agreements that
may be required. It is the intent that Improvements Agreements will be in place prior to final approval of the USE.
Construction of any safety improvements are intended to be completed prior to operation or issuance of building
permit s'.
A. An Improvements Agreement reference may be used interchangeably and include but is not limited to
immediate off -site and/or on -site improvements, future triggered improvements, and road maintenance
criteria. All categories may or may not include a proportional share based on locations and existing
background traffic.)
B. Agreement Types include:
1. Improvements Agreement (IA). This agreement is for pro ects that include future triggered
improvements. Typically includes a standard road maintenance section for items such dust
suppressant or pavement damage repair. If applicable, will include a proportional share
component for any future improvements done by the County on the haul or travel route.
2. Offsite Improvements Agreement jOFFSIA). These agreements include immediate off -site
improvements. Immediate safety improvements may include but are not limited to, adding
auxiliary lanes, intersection improvements, paving of gravel road, or widening of a road. These
agreements will require project and warranty collateral and will also include all components
described in the improvements' agreements.
3. On -Site Improvements Agreement (ONSIA). These agreements require immediate on -site
improvements intended for public use but privately maintained, which may include but are not
limited to, dedication of rights -of -way for public use, construction of an internal roadway, and/or
construction of irrigation or stormwater ponds.
Road Maintenance Agreement (RMA). A Road Maintenance Agreement includes items addressing
routine road maintenance, including but not limited to, dust suppressant if on a gravel road and
pavement damage repair if on a paved road. There will also be a proportional share component
for typical road maintenance improvements performed by the County specifically identified to the
haul and travel routes related to the project.
5. Road Maintenance During Construction JRMCA). These agreements are similar to the Road
Maintenance Agreement but are limited in time. Often used for transmissions lines, solar energy
facilities and other land USE projects where the heavy traffic impact on the roads is limited to the
construction of the facility/USE. These agreements will still include a proportional share
component for routine road maintenance improvements performed by the County on the haul
and travel routes related to the project. Pre and post construction inspections are required for
these agreements.
Sec. 8-2-30. Collateral
A. Improvements Agreements requiring collateral as financial assurance that the obligations of the
Agreement will be completed (including, but not limited to, Subdivision and Development
Improvements Agreements for major and minor subdivisions and Development Improvements
Agreements for Planned Unit Developments) shall generally conform to this Article II.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 6 of 140
CHAPTER 8 - Public Works
ARTICLE II Reserved
B. The County requires applicants to provide acceptable collateral to guarantee all of their obligations
under the associated Improvements Agreement in the following forms: (1) Pro.ect Collateral for
completion of all improvements described in the Improvements Agreement; and :2) Warranty
Collateral to ensure all public improvements uphold their functionality during the warranty period.
C. All references to "Acceptance of Improvements" shall refer to the County confirming completion of
the improvements according to the accepted Construction Plans. By accepting any improvement, the
County does not thereby accept it for purposes of future maintenance, nor does the County accept
any present or future responsibilities or obligations relative to the improvements.
D. The Board of County Commissioners reserves the right to reject collateral that it deems inappropriate
or insufficient.
E. Release of collateral is the sole discretion of the Board.
Sec. 8-2-40. Acceptable types of collateral.
The three (3) types of collateral listed below are acceptable to the County:
A. An irrevocable letter of credit from a federal- or state -licensed financial institution that has at least a
three -star rating given by Bauer Financial consistent with a sample form supplied by the County. The
Board may require the applicant to obtain replacement collateral if the rating of the financial
institution providing the collateral drops below this level, which shall be submitted within sixty ;60;
days of the Board's notice to the applicant that the rating has fallen and that the collateral must be
replaced. The applicant may not terminate existing collateral until replacement collateral has been
secured.
1. The letter of credit shall provide for payment upon demand to the County if the applicant has
not performed the obligations specified in the Improvements Agreement and the issuer has
been notified of such default or if, after the County has received notice that the letter will not
be renewed as set forth below, the County notifies the issuer that the applicant has not provided
adequate replacement collateral and the County intends to demand payment, regardless of
whether applicant is then in default.
2. The issuer of the letter of credit shall guarantee that, at all times, the unreleased portion of the
letter of credit shall be available to the County for the purpose of completing the uncompleted
improvements enumerated in the Improvements Agreement.
3. The letter of credit must stipulate that it will automatically renew and shall remain in full force
and effect until released by action of the Board, or until after the Board has received a minimum
of sixty :60) days' written notice from the issuer of the letter of credit of the pending expiration.
The notice shall be sent by certified mail to the Clerk to the Board.
B. A surety bond given by a corporate surety authorized to do business in the State and having at least
a B+ rating given by A.M. Best. The Board may require the applicant to obtain replacement collateral
if the rating of the financial institution providing the collateral drops below this level, which shall be
submitted within sixty :60) days of the Board's notice to the applicant that the rating has fallen and
that the collateral must be replaced. The applicant may not terminate existing collateral until
replacement collateral has been secured.
Weld County, Colorado, Charter and County Code
(Su pp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 7 of 140
CHAPTER 8 - Public Works
ARTICLE II Reserved
C. A cash deposit made with the Board.
Sec. 8-2-50. Project Collateral.
A. The value of Protect Collateral submitted to the County must be equivalent to one hundred twenty-
five percent :125%) of the value of the improvements identified on the accepted Construction Cost
Estimate exhibit to the Improvements Agreement.
B. The Project Collateral shall be submitted with a signed Improvements Agreement including all
required exhibits. The complete submittal is subtect to final approval by the Board and shall be
recorded at the Office of the Clerk and Recorder by the Clerk to the Board upon approval.
C. Unless otherwise set forth in the Improvements Agreement Construction Schedule exhibit, the
improvements shall be completed within three (3) years of execution of the Improvements
Agreement. Otherwise, the Board, at its discretion, may make demand on all or a portion of the
collateral and complete the improvements or partially complete the improvements, which may
include, at the Board's discretion/ contracting to have the work completed by a third party.
Project Collateral may be provided separately for on -site and off -site Improvements.
Sec. 8-2-60. Release of Project Collateral.
A. Upon completion of the improvements in accordance with the Improvements Agreement, the
developer shall notify Weld County, so staff may inspect the improvements.
B. Following preliminary approval by County staff, the developer shall present a Statement of
Substantial Compliance signed and stamped by a Colorado Professional Engineer licensed to do
business in the state and a request for release of collateral. The Statement of Substantial Compliance
shall certify the work has been completed in substantial compliance with approved plans and
specifications, or that any material deviations have received prior written acceptance from the
County, and the engineer or his or her representative has made regular on -site inspections during
the course of construction and the construction plans utilized are the same as those accepted by the
County.
C. "As -built" plans are required for all public improvements, which may include but are not limited to,
public rights -of -way, permanent easements, or on -site drainage features. As -built" plans shall be
stamped by a Colorado Professional Engineer licensed to do business in the state certifying the
project is in substantial compliance with the plans and specifications and shall be submitted at the
time the letter requesting release of collateral is submitted.
D. For improvements to public rights -of -way or permanent easements, materials test results must be
submitted for all phases of the project, as per the Colorado Department of Transportation (CDOT)
Schedule for minimum materials sampling testing, and inspections found in the CDOT Materials
Manual.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 8 of 140
CHAPTER 8 - Public Works
ARTICLE II Reserved
E If applicable, a letter of acceptance of maintenance and responsibility identifying all improvements
are in place and in accordance with the approved plans submitted from the appropriate utility
company, fire, water, and/or other special district, and/or municipality for any utilities and
improvements shall be submitted with the request for release of collateral.
F. The written request for release of Project Collateral shall be accompanied by Warranty Collateral in
accordance with Section 8-2-70, Warranty Collateral, below.
G. County staff shall schedule the request for consideration by the Board at a regularly scheduled public
Board meeting and notify the applicant of the hearing date and time. The Protect Collateral shall be
released after final written acceptance by the Board.
Sec. 8-2-70. Warranty Collateral.
A. Warranty Collateral shall be in an amount equal to fifteen percent (15%) of the value of the
improvements as shown in the Improvements Agreement, excluding improvements fully accepted
for maintenance by the responsible governmental entity, special district, or utility company.
B. The warranty period shall be two (2) years from the date of the Board's consent to re ease the Project
Collateral.
Sec. 8-2-80. Release of Warranty Collateral.
A. Following the conclusion of the warranty period, the applicant shall submit a written request for
release of the Warranty Collateral to Weld County.
B. County staff shall inspect the improvements. If the improvements need mitigation or repairs are
required, said work must be completed prior to release of the Warranty Collateral. In the event an
applicant fails to adequately repair improvements associated with the Improvements Agreement,
the County shall have the authority to pursue, at its sole discretion, Warranty Collateral to the extent
necessary to complete the repairs in order to preserve public interest.
C. If no improvements require mitigation or repairs, County staff shall schedule the request for
consideration by the Board at a regularly scheduled public Board meeting and notify the applicant of
the hearing date and time. The Warranty Collateral shall be released after final written acceptance
by the Board
Sec. 8-2-90. Proportional Share Process for Improvements Agreements
A. The proportional share process is an important tool used by the County to identify the shared cost of safety
improvements for existing and new development to mitigate impacts to the county road system.
B. Weld County uses the Equivalent Single Axle Load (ESAL methodology when calculating an Improvements
Agreement proportional share. The ESAL methodology is a national standard for normalizing traffic counts
to reflect the actual damage caused by large vehicles. The purpose of the methodology is to create the
most reasonable and fair method for analyzing traffic data and the impacts to county infrastructure.
C. Weld County maintains a current list of approved and recorded Improvements Agreements. Annually, the
Improvements Agreement haul, or travel routes are evaluated to determine which roads will have
proportional share costs for Weld County identified projects the next calendar year and therefore, what
owners/land use permits will be affected so they can be notified in advance.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 9 of 140
CHAPTER 8 - Public Works
ARTICLE II Reserved
D. Once the Improvements Agreement permit holders are identified, Development Review sends a courtesy
letter notifying them of the anticipated proportional share associated with their USE. This letter is meant
to be general in nature and will not contain specific costs or percentages associated with the required
contributions. It is meant to give permit holders preliminary notice that a project will be occurring in the
upcoming calendar year.
E. On or before December 31 of the year prior to the Weld County identified projects, the permit holder will
receive another letter giving the proportional share percentage with supporting documentation. An
estimated cost will also be provided at this time.
F. Permit holder shall have the opportunity to review supporting documentation, review, comment and
supplement the County's data, collection methodology and determinations. If the project is completed by
the Public Works Department, the proportional share will be based on materials only. If the work is
completed by a private contractor, the cost will be based on both materials and labor.
G. The final cost will be based on actual costs of the work performed and will be invoiced to the permit holder
at the completion of the project.
H. The County's criteria for calculating the ESAL proportional share is identified in Appendix 8-Q.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 10 of 140
CHAPTER 8 - Public Works
ARTICLE III Road Access Culverts
ARTICLE III Road Access Culverts
Sec. 8-3-10. Purpose
For the purpose of this Article, culverts may refer to, road culverts, driveway/access culverts, cross culverts,
irrigation culverts, and similar structures that convey and maintain the natural flow of water carried in the roadside
ditches.
Sec. 8-3420. Installation of access culvert.
A. The owner of -he property owner shall pay the costs for materials and the cost of installation for new road
access culverts whenever the installation of a culvert is made necessary by the creation of a new access from private
property to a County road, by any alteration of the natural flow of water across private property by the owner, or
for any other reason created by any owner of private property. The culvert shall be installed according to the
Appendix 8Q of the Weld Count Engineering and Construction Criteriaspecifications of the Department of Pt -4+c
Works as to size and location in the County rights -of -way or other County property in which such culverts may be
installed. Consideration of culvert sizing shall be based on the existing upstream and downstream culvert diameter
size. The culvert size will be determined in accordance with standard engineering practices by Public Works
Operations at the time of culvert installation, Tthe property owner shall be responsible for cleaning the borrow or
roadside ditch to the extent required to accommodate the road access culvert and insuring --ensure proper drainage.
B. Property owner/User shall submit a Culvert Installation Form to Public Works for invoicing of the materials
of the culvert installation. Property owner/User shall provide payment prior to culvert installation. The application
form is available at Public Works.
Sec. 8-3-230. Maintenance.
After county acceptance of the culvert installation, Weld County shall be responsible
for the maintenance and repair of the road access and/or any related culvert. If, after install-ation, such owner or
(15) days to make such repair or perform the needed maintenance. 4-n the coven -t of the property owner's fai-l-ire to
perform such maintenance, the County shall perform such repair and/or maintenance as may be required for the
ices within the right of way. The responsible property owner
In the event of an emergency or if a hazardous situation is observed or
detected, the property owner shall be notified and requested to provide an immediate remedy to the situation. If
the property owner fails to react, the County shall correct the hazardous situation and may bill the property owner
for all incurred expenses.
Sec. 8-3-40. Maintenance of irrigation structures.
The County's duty to maintain culverts, bridges or similar structures used for irrigation purposes shall be in
accordance with the following statutory requirements:
A. Section 43-5-305(1), C.R.S., which states as follows:
"Any person or corporation owning or constructing any ditch, race, drain, or flume in, upon, or across
any highway shall keep the highway open for safe and convenient travel by constructing culverts, bridges,
or similar structures over such ditch, race, drain, or flume. When any ditch is constructed across, in, or
upon any highway, the person owning or constructing such ditch shall construct a culvert, bridge, or
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 11 of 140
similar structure long enough to conduct the water from shoulder to shoulder from such road or highway
or of such greater length as the Board of County Commissioners having jurisdiction thereover may
require, plans for the culvert, bridge, or similar structure having been approved in advance by the Board
of County Commissioners. The Board of County Commissioners shall maintain the culvert, bridge, or
similar structure after construction, in accordance with the provisions of Section 37-84-106, C.R.S."
B Section 37-84-106, C.R.S., which states as follows:
"All bridges constructed over any ditch, race, drain, or flume, crossing any public highway, street, or alley,
after construction, shall be maintained by and at the expense of the county or municipality in which the
ditch, race, drain, or flume may be situated."
C. In the event of an emergency or if a hazardous situation is observed or detected, the County shall notify
the property owners/users to request the irrigation water be shut off in con1unction with property
owners/users schedule, in order to perform emergency repairs. If Public Works identifies this road as an
essential travel or haul route, or inadequate detour route availability and the property owner/users fails
to react, the County shall correct the hazardous situation and may bill the property owner/user for any
incurred expenses.
Sec. 8-3-350. County AuthorityGeneral conditions.
A. Enforcement: Without limiting the availability of any other remedies, the provisions of this Section may be
enforced by means of an action brought at the direction of the Board of County Commissioners for damages,
injunctive relief or in nuisance.
B State laws: No portion of this policy is intended to authorize any person to alter the flow of water in a manner
contrary to the laws of the State regarding water rights or drainage.
ARTICLE IV Use of Borrow or Roadside Ditches
Sec. 8-4-10. Purpose.
Borrow or roadside ditches are intended to intercept surface water from agricultural fields or residential
property. Roadside ditches are not intended to accommodate forced point source discharges. Tailwater ditches are
not recognized as part of Weld County's conveyance system.
Sec. 8-4-420. ResponsibilitiesDuty of users.
Whenever possible, the county shall try to separate agricultural farming operations out of the county road
right-of-way, especially, when located in a municipal separate storm sewer systems :MS4) area. Persons in the
County who are currently using borrow/roadside ditches along County rights -of -way for agriculture irrigation runoff
and other uses, whether the consent to such uses was originally given expressly or implied, must adhere tomay
continue such uses if the following conditions are met:
A. The owner and user are responsible for preventing irrigation water or other uses from causing silt, other
sediment or weeds to accumulate in the borrow ditches so that proper drainage is not inhibited.
B The owner and user are responsible for preventing the blockage of the borrow ditches and must not
alter the direction or rate of flow in any manner in the borrow ditches.
C. The owner and user are responsible for preventing the irrigation water and other uses from causing
damage to County rights -of -way.
D Tail water shall be controlled to prevent erosion and sedimentation of the borrow ditches.
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 12 of 140
Sec.8-4-30. Maintenance.
A. Public works prioritizes and maintains Roadside Ditches on a case -by -case basis, as needed, to remove
sediment, debris, trash, or other encumbrance that may be impeding the proper flcw of water. In the
the adjacent
(•Landowner's or tenant's may --shall contact Public Works and r ry icy uestto request an for
inspection of a Roadside Ditch. Public Works personnel will inspect and schedule the Roadside Ditch to
be cleaned, if deemed necessary. In the event drainage water overflows a Roadside Ditch, Public Works
personnel will inspect the Roadside Ditch and determine if action, such as ditch cleaning, is required or
if the event produced excessive runoff beyond the capacity of the drainage system.
Roadside ditches are intended to carry stormwater from county roads to natural drainage basins. The
amount of stormwater a roadside ditch carries varies. For planning purposes, Weld County never
assumes a roadside ditch can carry more water than five 5) cubic feet per second (cfs
C. Nonexclusive License Agreements "NELA's for private irrigation structures located in county rights -of -
way shall be done by separate Agreement on a case -by -case basis where the Board grants a
nonexclusive license to access, construct, operate, and/or maintain privately owned equipment within
county road right-of-way/property.
Sec. 8-4-240. Violations.
If the Board of County Commissioners determines that users are violating the above -stated conditions, the
Board may consider the revocation of its prior consent, whether express or implied. The revocation of consent may
be entered by resolution of the Board of County Commissioners, following notice to the owner and user (if the user
can be determined), and a hearing held pursuant to the procedures for adjudicatory type hearin€s. The Director of
Public Works shall have the burden of showing, by a preponderance of evidence, that the owner and user have failed
to comply with Section 8-4- ,0 herein.
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 13 of 140
CHAPTER 8 - Public Works
ARTICLE V Cattle Guards
ARTICLE V Cattle Guards
Sec. 8-5-10. DefinitionPurpose.
Person includes any individual, business or corporationLerson, who is not a landowner, must demonstrate
authority to act on behalf of the landowner prior to coordination with the county on the installation of cattle guards.
Cattle guards are intended to restrict the movements of livestock and are not intended to be used for drainage and
utility purposes.entering in le County.
Sec. 8-5-20. New installations/Relocation:
Any person in the County who wishes to install a cattle guard on any County road may do so only upon the
following conditions:
A. Property owner/User shall submit a Cattle Guard Installation/Relocation Form to Public Works for
invoicing of the cost of the materials of the Cattle Guard installation/relocation. Property owner/User
shall provide payment prior to Cattle Guard installation/relocation. The application form is available at
Public Works.
A.B. The entire cost of installation or relocation of a cattle guard is paid by the person making the request:
with the County doing the installation/relocation or by requester with the County's written approval.
Weld County will be responsible for maintenance and cleaning of Cattle Guards after installation is
completed.
C.B. The Department of Public Works shall be notified prior to installation/relocation of a cattle guard. An
invoice will be sent and payment received in accordance with the written agreement,
form attached in Appendix 8-C of this Chapter_ must be received by thethe Department of Public Works
must receive the form at least fifteen thirty (30) days prior to the date of the installation/relocation.
The agreement between the Department of Public Works and the person making the request, detailing
the rights and obligations concerning the cost of the Cattle Guard shall be signed by the person making
the application. +Maintenance and repair of the cattle guards shall be Weld County responsibility.
Any cattle guard which is installed inupon a County road rights -of -way must comply with any and all
standards required by the Department of Public Works, including but not limited to, the County's
Specifications for Cattle Guard Installation.
Sec. 8-5-30. CleaningMaintenance.
A. Any person who benefits from any cattle guard located upon any maintained County road has the
responsibility to periodically inspect for maintenance, proper function and inspect for cleaning. The person
must notify Public Works the County within the same five (5) working days in which the person obtains the
knowledge of the need for maintenancecleaning.
Cattle guard maintenance includes but is not limited to, The word clean includes the removal of all sand, dirt,
silt and other solid debris which renders the cattle guard ineffective. The county deems a cattle guard cleaned
when clean the space within the cement box and below the grate of the cattle guard are free of debris -
Cattle Guard maintenance requests may be completed by the County within thirty (30)
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 14 of 140
The person may request the County to clean the cattle guard; however, the person will pay the cost of the
cleaning prior to the work being done. The person requesting the cleaning wil provide written
form to the provisions of the County policy for cattle guards on County
roads.
Cleaning of the cattle guard must be completed within one (1) working day. The person shall notify the
r to commencing the work. If
the per -son be ieves that such cleaning is like y to extend into tie next working day, the person sha I replace
tie grate of the catt e guard prior to one -ia f 4 1/2) i-our before sunset.
he road on which t
be closed duri
signs necessary in order to warn oncoming motorists of t
�e roac closure, using signs in accordance with t
Manual on Uniform Traffic Devices. The person may use signs provided by the County for such purposes.
B. The maintenance repair of any cattle guard on any maintained County road shall be the joint responsibility
of the County and the person who benefits . The County will provide the labor for the
benefitiig from the cattle
guard pays for all other materials used in the repair.
C. In the event, a Cattle Guard is deemed, by the County, to be beyond maintenance or repair, the County
shall replace the cattle guard at the county's expense.
Sec. 8-5-40. Replacement,
A. In the event any cattle guard located upon any County roac is ceemec by tie County to be beyond repair, the
cattle guard shall be replaced. The County shall pay for the entire cost of said replacement.
person so requesting will conform to the provisions of
Said replacement shall be done in accordance with the County's specifications for cattle guard installations.
The entire cost of said replacement sha-fl be paid the Cou-nty,for by the person making the request for
replacement.
It is the responsibility of any person who benefits from a
the County of the need for repair or the need for cleaning ten (10) working days prior to livestock habitation. The
dge of
the need for repair.
witho
the County, fails to provide notification for need for repair, ar fair to provide for periodic inspections cleaning or
assist in the for repair and replacement of the cattle guard may be subject to the cattle guard being removed by the
County following ten (10) days' notification and the opportu-n+ y to apply to the Board of County Commissioners
certified mail-, return receipt requested, or by —personal service in accordance with the Colorado Rules of Civil
Procedure.
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 15 of 140
Sec. 8-5-740. Vested right.
No portion of these policies shall be considered to have vested any person with the right to a particular size of
cattle guard. The County, upon a determination that road improvement or widening is necessary, may require
replacement of existing cattle guards. The county is responsible for Cattle Guard costs will be shared in accordance
with Section 8 5 40 above.
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 16 of 140
CHAPTER 8 - Public Works
ARTICLE VI Miscellaneous Provisions
ARTICLE VI Miscellaneous Provisions
Sec. 8-6-10. Gravel pits.
The County shall obtain all required state and federal permits for Public Works operations.
A. Gravel obtained from County permitted gravel easements and sites shall not be sold or used for other
than governmental purposes, except by specific authorization of the Board of County Commissioners.
B. The County will acquire, in its name, all gravel mining permits for gravel mining on County -owned
property. When the property is not owned by the County, the issue of the obligation to obtain, maintain
and pay the costs of permits shall be addressed contractually.
The County's duty to maintain culverts, bridges or similar structures used for irrigation purposes shall be in
accorcance wit i tie fo owing statutory requirements:
A. Section 43 5 305(1), C.R.S., which states as follows:
"Any person or cor
any lig iway s is I <cep tie lig iway open for safe ant convenient travel by constructing culverts, bridges,
or similar structures over such ditch, race, drain, or flume. When any ditch is constructed across, in, or
upon any highway, the person owning or constructing sect - — ----l-l----------------�------- -•4- - -
or of such greater length as the Board of County Commissioners having jurisd+cticn thereover may
require, plans for the culvert, bridge, or similar structure ha vance by the Board
of County Commissioners. The Board of Cou-nty Commissioners shall maintain the culvert, bridge, or
similar structure after construction, in accordance with the provisions of Section 37 84- 106, C.R.S."
B. Section 37 84 106, C.R.S., which states as follows:
"All bridges constructed over any ditch, race, drain, or flume, crossing any public hig
after construction, shall be maintained by and at the expense of the c
ditch, race, drain, or flume may be situated."
The County shall obtain all required state and federal permits for Public Works operations. The County will
acquire, in its name, a grave mining permits for grave mini-ng on Co
not owned by the County, the issue of the obligation to obtain, maintain and pay the costs of permits shall be
addressed contractually.
Sec. 8-6-40. Reserved.
Editor's note(s)—Weld County Code Ordinance 2018-03 , adopted September 17, 2018, repealec § 8-6-40, which
pertained to road maintenance policy. See Section 8-6-150 for similar provisions.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 17 of 140
Sec. 8-6-50. Reserved.
(Deleted by Weld County Code Ordinance 2010-5)
Sec 8-6-60. Sign policy,
A. The County sign shop shall produce signs for County maintained roads in subdivisions, unincorporated areas
and historic townsites; where the signs are produced pursuant to a separate intergovernmental agreement
the signs by the persons making such requests.
B. All signs placed in the County rights of way must conform to the Manual on Uniform Traffic Control Devices.
No signs, except those installed by the County, shall be located within County rights of way and all signs
licable building and zoning codes
{Weld County Code Ordinance 2018 03 }
Sec. 8-6-60. Reserved.
(Deleted by Weld County Code Ordinance 2010-5)
Sec. 8-6-70. Grader -she -!Satellite Facility use.
Grader Gravel Road operators living adjacent to County grader sheds may use grader sheds in accordance with
the agreement entered into by the County and operator. Grader Gravel Road operators may park personal vehicles
in grader sheds satellite facilities while performing road maintenance work for the County, if the personal vehicle is
not parked in the grader shed satellite facility ,n lieu of a County -owned grader. Any personal use of grader sheds
satellitesatellight facilities by County employees or any other individual except as specified above is prohibited t �-
Sec. 8-6-80. Grader shed Satellighte Facilities utilities and rents.
When the County owns the grader shed satellite facility and a trailer pad, that item associated with the grader
shed satellite facility will be provided at no cost. Electricity will be provided for the dwel-li-ng located at the Kiowa
Other than as specifically stated
herein, utilities of gas and electricity shall not be provided to any grader operator in the County. Each operator will
be responsible for his or her own gas and electricity.
Sec. 8-6-90. County expenditures for roads within municipal boundaries.
No County funds shall be spent on the construction, upgrade, paving and/or maintenance of streets, roadways
and/or highways located within incorporated municipal boundaries, unless authorized by resolution of the Board of
County Commissioners.
Sec. 8-6-100. Gravel road fugitive particulate emissions policy and procedure.
A. General. Growth throughout the County has led to increased vehicular traffic on all roadways under the
County's jurisdiction, as a result fugitive dust application may also be required for detour routes, or any other
reason deemed appropriate by Public Works.
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 18 of 140
B. Fugitive dust applications may be required if increased traffic on unpaved County roads has resulted in
dissatisfaction with the levels of fugitive particulate emissions caused by vehicles travelirg those roadways.
The County must also make reasonable efforts within budgetary constraints to comply with regulations
established by the State Air Quality Control Commission regarding this issue. In an effort to reasonably comply
with air quality regulations, the policies and/or procedures set forth in this Section will be adhered to when
considering requests for fugitive dust abatement.
B. Responsibility for fugitive dust. The County -maintained roadway segments with Annual Average Daily Traffic
(AADT) volumes exceeding two hundred (200) vehicles per day should be treated to inhibit fugitive dust at the
expense of the County subject to available budgetary appropriations. The process for the determination of
qualifying AADT volumes will be as outlined in Subsection C below. Roadway segments with AADT volumes
below two hundred (200) vehicles per day may also be treated for fugitive dust at the expense of property
owners in accordance with Subsection E of this Section.
C Procedures for determination of traffic volumes in conjunction with fugitive dust issues.
1. Routine counts. Traffic counts will be taken as needed every three (3) years on approximately one
thousand five hundr
gravel roadway segments in areas of the County which are
determined by the County to have significant growth trends. When the forty eight hour counts indicate
in place for up to seventy two --(72) consecutive hours.
2. Counts to determine eligibility for fugitive dust control. When a request is made for traffic counts on a
roadway segment to determine its eligibility for fugitive dust control, the count will be performed, unless,
as determined by the County:
a. An existing AADT of less than one hundred fifty (150) vehicles per day was performed in the last
twelve (12) months.
b There are no known new permanent traffic generators using the roadway segment which would
cause an increase in traffic volumes to or in excess of two hundred (200) vehicles per day.
3. Traffic count procedure. All traffic counts will be taken over a period of forty eight (48) to seventy two
(72) consecutive hours, averaged to establish a daily volume, and adjusted for seasonal usage using the
t factor set forth in Appendix 8 D to this Chapter. The resu4tin-g AADT volume wits
serve as a guideli-ne to determi-ne eligibility for County funded fugitive dust . If the
AADT count exceeds two hundred (200) vehicles per day, the roadway segment will be recounted in
ninety (90) calendar days using the methods noted above to confirm the original count. If this count is
significantly below the two hundred (200) vehicles per day AADT, the roadway may not be treated by
the County for fugitive dust control. When the County determines the use of weekend cr partial weekend
counts could assist in establishing a representative average daily traffic count when factored with
weekday counts, the seventy -two-hour count may include those time periods.
D Determination of fugitive dust control mitigation. When a roadway segment meets the criteria for County
mitigation, the County may, when practical and within budgetary constraints, select one (1) of the following
alternatives to mitigate fugitive dust:
1. Surface treatment using dust control agents with a frequency of no more than two (2) applications per
year at the County's discretion.
2. Six inch stabilized aggregate base using dust control agents. Full depth treatment using dust control
agents using no more than two (2) applications per year at the County's discretion.
3 Recycled asphalt treatment up to eight -inches (8" and may also include a dust control agent, per Public
Works discretion.
(Su pp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 19 of 140
4. Asphalt or concrete Ppaving, based upon qualification though the Capital Improvement Project
prioritization process.
45. Speed limit reductions.
5. Periodic watering.
The mitigation alternative and time of implementation will be based on budget and seasonal constraints. The County
will confirm the need for continued mitigation on roadway segments by conducting annuatraffic counts using the
procedures noted above and maintaining historical traffic count records. Should the AADT on a road segment fall
below two hundred (200) vehicles per day, dust control mitigation may be discontinued by decision of the Board of
County Co missionersPublic Works.
E. Private application. The County has no objection to individuals applying dust control chemicals to County roads
at their own expense, provided that they agree to the following conditions:
1. Chemicals used for dust control may not contain any hazardous substances as defined in Section 29-22-
101, C.R.S. Individuals are advised that petroleum products, whether commercially processed or not,
may contain hazardous substances.
2. Privat application shall not include Usused oil applications }gay not be used.
3 Dust control chemicals must be applied in such a manner that will not contaminate any waters of the
State.roadside ditches. Therefore, any materials which may wash from the roadbed will not be suitable.
4 The County will make every effort not to disturb the section of road which has been treated with dust
control chemicals. It will be the County's decision at what point the roadway must be graded to restore
a reasonable travel surface. The County will not be responsible for reapplying dust control chemicals.
5. All dust control agents used on County roads shall be approved for use by the Department of Public
Health and Environment and the Department of Public Works. Currently, the materials listed in Appendix
8 D to this Chapter are approved for use. The County reserves the right to add or delete materials from
tie approves list at any time wit lout p e to a County roac for
purposes of dust control, not s-ecifica-4ly identified in the approved list of materials, shall be approved
6. The County will grade the roadbed prior to the application of dust control chemicals at no cost to the
individual.
7. All private application must be applied by a Weld County approved vendor, who must obtain a county
right-of-way use permit.
(Weld County Codification Ordinance 2000-1; Weld County Code Ordinance 2002-1)
Sec. 8-6-110. Survey monuments.
A. The destruction of monuments can be a criminal offense and can lead to substantial costs for the County or
adjacent landowners when the need arises to replace those monuments. The following procedure is to ensure
that the monuments can be documented and replaced or relocated as road work is performed.
B In order to avoid having surveyors dig holes in paved the road intersections to locate the monuments, the
monument should be enclosed in a box which is kept at least one -quarter inch '1/4") below flush with the
roadway ;rave& or asphalt paved surface.
1. The County will supply the monument boxes to the survey companies, and the companies will continue
to handle the physical labor of installation.
Created: 2022-02-24 12:36:43 [EST]
(Su pp. No. 76)
Page 20 of 140
2 The boxes will be issued through the Department of Public Works. Prior arrangements should be made
to pick the boxes up, as Department of Public Works will not supply the labor or equipment.
3. Efforts will be made by Public Works employees to protect existing markers during paving, overlay and
patching projects with spacers.
4 Sites of new construction projects will be checked and marked by Department of Public Works before
work begins. The Director of Public Works will be consulted and will inspect the area when the work is
complete.
5. Spacers will be put in to elevate the existing box on overlay projects. If a marker is damaged, the Director
of Public Works will be notified. The Department of Public Works will place a new box over existing pins
before construction begins.
C. For gravel roads, the monument shall be located at least one foot below the roadway surface.
CD. On concrete paved roadways the monuments shall be surface mount type CDOT class section 629, type 5
Brass) and shall be recessed 1/2" below the surface.
(Weld County Codification Ordinance 2000-1)
Sec. 8-6-120. Weed control.
A. The County has an obligation to control noxious weeds on County property as established by the Pest Control
Districts Act (Section 35-5-101 et seq., C.R.S.) and the Colorado Weed Management Act (Section 35-5.5-101 et
seq., C.R.S.). The Undesirable Plant Management Plan contained in Chapter 15 of this Code will be followed in
controlling noxious weeds on County property.
B The County also has an obligation to control weeds bordering County roads and at intersections and traffic
control signs in order to ensure safe traffic flow and motorist visibility. In addition, general vegetation control
along designated County roads is necessary to reduce snow drifting onto the roads.
C. The Board of County Commissioners resolves that general weed control will be carried out only along
designated roadsides to increase motorist visibility at intersections and traffic control signs, and to prevent
snow drifts along County roads.
D. The methods of weed control used by the County shall be by mowing or spraying herbicides. Equipment in the
Pest and Weed Division of the Department of Public Works will be used.
(Weld County Codification Ordinance 2000-1)
Sec. 8-6-130. Trees in rights -of -way.
A. The County has a duty to protect motorists by ensuring that dead trees and tree overgrowth ft -0m overhanging
branches do not create road hazards by obstructing visibility.
B. It is the policy of the County that when trees on private property begin to obstruct visibility on County roads,
the property owner shall be given notice to trim the trees within a reasonable time or the County. Will do so
and bill t
C If a tree or branches from a tree on private property fall onto the County rights -of -way, the tree or tree
branches will be pushed back onto the private property by the County work force.
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 21 of 140
D The County shall trim or remove all trees growing in County rights -of -way that obstruct visibility for the safety
of motorists at the County's expense.
(Weld County Codification Ordinance 2000-1)
Sec. 8-6-140. Reservedoad striping,
A. The County"s roads require certain striping, per the Manual on Uniform Traffic Control Devices. The County
has limited resources for Public Works operations and can only provide minimum services.
B. The County may provide center or edge striping on arterial or collector roads when required to enhance safety.
Sec. 8-6-150. Road maintenance acceptance policy for public roads.
Persons desiring to obtain County maintenance of public roads shall first address such request to the Board of
County Commissioners for its consideration at one (1) of its regularly scheduled business meetings. The person
making the request shall be responsible to pay the entire cost of notification to owners and/or occupants of lands
lying adjacent to the roadway. Such notification shall include a description of the request and shall set forth the time
and place of the Board consideration. County maintenance of public roads may occur only if authorized by resolution
of the Board of County Commissioners. Before a public road may be authorized by the Board for maintenance, the
road must meet the following minimum construction conditions:
A. The road right-of-way shall be dedicated or otherwise secured to the satisfaction of the County for use by the
public and maintenance by the County.
B The road right-of-way shall be clearly staked and flagged for construction purposes by a licensed land surveyor.
The surveyor shall notify the Department of Public Works, in writing, when the staking is completed.
C The width of the road right-of-way shall not be less than sixty (60) feet.
D. The road shall serve a minimum of fivethree (35) legal lots, which must be developed with residential,
commercial or industrial improvementswhich must have residential d-wel-lings, to be considered for
acceptance. Properties abutting the intersection of the road under consideration for acceptance and an
existing publicly maintained road do not count toward the required threefive (35) lots.
E TheAny new road width shall be a minimum of twenty-six (26) feet of graveled surface or meet the minimum
design guidelines for the anticipated traffic on the roadway segment being considered.
F The following shall be the minimum acceptable standards before a road is accepted for maintenance:
1. The roadway cross -slope, from centerline, shall be not less than three percent (3%).
2. Borrow ditches shall be a minimum of twenty-four (24) inches deep with -34:1 side slopes and
graded to provide adequate drainage on a case by case bass-eis.
3 All driveway side road borrow ditches shall be sufficient to carry the five-year storm or be a
minimum of an eighteenfifteen-inch-dia meter culvert or culvert size based on the upstream and
downstream culvert size as determined by the Director of Public Works. Crossroad drainage
structures shall be sufficient to carry the ten-year storm or be a minimum of an eighteenfifteen-
inch culvert as determined by the Director of Public Works.
4 The Department of Public Works shall test and inspect the roadbed subgrade for structural
adequacy and acceptable materials, in accordance with the most current versions of the CDOT
Field Materials Manual, reference CP 23, -and the Standard Specifications Book SECTION 203
EXCAVATION AND EMBANKMENT construction specifications. The subgrade shalt be compacted to
Created: 2022-02-24 12:36:43 [EST]
(Supp. No. 76)
Page 22 of 140
ninety five percent (95%) of AASHTO Standard Proctor T 99 (Method A) or other compaction
5. A minimum of four (4) inches of compacted surface gravel meeting in accordance with Table 9-12 of the
Weld County Engineering & Construction Criteria found in Appendix 8-Q. Colorado Department of
Transportation specifications for Class 6V1 material must be provided on the traveled surface. The gravel
tandard Proctor T 9918O (Method D) requirements.
G There shall be no fences or other obstructions within countythe road right-of-way. If cattle have cross -access
to the roadway, a cattle guard shall be installed in accordance with Article 8-SV above.the County cattle guard
policy.
H. If a fence exists along the section line on which the road is to be built, relocation of the fence to the county
road right-of-way lines shall be the responsibility of the sponsor(s) of the roadway project.
I. Reimbursement by the persons requesting authorization of County maintenance of public roads shall be made
for acreage within the county road right-of-way included in an adjacent property Conservation Reserve
Program (CRP) crop or which has an unharvested annual crop demolished by the roadway construction project.
The persons requesting authorization of County maintenance of public roads shall be responsible for all costs
associated with construction of the roads and may utilize various means of funding necessary improvements,
including, without limitation, local improvement districts approved by the Board of County Commissioners.
(Weld County Codification Ordinance 2000-1; Weld County Code Ordinance 2002-1; Weld County Code Ordinance
2018-03)
Sec. 8-6-155. Road maintenance policy for private roads, lanes or driveways.
Weld County does not maintain private roads, lanes or driveways.
Sec. 8-6-160. Repealed.
(Weld County Code Ordinance 2013-14 )
Sec. 8-6-170. Obstructions within county rights -of -way.
The County reserves the right to maintain its road rights -of -way without obstructions located thereon.
Obstructions include, but are not limited to, fences, trash cans, gates, landscaping materia s, and irrigation
structures, and any structure that does not meet the intent of being constructed with breakaway materials,
regardless of whether or not they are physically located on the traveled portion. Obstructions shall be removed from
the County road rights -of -way upon request by the Department of Public Works. The total expense of the removal
of any obstruction from a County road right-of-way will be paid by the person who installed the obstruction, or by
the person exercising ownership or control over the obstruction. In the event such person does not remove the
obstruction as requested, the County will remove the obstruction and bill the person responsible for the obstruction
for any expenses incurred in its removal. This Section shall not alter any rights, responsibilities and/or penalties
regarding the act of obstructing highways as set forth in Sections 18-9-107 and 43-5-301, C.R.S.
forth in Appendix 8 L. Upon submittal of a Roa
with fee to the Department of Public Works, the County shall review application for acceptance. If accepted,
(Supp. No. 76)
Created: 2022-02-24 12:36:43 [EST]
Page 23 of 140
four (4) years after the date of installation. After the four (4) years, the sign s -hall be returned to the applicant
at the address shown on the application. If the application is not accepted by the County, the fee shall be
No private installation or maintenance is allowed. The memorial sign shall consist
of two (2) signs and shall appear like those set forth in Appendix 8 M.
B Memorial signs shall only be installed by the County on County maintained righ-ts of way. The Department of
dose as possible to the location given in the application. If that location
conflicts with existing signs or creates am unsafe condition, the sign will be moved to where it can be installed
safe y. If the roadway is annexed by a oca municipa ity after installation, the applicant will be required to
receive permission from that municipality for the sign to remain; otherwise, the County will remove the sign if
by the Board of County Commissioners, to help cover the sign's
ultiple fatality crash, the fee should be split
equally between those families who want their family members' names on the sign. Once removed, each
separate family shall receive a sign to keep.
D. This section is considered to be the County's permitting system for roadside memorial signs and is in lieu of
the procedural requirements of Section 43 2 149, C.R.S.
(Weld County Code Ordinance 2008 7)
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 24 of 140
CHAPTER 8 - Public Works
ARTICLE VII Reserved
ARTICLE VII Reserved'Signs and Pavement Markings
Sec. 8-7-10. Purpose.
The County's roads require certain pavement markings and signs per the Manual on Uniform Traffic Control
Devices, and Colorado state statute. The pavement markings and signs are to serve the public interest in traffic
safety.
Sec. 8-7-20. Sign policy.
A The County sign shop shall produce signs for County -maintained roads in subdivisions, unincorporated areas
and historic townsites; where the signs are produced pursuant to a separate intergovernmental agreement
with a governmental agency; and for non -County -maintained roads upon request and payment of the cost of
the ;blue) signs by the persons making such requests.
B. All signs placed in the County rights -of -way must conform to the Manual on Uniform Traffic Control Devices
(MUTCD). No signs, except those installed by the County, shall be located within County rights -of -way and all
signs adjacent to rights -of -way must meet applicable building and zoning codes.
(Weld County Code Ordinance 2018-03)
Sec. 8-7-30. Memorial signs.
A. The memorial sign must be requested by the victim's family or other sponsor with the consent of the
victim's family through an application. Upon submittal of a Roadside Memorial Sign Application with fee to
the Department of Public Works, the County shall review application for acceptance. The application form
is available at Public Works If accepted, the Department of Public Works shall provide, install and maintain
a requested roadside memorial sign for four 4; years after the date of installation. After the four (4) years,
the sign shall be returned to the applicant at the address shown on the application. If the application is not
accepted by the County, the fee shall be returned to the applicant. No private installatioi or maintenance
is allowed. The memorial sign shall consist of two (2) signs and shall appear like those set forth in Appendix
SM.
1. If accepted, the Department of Public Works shall construct, install, and maintain the requested
roadside memorial sign for four (4) years after the date of installation. After four 4' years, the
sign shall be removed and held for a period of thirty '30) days to provide the applicant the
opportunity to pick up the removed sign for keeping. Signs not claimed within the thirty (30) day
period will be recycled.
2. If the application is not accepted by the County, the fee shall be returned to the applicant. No
private installation or maintenance of roadside memorial signs is allowed.
'Editor's notes) —Ord. No. 2019 05 , adopted June 17, 2
Weld County Code Ordinance 2003 2.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 25 of 140
CHAPTER 8 - Public Works
ARTICLE VII Reserved
B. These memorial signs shall consist of two
the MUTCD.
2) sign panels measuring standard dimensions in accordance with
1. There are four 4 alternative messages for the top sign panel. These messages correspond with
the type of accident or situations that occurred during the accident. The four (4', messages are:
2•/
b. iff
a. it<.
"Please Drive Safely" — this is the most common message used for these signs.
"Please Ride Safely" — this message is for accidents involving motorcycles or bicycles.
"Please Buckle Up" — this message is for accidents involving victims who were not wearing
their safety restraints.
"Don't Drink and Drive" — this message may only be used for fatal alcohol/drug (DUI)
related accidents where there has been a conviction of the driver involved in the fatal
crash who was in violation of Colorado DUI laws, or a toxicology report showing the victim
driver to have been in violation of Colorado's DUI laws.
2. The bottom sign panel will include the message "In Memory Of" and the victim's name as shown
in the application. The bottom sign panel can show multiple names if there were multiple victims
in the accident and each of those victims' immediate family gives permission for the names to be
added in the application.
Memorial signs shall only be installed by the County on County -maintained rights -of -way. The Department
of Public Works shall install the sign as close as possible to the location given in the application. If that
location conflicts with existing signs or creates an unsafe condition, the sign will be moved to where it can
be installed safely. If the roadway is annexed by a local municipality after installation, the applicant will be
required to receive permission from that municipality for the sign to remain; otherwise, the County will
remove the sign if requested by the annexing agency . Removed signs shall be
held for a period of 30 days to provide the applicant the opportunity to pick up the removed sign for
keeping. Signs not claimed within the thirty (30) day period will be recycled.
The applicant shall submit a feel as determined by the Board of County Commissioners, to help cover the
sign's material cost, installation, maintenance, and removal by the County. In a multiple -fatality crash, the
fee may be split equally between those families who want their family members' names on the sign. Once
removed, each separate family may receive a sign to keep if requested. Removed signs shall be held for a
period of 30 days to provide the applicant the opportunity to pick up the removed sign for keeping. Signs
not claimed within the thirty '30) day period will be recycled.
This section is considered to be the County's permitting system for roadside memorial signs and is in lieu of
the procedural requirements of Section 43-2-1491 C.R.S.
(Weld County Code Ordinance 2008-7)
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 26 of 140
CHAPTER 8 - Public Works
ARTICLE VII Reserved
safety.
ARTICLE VIII Transportation Planning
Sec. 8-8-10. General.
Transportation planning for Weld County is a continuing, cooperative, and comprehensive process that
includes the development of planning documents, working with regional agencies, securing funding for
transportation projects, and reviewing safety data. Weld County collaborates with many different regional agencies
in order to plan and implement needed improvements to the transportation system. Planning of the roadway
network with respect to functional classification, alignment, and intersection/access spacing is developed through
transportation planning. Weld County will continue to build and maintain a safe and reliable transportation system
through prudent transportation planning.
Sec. 8-8-20. Purpose.
The purpose of this Article is to identify transportation planning policies, as well as the guiding technical documents
for Weld County for the basis of formulating in regard to transportation planning related policies.
Sec. 8-8- x_70. Weld County Transportation Plan and Functional Classification Map.
A. The Weld County Transportation Plan, as amended ("Transportation Plan"), is intended to summarize existing
transportation conditions, recommend policy, funding and roadway development for the County over a
twenty -five-year planning horizon. The Transportation Plan will serve an integral part in the decision -making
process for County staff and elected officials. The primary purpose of this Article is to provide technical
information that can be used as a basis for formulating transportation related policies. The Transportation
Plan will also be an extension of the Comprehensive Plan focusing on basic travel characteristics unique to the
County. The Transportation Plan is found in Appendix 8-N of this Chapter and is intended to be used in concert
with Chapter 22 of this Code. It is recommended to update this plan when updating the Comprehensive Plan.
B. The Functional Classification Map is a component of the Transportation Plan and is the process by which
County roads are grouped into classes according to the character of service provided. Grouping the roads into
classes identifies the required minimum width of future road right-of-way and locations for future road right
of -way reservation. The Transportation Plan recommends It is recommended to update Tthe Functional
Classification Map every two (2)
TA link to t may be reviewed every two to three years, and can be amended by the Board of County
Commissioners, as needed by Resolution. A link to the Functional Classification Map is found in Appendix 8-O
of this Chapter.
C. The minimum road right-of-way widths are as follows unless shown otherwise on the Functional Classification
Map found in Appendix 8-O of this Chapter:
1. Arterial: 140 feet. Arterials may include planned roundabouts or other traffic features that necessitate
expanded road right-of-way width as shown in arterial studies adopted by the Board of County
Commissioners by resolution.
2. Collector: 80 feet.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 27 of 140
3 Local: 60 feet. All roads that are maintained by Weld County have a minimum of 60 feet of road right -of -
.1
4 Minimum road right-of-way widths for "Arterials Not Constructed" shown on the Functional
Classification Map found at Appendix 8 0 of th+s chapter are found in project identifications and/or
designs approved by the Board of County Commissioners by resolution.
5 Minimum road right-of-way widths for Weld County four -lane controlled -access highways detailed in
C.R.S. Section 43-2-110 are identified in approval documents.
D Where road right-of-way has not been dedicated or otherwise acquired by the County, but the County
maintains a public road, the width of the prescriptive road right-of-way, which includes the entire area
necessary for maintenance by the County, shall be a minimum of 60 feet (30 feet from either side of the center
of the road).
Weld County identifies primary and secondary roadway classifications, as required by Colorado
Revised Statute (C.R.S.) § 43-2-101. Each year, the Weld County Department of Public Works prepares submits
a map to be submitted to CDOT showing the Weld County Primary and Secondary Road System, and showing
the total miles of public roads inmaintained by Weld County which have been accepted by the County
Commissioners and are eligible for participation in the HUTF, pursuant to the requirements of C.R.S. §43-2-
110;1)
There shall be established in this state a system of roads known as "the state highway system". The state
highway system shall consist of the federal aid primary roads, the federal aid secondary roads, and the
interstate system, including extensions thereof within urban areas, plus an amount not to exceed five percent
while not being any part of any federal system.
"Interstate system" as used in this section means any highway included as a part of the national system of
interstate and defense highways as authorized and designated in accordance with section 7 of the "Federal
Aid Highway Act of 1944" (58 Stat. 8384 and any other subsequent acts of congress.
Nothing in this section shall be construed as timiting the mileage of the state highway system to the total
mileage constituting the system as of December 31, 1953, but federal aid primary roads and federal aid
determined by said department. Deletions from the federal aid secondary system shall be mutually decided
by the federal government, the state, and the affected county.
expenditure by the state of federal aid funds to be apportioned to the state pursuant to the provisions of 23
specifically provides to the contrary.
of 23 U.S.C. sec. 135, as amended, and section 10- of the "Federal Aid Highway Act of 1970" shall be paid into
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 28 of 140
(b) Afte
The construction of all improvements authorized pursru-ant to the provisions of 23 U.S.E. sec. 135, as amended,
and section 106 of the "Federal Aid Highway Act of 1970", and moneys received therefDr, are under the
supervision and control of the chief engineer.
C.R.S. § 43 2 110:
(1) The initial selection of the county road system shall be done in the following manner:
board shall cause notice of intention to adopt said map as the official map of such system to be given, which
notice shall specify the time and place at which all interested persons will be heard. Such notice of intention
n in the county.
nges or revisions
deemed by it to be advisable, as the official map of the road system of the county.
more may des
which commences i-n 2016, that is located within the unincorporated area of the county and that intersects
with an interstate highway or a United States numbered highway. If a city or an incorporated town
subsequently annexes any portion of a highway that has been designated as a primary road, the respective
is as follows:
appurtenances.
(b) The county has the authority to grant or deny access to the highway and to establish weight restrictions for
!zed by section 42 4 106 i 1) (2;, a-nd {3}, C R S
(c) The county h
used for vehicular travel up to a vertical height of twenty feet above the surface of the highway.
highwa
(e) The city or in
(f) The city or incorpor
highway
es under the highway at its own
highway, includ+ng storm sewer inlets and catch basins.
(g) The county has the right to utilize all storm sewers on the highway without cost; and if new storm sewer
local governing body of the city or incorporated town.
of the highway that is located within the city or incorporated town.
except street signs, on the portion of the highway located w-ith4n the ci-ty or incorporated town.
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 29 of 140
authority shall erect or maintain any stop sign or traffic control signal at any locati-o that requires the traffic
on the highway to stop before entering or crossing any intersecting highway unless the local authority first
obtains approva
For the purposes of this paragraph " "traffic control device
includes, but is not limited to, striping, lane marking, and channelization.
agreed upon. Costs of acquiring the rights of way may be the sole expense of the county or the city or
ent under which the rights of way were
seem-ed.
(I) The county is authorized to acquire rights of way for the highway by purchase, gift, or condemnation. Any
condemnation proceeding shall be conducted in the manner provided by law for condemnation proceedings
to acquire lands required for county highways. Nothing in this subsection (1.5) abrogates the right of a home
m) The county may enter into an inter
within the county to add to the highway specified roads or streets annexed by the city or incorporated town
urisdiction, control, and duty of thecounty and the city or incorporated town with respect to the highway and
may modify the division of such jurisdiction, control, and duty from the division specified in paragraphs 'a, to
2, All roads not on the county primary system and for which the boards of county commissioners assume
‘3' Nothing in this section shall limit the power of any board of county commissioners to subsequently include
or exclude any road from the county primary system in the same manner provided for the selection of the
that such abandoned portion is necessary for use as a public highway, then such abandoned portion shall
commissioners of the county wherein such abandoned portion is located within ninety days after such
abandonment.
(Weld County Code Ordinance 2011-5 ; Weld County Code Ordinance 2014-13 ; Weld County Code Ordinance 2017-
01 ; Weld County Code Ordinance 2020-17 )
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 30 of 140
the North
rricor P an "tie "P an',, w-iici P an encompasses an area in tle
y one (11 mi e on either side of 1 25 for a c 'stance of five (5', miles, beginning at WCR
40 and extending northward to Colorado State Highway 60. The Plan includes in Chapter VI a Transportation
the transportation
ion of the 125 Corridor within the County.
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 31 of 140
CHAPTER 8 - Public Works
ARTICLE IX Municipal Separate Storm Sewer System
ARTICLE IX Municipal Separate Storm Sewer System'
Sec. 8-9-10. Title.
This Article shall be known, and may be cited, as the "Weld County MS4 Stormwater Quality Ordinance "
Sec. 8-9-20. Authorization
A The County is required by state and federal law, and as a condition of its MS4 permit, to establish by ordinance
methods for controlling the introduction of pollutants to the MS4, in order to protect and enhance the water
quality of the waters of the State pursuant to and consistent with state statutes and regulations and the Clean
Water Act
B Section 30-15-401, et seq , CRS, enables counties to adopt ordinances for the control or licensing of those
matters of purely local concern and to do all acts and make all regulations which may be necessary or expedient
for the promotion of health or the suppression of disease
C Section 30-15-401(11)(a)(I), C R S, specifically authorizes counties that have been issued an MS4 Permit
pursuant to Part 5 of Article 8 of Title 25, C R S , to adopt a stormwater ordinance to develop, implement and
enforce the Stormwater Management Program required by such permit
D Section 18-4-511, C R S , makes it a crime to place any foreign substance, whether solid or liquid, into any body
of water or watercourse
E Section 30-15-401(1)(a)(V), C R S , specifically provides that, in addition to the authority given counties under
Section 18-4-511, C R 5, the Board of County Commissioners is authorized to do all acts and make all
regulations which may be necessary or expedient for the promotion of health or the suppression of disease,
including the authority to restrain, fine and punish persons for dumping rubbish, including trash, junk and
garbage, on public or private property Public or private property is defined at Section 18-4-511, C R S , to
include "waters and watercourses "
F Section 16-13-305(1)(e), C R S , makes any unlawful pollution or contamination of any surface or subsurface
waters in this State a Class 3 Public Nuisance
(Weld County Code Ordinance 2019-05)
Sec. 8-9-30. Purpose/Intent.
A Weld County has been issued a Colorado Discharge Permitting System (CDPS) Phase II Municipal Separate
Storm Sewer System (MS4) permit (MS4 Permit) which is regulated by the Colorado Department of Health and
Environment (CDPHE) The MS4 Permit contains specific requirements with the intent of preventing the
discharge of pollutants to the MS4 Designated M54 areas include unincorporated areas of Weld County
serving a population between ten thousand (10,000) and one hundred thousand (100,000) with urban areas
of one thousand (1,000) or more people per square mile based on U S Census data
2Editor's note(s)—Ord No 2019-05, adopted June 17, 2019, amended article IX title and §§ 8-9-10-8-9-150 to
read as herein set out Former article IX pertained to Municipal Separate Storm Sewer System Illicit Discharge
Detection and Elimination and derived from Weld County Code Ordinance 2012-12
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 44 [EST]
Page 32 of 140
B Article objectives:
1. To regulate and prevent contributions of pollutants to the MS4 by any person;
2. To prohibit illicit connections and illicit discharges to the MS4;
3. To ensure MS4 Permit requirements for Construction Activity and Post -Construction are met;
4. To establish procedures to carry out the inspection, surveillance and monitoring nezessary to ensure
compliance with this Article; and,
5. To protect the health, safety and general welfare of the citizens of the County through the regulation of
nonstormwater discharges to the MS4.
(Weld County Code Ordinance 2019-05)
Sec. 8-9-40. Applicability.
The provisions of this Article shall apply in the unincorporated areas of the County located within, or
discharging to, the current or future designated MS4 area specified in the current MS4 Permit issued to the County.
Sec. 8-9-50. Definitions.
For the purpose of this Article, the following terms, phrases, words and their derivations shall have the
meanings given herein:
Best Management Practices (BMPs) means schedules of activities, prohibitions of practices, maintenance
procedures and other management practices to prevent or reduce the discharge of pollutants to the MS4.
BMPs also include treatment requirements, operating procedures and practices to control si:e runoff, spillage
or leaks, sludge or waste disposal, or drainage from raw material storage. The term BPAP may be used
interchangeably with the term "control measure."
Clean Water Act means the Federal Water Pollution Control Act (33 U.S.C. § 1251 et seq.), and any
subsequent amendments thereto.
Colorado Discharge Permit System (CDPS) means the State's system of permitting discharges (e.g.,
stormwater, wastewater) which corresponds to the federal NPDES permits under the Clean Water Act.
Common plan of development or sale means a contiguous area where multiple separate and distinct
construction activities may be taking place at different times, on different schedules, but remain related by a
common contract or plan. Contiguous means activities located in close proximity to each other (within 1/4 mile).
Examples may include subdivisions; master drainage plans and phased construction.
Construction activity means ground surface disturbing and associated activities (land disturbance), which
include, but are not limited to, clearing, grading, excavation, demolition, installation of new or improved haul
roads and access roads, staging areas, stockpiling of fill materials and borrow areas.
Construction dewatering permit means the Colorado Discharge Permitting System (CDPS) General Permit
C000870000, Construction Dewatering Discharges, which is regulated by the Colorado Depa rtment of Public
Health and Environment, Water Quality Control Division.
Construction stormwater permit means the Colorado Discharge Permitting System (CDPS) General
Permit COR400000, Stormwater Discharges Associated with Construction Activity, which is regulated by the
Colorado Department of Public Health and Environment, Water Quality Control Division.
Control measures mean temporary or permanent methods used to prevent or reduce the discharge of
pollutants to the MS4. Temporary control measures may be structural (silt fence, straw wat-les, straw bales,
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 33 of 140
earthen berms, soil retention blanket, etc.) or nonstructural (best management practices, good housekeeping,
etc.). Permanent control measures refer to water quality features built to detain, retain, filter, evaporate or
infiltrate stormwater runoff from a developed site.
Department of Public Health and Environment means the Weld County Department of Public Health and
Environment.
Department of Public Works means the Weld County Department of Public Works.
Disturbed area means the area of the land's surface disturbed by any work or activity upon the property
by means including, but not limited to, grading; excavating; stockpiling soil, fill or other materials; clearing;
vegetation removal; removal or deposit of any rock, soil, or other materials; or other activities which expose
soil. Disturbed area does not include agricultural land tillage.
Division means the Colorado Department of Public Health and Environment, Water Quality Control
Division.
Division's low risk discharge guidance documents means the documents created and amended by the
Colorado Department of Health and Environment, Water Quality Control Division, detailing the approved
conditions and methods of treating nonstormwater discharges.
Development area means the area of land disturbance, including past and future phasing. When multiple
lots are involved, such as a subdivision of land, the potential cumulative land disturbance will be considered
the development area for the purposes of drainage design.
Final stabilization means the condition reached when all ground surface disturbing activities at the site
have been completed, and a uniform vegetative cover has been established with an individual plant density of
at least seventy percent (70%) of pre -disturbance levels, or equivalent permanent, physical erosion reduction
methods have been employed.
Hazardous material means any material, substance, waste or combination thereof which, because of its
quantity, concentration, physical, chemical or infectious characteristics, may cause, or significantly contribute
to, a substantial present or potential hazard to human health, safety, property or the environment when
improperly treated, stored, transported, disposed of or otherwise managed.
Illicit connection means either of the following: any drain or conveyance, whether on the surface or
subsurface, which allows an illicit discharge to enter the MS4, including but not limited to any conveyance
which allows any nonstormwater discharge such as sewage, process wastewater and wash water to enter the
MS4, and any connection to the MS4 from indoor drains, sump pumps and sinks, regardless of whether said
drain or connection had been previously allowed, permitted or approved by the County or other governmental
authority; or any drain or conveyance connected from a commercial or industrial land use to the MS4 which
has not been documented in plans, maps or equivalent records and approved by the County or other
governmental authority.
Illicit discharge means any direct or indirect nonstormwater discharge to the MS4 which is not exempted
by this Article or applicable state or federal law.
Municipal Separate Storm Sewer System (MS4) means a conveyance or system of conveyances (including
roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels or
storm drains):
a. Owned or operated by the State, city, town, county, district, association or other public body
(created by or pursuant to state law) having jurisdiction over disposal of sewage, industrial wastes,
stormwater or other wastes, including special districts under state law, such as a sewer district,
flood control district or drainage district or similar entity, or a designated and approved
management agency under Section 208 of the Clean Water Act that discharges to waters of the
State;
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 34 of 140
b Designed or used for collecting or conveying stormwater,
Which is not a combined sewer, and
d Which is not part of a publicly owned treatment works
A map of the County's MS4 area is located in Appendix 8-E
MS4 Permit means the Colorado Discharge Permitting System (CDPS) General Permit COR090000,
Stormwater Discharges Associated with Municipal Separate Storm Sewer Systems (MS4s), which is regulated
by the Colorado Department of Public Health and Environment, Water Quality Control Division Weld County
is authorized to discharge under permit certification number COR090037
Nonstormwoterdischarge means any discharge to the storm drain system that is not composed entirely
of stormwater
Person means any individual, association, organization, partnership, firm, corporation or other entity
recognized by law and acting as the owner, owner's agent, operator or occupier of any premises subject to this
Article
Pollutant means anything which causes or contributes to pollution Pollutants may include, but are not
limited to paints, varnishes and solvents, oil and other automotive fluids, nonhazardous liquid and solid
wastes, yard wastes, including grass clippings and leaves, refuse, rubbish, garbage, litter or other discarded or
abandoned objects, accumulations that may cause or contribute to pollution, floatables, pesticides, herbicides
and fertilizers, hazardous substances and wastes, sewage, fecal coliform and pathogens, dissolved and
particulate metals, pet wastes, wastes and residues that result from constructing a building or structure,
concrete washout waste, wastes and residues that result from mobile washing operations, noxious or offensive
matter of any kind, and any soil, mulch, rock or other type of landscaping material
Pollution means the presence of any foreign substance (organic or inorganic) in water or wastewater
which, in sufficient concentration, tends to degrade its quality so as to constitute a hazard or impair the
usefulness or quality of the water to a degree which may not create an actual hazard to the public health, but
which does adversely and unreasonably affect such waters for domestic use
Potable water means any water which, according to recognized standards, is safe for human
consumption
Pollutant means anything which causes or contributes to pollution Pollutants may include, but are not
limited to paints, varnishes and solvents, oil and other automotive fluids, nonhazardous liquid and solid
wastes, yard wastes, including grass clippings and leaves, refuse, rubbish, garbage, litter or other discarded or
abandoned objects, accumulations that may cause or contribute to pollution, floatables, pesticides, herbicides
and fertilizers, hazardous substances and wastes, sewage, fecal bacteria and pathogens, dissolved and
particulate metals, pet wastes, wastes and residues that result from constructing a building or structure,
concrete washout waste, wastes and residues that result from mobile washing operations, noxious or offensive
matter of any kind, and any soil, dirt, mulch, rock or sand, wrecked or discarded equipment, heat, or any
industrial, municipal or agricultural waste
Post -Construction means the set of requirements applicable to any site or common plan of development
or sale which has disturbed greater than or equal to one acre or will cumulatively disturb greater than or equal
to one acre during future phasing
Pre -Construction means the set requirements applicable to any site or development prior to undergoing
construction activity
Premises means any lot, parcel of land or portion of land, whether improved or unimproved, and
including adjacent sidewalks and parking areas If improved, any associated buildings, facilities or
improvements thereupon are considered part of the premises
Created 2022-02-24 12 36 44 [EST]
(Supp No 76)
Page 35 of 140
Publicly owned treatment works means a publicly owned domestic wastewater treatment facility This
includes any publicly owned devices and systems used in the storage, treatment, recycling or reclamation of
municipal sewage or treatment of industrial wastes of a liquid nature It also includes sewers, pipes and other
conveyances if they are publicly owned or if they convey wastewater to a publicly owned treatment works
treatment plant
stormwater means any surface flow, runoff and drainage occurring during or following any form of
natural precipitation event and resulting therefrom; and consisting entirely of water from natural precipitation
events including snowmelt
Threatened discharge means a condition creating a substantial probability of harm, when the probability
and potential extent of harm makes it reasonably necessary to take immediate action to prevent, reduce or
mitigate damages to persons, property or natural resources
Watercourse means a natural or artificial channel through which stormwater or floodwater can flow,
either regularly or infrequently
Sec 8-9-60. Responsibility for administration.
The provisions of this Article are hereby vested in and shall be exercised by the Board of County
Commissioners, who may prescribe forms, rules and regulations in conformity with this Article or for proper
administration and enforcement Administration and enforcement of this Article and compliance with the County's
MS4 Permit are hereby delegated to the Department of Public Works, with the Public Works Director acting as a
duly authorized representative
Sec 8-9-70 Illicit discharges.
A Prohibitions
1 Illicit discharges
a It shall be unlawful for any person to discharge or cause to be discharged into the MS4 any
pollutants that cause or contribute to a violation of applicable water quality standards Subject to
Subsection D below and all applicable county, state or federal discharge regulations, only
stormwater may be discharged into the MS4
b It shall be unlawful for any person to cause pollutants to be deposited in such a manner or location
as to constitute a threatened discharge to the MS4 Pollutants that are no longer contained are
considered to be threatened discharges unless they are actively being cleaned up
2 Illicit connections
a The construction, use, maintenance or continued existence of illicit connections to the MS4 is
prohibited and is considered a violation of this Article
b This prohibition expressly includes, without limitation, illicit connections made in the past,
regardless of whether the connection was permissible under law or practices applicable or
prevailing at the time of connection
B Notification of discharges
1 Notwithstanding other requirements of law, as soon as any person who owns, occupies, operates or is
otherwise responsible for a premises, or is responsible for the emergency response for such premises,
has information of any known or suspected release of a nonstormwater or hazardous material discharge
to the MS4, said person shall take all necessary steps to ensure the discovery, containment and cleanup
of such release Additionally, such person shall be responsible for emergency suspension of all activities
Created 2022-02-24 12 36 44 [EST]
(Supp No 76)
Page 36 of 140
that are the cause of the release and shall implement corrective measures to mitigate and control
discharges
2 In the event of a release of hazardous materials to the MS4, said person shall immediately notify
emergency response agencies of the occurrence via emergency dispatch services In the event of a
nonstormwater discharge to the MS4, said person shall notify the Department of Public Works no later
than the next business day Notifications in person or by phone shall be confirmed by written notice
addressed and mailed to the Department of Public Works within three (3) business days of the phone
notice
3 If the discharge of hazardous material or nonstormwater emanates from a commercial or industrial
establishment, the owner, operator or occupier of such establishment shall also retain an on -site written
record of the discharge and the actions taken to prevent its recurrence Such records shall be retained
for at least three (3) years
C General requirements Requirements of this Section are co -regulated by the Department of Public Works and
the Department of Public Health and Environment
1 Control measures The County shall provide for, and compel the abatement of, any condition that causes
or contributes to a violation of this Article and require control measures for any activity which may cause
pollution or a threatened discharge to the MS4 The owner, operator or occupier, at his or her own
expense, shall provide reasonable protection from the potential discharge of pollutants to the MS4
through the use of structural and/or nonstructural, temporary and/or permanent control measures
Further, any person responsible for a premises which is, or may be, the source of an illicit discharge may
be required, at his or her own expense, to properly clean up the pollutant and implement control
measures to prevent the further or future discharge of pollutants to the MS4
2 Watercourse protection Every person owning, leasing or otherwise occupying premises through which
a watercourse passes shall keep and maintain that part of the watercourse within the premises free of
trash, debris, excessive vegetation and other obstacles that would pollute, contaminate or significantly
retard the flow of water through the watercourse Irrigation structures themselves are excluded In
addition, the owner, operator or occupier shall maintain existing privately -owned structures within, or
adjacent to, a watercourse so that such structures will not become a hazard to the use, function or
physical integrity of the watercourse
3 Leaks and spills Any leak or spill of hazardous material in an uncovered outdoor area shall be contained
to prevent the potential release of pollutants Leaks and spills shall be cleaned by dry sweeping, wet
vacuum sweeping, collection and treatment of wash water or other methods in compliance with this
Article Outdoor storage of liquid hazardous material or equipment containing liquid hazardous material
shall have adequate containment and management to prevent leaks and spills from occurring
4 Pesticides, herbicides and fertilizers Pesticides, herbicides and fertilizers shall be applied in accordance
with manufacturer recommendations and applicable laws State and federal regulations concerning
pesticide application shall be followed, and all required certifications shall be obtained
5 Sediment Stockpiles shall be adequately managed to prevent offsite discharge, and access points shall
be free of vehicle tracking Sediment discharge to the MS4 is considered a violation of this Article
D Exemptions
1 The following nonstormwater discharges are exempt from the discharge prohibitions established by this
Article when properly managed landscape irrigation, lawn watering, diverted stream flows, rising
groundwaters, uncontaminated groundwater infiltration, uncontaminated pumped groundwater,
springs, flows from riparian habitats and wetlands, water line flushing, discharges from potable water
sources, foundation and footing drains, air conditioning condensation, water from crawlspace pumps,
individual residential car washing, dechlorinated swimming pool discharges, water incidental to street
Created 2022-02-24 12 36 44 [EST]
(Supp No 76)
Page 37 of 140
sweeping (including associated sidewalks and medians) that is not associated with construction, dye
testing (in accordance with the manufacturer's recommendations), stormwater runoff with incidental
pollutants, discharges resulting from emergency firefighting activities, discharges authorized by a CDPS
or NPDES permit, and agricultural stormwater. Nonstormwater discharges will not be considered illicit
discharges if the discharge complies with the Division's Low Risk Discharge Guidance Documents.
Irrigation return flow is exempt under the Clean Water Act.
2 The Department of Public Works maintains the authority to determine proper management of all
nonstormwater discharges to the MS4. If a nonstormwater discharge is improperly managed or found to
contain significant levels of pollutants, access to the MS4 shall be suspended pursuant to Section 8-9-
130.
E Enforcement. Failure to comply with this Section is a violation of this Article, and enforcement procedures shall
be followed as detailed in Section 8-9-130.
(Weld County Code Ordinance 2019-05)
Sec. 8-9-80. Pre -construction.
A. Purpose. The purpose of this Section is to require the submittal and acceptance of specific documentation
prior to any land -disturbing activities to ensure construction activity and post -construction requirements of
the MS4 Permit are met. This Section applies to all land -disturbing activities commencing after July 1, 2019.
B Pre -construction requirements. The following documents are required to be submitted and accepted by the
Department of Public Works prior to any land -disturbing activity that will disturb greater than or equal to one
acre of land. Applicable land -disturbing activity includes the total disturbed area, either planned or potential,
from a common plan of development or sale. The Department of Public Works shall determine applicable sites
and required documentation necessary to comply with MS4 Permit requirements.
1. Grading permit. Within the designated MS4 area, it shall be unlawful for any person to conduct any
activity resulting in, or contributing to, a total disturbed area of greater than or equal to one acre without
first obtaining a grading permit from the Department of Public Works. A grading permit is also required
for sites less than one acre but are part of a larger common plan of development or sale.
2. CDPS construction stormwater permit or R -factor waiver. A CDPS construction stormwater permit shall
be obtained prior to the start of land disturbing activities. Alternatively, an R -factor waiver granted by
the Division may be utilized in lieu of obtaining CDPS permit coverage. Proof of permit certification or
waiver shall be required prior to grading permit issuance.
3 Stormwater Management Plan (SWMP). In accordance to the CDPS construction stormwater permit, a
SWMP shall be developed prior to land disturbing activities and located onsite until final stabilization,
available for staff review upon request by county, state or federal agencies.
4 MS4 site plans. In accordance with the MS4 permit, the following documents, collectively referred to as
"MS4 Site Plans", shall be reviewed and accepted by the Department of Public Works prior to land -
disturbing activity. MS4 site plan modifications made after acceptance shall be submitted to the
Department of Public Works for approval.
a. Sediment and Erosion Control Plan; identifying and locating all temporary control measures,
structural and non-structural, used during each phase of construction, from initial disturbance to
final stabilization, to prevent the discharge of sediment from the site. Additionally, the plan shall
include installation and implementation specifications for each structural control measure and a
narrative description of each non-structural control measure.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 38 of 140
b Stormwater Pollution Prevention Plan; identifying and locating all potential pollutants and the
temporary control measures, structural and non-structural, used during each phase of
construction, from initial disturbance to final stabilization, to prevent the discharge of pollutants
from the site. Additionally, the plan shall include installation and implementatior specifications for
each structural control measure and a narrative description of each non-structural control
measure.
At a minimum, pollutant sources associated with the following activities shall be addressed in the
plan:
i. Land disturbance and storage of soils;
ii. Vehicle tracking;
iii. Loading and unloading operations;
iv. Outdoor storage of construction site materials, building materials, fertilizers and chemicals;
v. Bulk storage of materials;
vi. Vehicle and equipment maintenance and fueling;
vii. Significant dust or particulate generating processes;
viii. Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents
and oils;
ix. Concrete truck and equipment washing;
x. Dedicated asphalt and concrete batch plants;
xi. Other areas where spills can occur; and
xii. Other nonstormwater discharges including construction dewatering not covered under the
CDPS construction dewatering permit and wash water not covered above.
c. Drainage report; identifying the following components: site drainage; design details for permanent
control measures; narratives for non-structural control measures, if applicable; and corresponding
calculations used in determining compliance with the "Base Design Standards" o: the MS4 permit.
"Base Design Standards" are detailed in the Weld County Engineering and Construction Criteria
document Manual :Appendix 8-Q, Sec. 6.2.6.2 - Permanent Water Quality Control Measure
Design. (Sec. 5.13, Stormwater Quality/MS4 Requirements).
d Drainage and access easements; identifying all easements or other legal means used to convey
drainage to permanent control measures and easements or other legal means used to access
permanent control measures for operations, maintenance and inspections.
e. Long-term operation and maintenance plan; identifying the long-term observation, maintenance
and operation of permanent control measures. The plan shall also include frequencies of routine
inspections and maintenance activities.
f Additional documents to comply with MS4 permit requirements; which shall be determined by the
Department of Public Works on a case -by -case basis.
C. Enforcement. Failure to comply with this Section is a violation of this Article and enforcement procedures shall
be pursued as detailed in Section 8-9-130. Additionally, a 'hold' may be placed on the applicable parcel's),
which prevents future permitting of the site until requirements are met.
(Weld County Code Ordinance 2019-05 )
Created: 2022-02-24 12:36:44 [EST]
(Su pp. No. 76)
Page 39 of 140
Sec. 8-9-90. Construction activity.
A. Purpose. The purpose of this Section is to require the implementation of temporary control measures during
land -disturbing activities to ensure construction activity requirements of the MS4 Permit are met. All control
measures shall be selected, installed, implemented and maintained in accordance with good engineering,
hydrologic and pollution control practices. This Section applies to all land -disturbing activities commencing
after July 1, 2019.
B Construction activity requirements. The following requirements are applicable to sites with construction
activity that will disturb greater than or equal to one acre of land. Applicable land -disturbing activity includes
the total disturbed area from a common plan of development or sale. The Department of Public Works shall
determine applicable sites and required procedures and documentation necessary to comply with MS4 permit
requirements.
1. Temporary control measures. Temporary control measures shall be implemented, according to the
accepted Sediment and Erosion Control Plan and Stormwater Pollution Prevention Plan, prior to the start
of construction activity and shall control all potential pollutants during each phase of construction until
final stabilization is achieved. If modifications to the plans are necessary, the owner or operator shall
submit the modification to The Department of Public Works for acceptance. Structural control measures
shall be maintained in operational condition. Corrective actions such as repairs and/or maintenance shall
be performed as soon as possible, immediately in most cases.
2 Construction inspections. Upon commencement of construction activity, the owner or operator shall
contact the Department of Public Works to schedule the required routine inspections of the site. County
shall inspect the site to verify compliance with the Sediment and Erosion Control Plan, Stormwater
Pollution Prevention Plan, and other submitted documentation. Inspection types and frequencies may
vary depending on the owner and/or operator's history of compliance. The Department of Public Works
maintains the authority to determine inspection frequency within the parameters of the MS4 permit
requirements. Inspections shall occur until the site reaches final stabilization, all temporary control
measures are removed, and the grading permit is released.
Inspection types and frequencies include, but are not limited to, the following:
a. Routine inspection: A routine (full -level) inspection is conducted at least every forty-five (45) days.
The site owner and/or operator must be present during the inspection.
b. Compliance inspection: A compliance inspection is conducted within fourteen (14) days of a
recorded violation. The scope of the inspection is determined by the severity of the violation.
Recurring compliance inspections may result in fees being assessed as detailed in Section 8-9-130.
ecy ninety (90) days. In -di -cater inspections do not requi-re the presence
ors with a history
of compliance.
dc. Inactive site inspection: An inactive site inspection is conducted at least every ninety (90) days.
Inactive site inspections are reserved for sites pending final stabilization, and all construction
activity has been completed.
Detailed inspection procedures can be found in the Weld County Engineering and Construction Criteria
Manual (Appendix 8-Q Sec. 6.2.5.1 - Stormwater Inspections).document (Sec. 5.13, Stormwater
Quality/MS4 Requirements.
C. Exemptions. R -factor waiver. Sites which have obtained an R -factor waiver from CDPHE are exempt from the
requirements of this Section. However, the owner remains responsible for implementing adequate control
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 40 of 140
measures to prevent illicit discharges during construction activity. The Department of Pubic Works reserves
the right to require the submittal of necessary documents, such as an Erosion and Sediment Control Plan and
Stormwater Pollution Prevention Plan, to prevent the discharge of pollutants to the MS4 on a case -by -case
basis. Additionally, the R -factor waiver exemption for construction activity is not applicable to post -
construction requirements in Section 8-9-100.
D Enforcement. Failure to comply with this Section is a violation of this Article and enforcement procedures shall
be pursued as detailed in Section 8-9-130. Additionally, a 'hold' may be placed on the applicable parcel(s
which prevents future permitting of the site until requirements are met.
(Weld County Code Ordinance 2019-05)
Sec. 8-9-100. Post -construction.
A. Purpose. The purpose of this Section is to require the implementation and maintenance of permanent control
measures_ after apf+Eable construction activity to ensure post -construction requirements of the MS4 permit
are met. All control measures shall be selected, installed, implemented and maintained it accordance with
good engineering, hydrologic and pollution control practices. This Section applies to all land -disturbing
activities commencing after July 1, 2019.
B. Post -construction requirements. The following requirements are applicable to sites for which construction
activity /las createdwill create a disturbed area greater than or equal to one acre and sites which will have a
cumulative disturbed area greater than or equal to one acre during future phasing. The requirements are
applicable to individual sites as well as sites that are part of a larger common plan of development or sale. For
subdivisions, the potential development area will be considered unless otherwise platted. The Department of
Public Works shall determine applicable sites and required procedures and documentation necessary to
comply with MS4 permit requirements.
1. Permanent control measures.
a. In accordance with the MS4 permit, discharges from applicable sites shall ensure water quality
treatment of runoff through the implementation of permanent control measures, designed in
accordance with the "Base Design Standards" detailed in the MS4 permit.
b "Base design standards" can be found in the Weld County Engineering and Construction Criteria
document (Section 5.13, Stormwater Quality/MS4 Requirements).Manual 'Appendix 8-Q, Sec.
6.2.6.2 - Permanent Water Quality Control Measure Design).
c Permanent control measures implemented for compliance with this Section shall be located within
the jurisdiction of Weld County until annexed by a municipality.
2. As -built submittal.
a. After II I complete construction of drainage is
complete, a certified as -built drawing, signed and stamped by a Professional Surveyor and licensed
Professional Engineer in the State of Colorado, shall be submitted to the Department of Public
Works to be recorded.
3 Final inspection and acceptance.
a. After receiving the as -built, the County shall inspect the site to verify compliance with the Drainage
Report, Drainage and Access Easements, Long -Term Operation and Maintenance Plan, and other
submitted documentation. If the Department of Public Works determines the site has met the
requirements of this Section, the site will be allowed to obtain a Certificate of Occupancy (CO).
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 41 of 140
Otherwise, the parcel will remain on hold until all requirements have been met. owner will be
ithin ten (10) business days.
4 Post -acceptance oversight.
a. Inspections of permanent control measures. Inspections shall be conducted at least every five (5)
years, or an alternative frequency determined by the Department of Public Works, to ensure
adequate long-term operation and maintenance of permanent control measures. The County
Inspector shall verify the permanent control measure with the recorded as -built and long-term
operation and maintenance plan. If the inspector is unable to visually verify adequate functioning
and maintenance of the permanent control measure, additional requirements may apply.
Additional requirements may be avoided by installing structural components, such as a concrete
trickle channel, which allows visual verification of adequate functioning and maintenance.
b. Additional requirements.
i. A survey of the permanent control measure, performed by a Professional Land Surveyor,
may be required to verify volume capacity with the recorded as -built drawings.
ii. The volume of the permanent control measure, calculated from the survey, may be required
to verify capacity with the recorded as -built. The report confirming adequate storage
capacity of the permanent control measure shall be signed and stamped by a licensed
Professional Engineer in the State of Colorado.
iii. Alternative methods used to meet the intent of this Section may be allowed on a case -by -
case basis. Allowable methods shall be determined by the Department of Public Works.
5 Change of ownership.
a. Upon sale of the property, the obligations to maintain permanent control measures shall be a
covenant running with the land in perpetuity for the benefit of the County.
C. Exemptions.
1. The MS4 permit allows for specific exemptions to post -construction requirements. However, the
Department of Public Works shall review and accept each exemption prior to use. Use of an exemption
without prior acceptance by the Department of Public Works is a violation of this Article.
2 A list of allowable exemptions under the MS4 permit can be found in the Weld County Engineering and
Construction Criteria Manual (Appendix 8-Q1 Sec. 6.2.6.1 - Exemptions'. document (Section 5.13,
The most common exemptions are as follows;:
a Large -Lot Single -Family Sites: A single-family residential lot, or agricultural zoned lands, greater
than or equal to 2.5 acres in size per dwelling and having a total lot impervious area of less than 10
percent. A total lot imperviousness greater than 10 percent may be allowed when a study specific
to the watershed demonstrates the expected soil and vegetation conditions are suitable for
infiltrationjfiltration of the WQCV for the site. The maximum total lot impervious covered under
this exclusion shall be 20 percent.
b. Undeveloped Land: Sites with land disturbance to undeveloped land (land with no human -made
structures such as buildings or pavement) that will remain undeveloped.
c. Above Ground and Under&round Utilities: Activities for installation or maintenance of underground
utilities or infrastructure that does not permanently alter the terrain, ground cover, or drainage
patterns from those present prior to the construction activity. This exclusion includes, but is not
limited to, activities to install, replace, or maintain utilities under roadways or other paved areas
that return the surface to the same condition.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 42 of 140
Enforcement.
1. Failure to comply with this Section is a violation of this Article and enforcement procedures shall be
pursued as detailed in Section 8-9-130. Additionally, noncompliance may result in an 'MS4 hold' may be
placed on the applicable parcel{s), which prevents future permitting of the site until the parcel's
requirements are met.
(Weld County Code Ordinance 2019-05 )
Sec. 8-9-110. CDPS permitted discharges.
A. Any person issued a CDPS permit certification for activities taking place within the designated MS4 or
discharging to the MS4, shall comply with all provisions of such permit. Proof of compliance with such permits
may be required in a form acceptable to the Department of Public Works prior to allowing discharges to an
MS4.
(Weld County Code Ordinance 2019-05 )
Sec. 8-9-120. Access to premises.
The purpose of this Section is to gain access to a premises for illicit discharge investigations, construction
activity inspections and post -construction inspections. This Section applies to all premises within unincorporated
Weld County that are, or may be, discharging to the MS4.
A. The Department of Public Works shall be allowed to enter and inspect any premises subject to this Article
as often as may be necessary to determine compliance. If security measures are in force requiring proper
identification and clearance before entry into the premises, the owner, operator or occupier shall make
the necessary arrangements to allow access to Department of Public Works personnel
B Premises owners, operators or occupiers shall allow Department of Public Works personnel ready access
to all parts of the premises for the purposes of inspection, sampling, examination and copying records
that must be kept under the conditions of any CDPS permit, and any additional duties required to
determine compliance with this Article or applicable state and federal law.
C. Any temporary or permanent obstruction to safe and easy access to the premises to be inspected and/or
sampled shall be promptly removed by the owner, operator or occupier at the written or oral request of
the Department of Public Works and shall not be replaced. The costs of clearing such access shall be
borne by the owner, operator or occupier.
D Refusal to allow, or unreasonable delays in allowing, the Department of Public Works access to the
premises for the purpose of conducting any activity authorized or required by this Article shall be a
violation of this Article.
E If the Department of Public Works has been refused access to any part of the premises from which
discharges occur or may occur, and the Department of Public Works is able to demonstrate probable
cause to believe that there may be a violation of the MS4 permit and/or this Article or that there is a
need to inspect and/or sample as part of a routine inspection and sampling program designed to verify
compliance with the MS4 permit or this Article, or to protect the overall public health, safety and welfare
of the community, then the Department of Public Works may seek issuance of a search warrant from
any court of competent jurisdiction.
F The Department of Public Works shall have the right to set up on the premises such devices as are
necessary in the opinion of the Department of Public Works to conduct monitoring and/or sampling of
discharges.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 43 of 140
G The Department of Public Works has the right to require the owner, operator or occupier to install
monitoring equipment as necessary. The owner, operator or occupier shall, at his or her own expense,
maintain at all times, in safe and proper operating condition, the sampling and monitoring equipment.
All devices used to measure discharge or water flow and quality shall be calibrated to ensure their
accuracy.
Sec. 8-9-130. Enforcement procedures.
A. Emergency suspension of MS4 discharge access. The Department of Public Works may, without prior notice,
seek the suspension of MS4 discharge access to a person and/or premises when such suspension is necessary
to stop an illicit discharge or threatened discharge which presents, or may present, imminent and substantial
danger to the environment, to the health or welfare of persons or to the MS4. If the violator fails to comply
with a suspension order issued in an emergency, the Department of Public Works may take such steps as
deemed necessary to prevent or minimize damage to the MS4 or to minimize danger to persons.
A person commits an offense if the person reinstates MS4 access to premises terminated pursuant to this Section
without the prior approval of the Department of Public Works.
B. Informal notice of violation. Except where a threatened discharge exists and/or emergency suspension is
necessary, the Department of Public Works shall attempt to provide an initial informal notice to a person
✓ iolating this Article. Such notice shall specify the location, type and severity of the violation and request that
such person take immediate action to address the violation. Notices of violation are followed by compliance
inspections to ensure the violation has been resolved. Failure to correct the violation within the specified time
vv -FP -may result in a formal notice of violation. In the event reasonable efforts to communicate the informal
n otice to such person are unsuccessful, a formal notice of the violation shall be issued by the Department of
Public Works.
Causes for informal notices of violation include, but are not limited to:
1. Minor issues of'improper handling, storage or disposal of potential stormwater pollutants;
2. Inadequate or improperly maintained temporary control measures at a construction site, either active
or inactive; and/or
3. Required routine maintenance of a permanent control measure.
C. Formal notice of violation. If the violation for which informal notice was given has not been resolved within
fourteen (14) days of such notice, and no plan for corrective action has been communicated, and except where
e mergency suspension is necessary, the Department of Public Works shall provide a formal notice of violation
to persons violating this Article. Formal notices of violation are also issued for recurring violations and/or
✓ iolations more severe in nature. Notices of violations are followed by compliance inspections to ensure the
violation has been resolved. Recurring violations may result in fees being assessed in accordance with Section
8-9-140 and/or enforcement methods being pursued in accordance with Section 8-9-150.
Causes for formal notices of violation include, but are not limited to:
1. Illicit discharges or threatened discharges to the MS4;
2. Construction commencing without a grading permit and/or MS4 site plan acceptance;
3. Construction commencing without notifying the Department of Public Works to schedule routine
inspections;
4. Failure to implement adequate control measures at a construction site;
5 Recurrent violations, such as inadequate or improperly maintained control measures, at a construction
site,
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 44 of 140
6. Failure to complete corrective actions from previous construction inspections;
7 Failure to install permanent control measures at a site that has cumulatively disturbed greater than or
equal to one acre;
8. Inadequate functioning, improper use or removal of a permanent control measure, and/or
9. Failure to submit required documents confirming adequate storage capacity and/or functioning of a
permanent control measure.
Such notice shall describe the nature of the violation and may require without limitation:
1. That monitoring, analyses and reporting be performed;
2. That illicit connections and/or illicit discharges be abated;
3. That stormwater pollution be remediated and/or potential pollutant sources be abated and any affected
property be restored; and/or
4. That source control or treatment control measures be implemented.
If abatement of a violation and/or restoration of affected property are required, the notice shall set forth a
reasonable deadline within which such remediation and/or restoration must be completed. The written notice of
violation shall be served by email or hand delivery or by certified mail, return receipt requested.
Any person receiving a formal notice of violation may appeal the determination of the Department of Public Works
to the Board of County Commissioners. The notice of appeal must be received within fifteen (15) days from the date
of the formal notice of violation. A hearing on the appeal before the Board of County Commissioners shall take place
within fifteen (15) days from the date of receipt of the notice of appeal. The decision of the Board of County
Commissioners shall be final.
If the violation has not been corrected pursuant to the requirements set forth in the formal notice of violation or, in
the event of an appeal on or after the fifteenth day after the decision of the Board of County Commissioners
upholding the decision of the Department of Public Works, the Department of Public Works may pursue an
administrative entry and seizure warrant for abatement pursuant to Section 30-15-401(11), C.R.S., in addition to any
other available civil or criminal enforcement pursuant to Section 8-9-150 below.
Administrative entry and seizure warrant for abatement. If the time specified for abatement in the written notice of
violation has expired, or on or after the fifteenth day after an unsuccessful appeal of the written notice of violation,
the Department of Public Works may petition the court for an administrative entry and seizure warrant for
abatement pursuant to Section 30-15-401(11), C.R.S. The Board of County Commissioners may assess the costs of
the abatement specified in Section 30-15-401(11), C.R.S., and such costs shall become a lien against the property
from which the causes of violation have been remediated, as further described in Section 8-9-140 below.
Sec. 8-9-140. Collection of costs.
A. Costs for compliance inspections may be assessed at an hourly rate or an amount reasonable to minimize the
occurrence of recurrent violations.
B Cost of abatement may be assessed. Upon notice to, and failure of, the property owner, operator, occupier or
other responsible party to abate or mitigate the discharge of pollutants, the Department of Public Works may
perform the work needed to comply with this Article. The whole cost thereof, including five percent (5%) for
inspection and other incidental costs in connection therewith, shall become an assessment upon the property
from which such condition has been abated or remediated. The Department of Public Works shall keep a
written record of all such costs, which shall be part of the file for the County's Stormwater Management
Program required by the MS4 Permit.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 45 of 140
C Assessment becomes lien Any assessment pursuant to this Article shall, once recorded, be a lien against such
property until paid and shall have priority based upon its date of recording In case such assessment is not paid
within sixty (60) days after notice is mailed to the property owner, it may be certified by the County Clerk and
Recorder to the County Treasurer, who shall collect the assessment, together with a ten -percent penalty for
the cost of collection, in the same manner as other taxes are collected The laws of the State for assessment
and collection of general taxes, including the laws for the sale and redemption of property for taxes, shall apply
to the collections of assessments pursuant to this Article
(Weld County Code Ordinance 2019-05 )
Sec. 8-9-150. Enforcement and penalties for unabated violations.
A Criminal prosecution Any person who has violated or continues to violate this Article shall, in addition to any
enforcement action authorized by this Article, be liable to criminal prosecution to the fullest extent of the law
and shall be subject to a criminal penalty authorized pursuant to Articles 15 and 35, Title 30, C R S , and any
other applicable law The County may recover all attorneys' fees, court costs and other expenses associated
with enforcement of this Article, including but not limited to sampling and monitoring expenses
B Violations deemed a public nuisance In addition to the enforcement processes and penalties provided, any
condition caused or permitted to exist in violation of any of the provisions of this Article is a threat to public
or environmental health, safety and welfare, is declared and deemed a nuisance and may be summarily abated
or restored at the violator's expense, and/or a civil action to abate, enjoin or otherwise compel the cessation
of such nuisance may be taken
(Weld County Code Ordinance 2012-12 , Weld County Code Ordinance 2019-05 )
Sec. 8-9-160. Remedies not exclusive.
The remedies listed in this Article are not exclusive of any other remedies available under any applicable
federal, state or local laws It is within the discretion of the Department of Public Works to seek cumulative remedies
Sec. 8-9-170 Severability.
The provisions of this Article are hereby declared to be severable If any provision, clause, sentence or
paragraph of this Article, or the application thereof to any person, establishment or circumstances, shall be held
invalid, such invalidity shall not affect the other provisions or application of this Article
ARTICLE X Reserved'
ARTICLE XI. Storm Drainage Criteria
Division 1 General Provisions
3Editor's note(s)—Ord No 2019-05 , adopted June 17, 2019, repealed §§ 8-10-10-8-10-30, which pertained to
Construction Site Stormwater Regulation and derived from Weld County Code Ordinance 2005-9
Created 2022-02-24 12 36 44 [EST]
(Supp No 76)
Page 46 of 140
Sec. 8-11-10. Intent.
A. The intent of the Weld County S chapter is to provide minimum standards to preserve
and protect the public health, safety and general welfare in the unincorporated lands of the County, pursuant
to authority granted by Part 4 of Article 15 of Title 30, and Article 35 of Title 30, C.R.S.
B. Adequate stormwater management is necessary to preserve and promote the health, safety, general welfare,
and economic well-being of the County. Drainage is a regional issue involving multiple governmental
jurisdictions and affecting all property parcels. This makes it especially critical for drainage systems and
programs to address both public and private needs. The County should be directly involved to provide
coordination and master planning for area -wide drainage facilities.
C Drainage plans should adhere to generally accepted engineering principles and practices and shall conform to
applicable laws and regulations. Development shall consider the features and functions of the existing drainage
system.
D. Application of these policies is supported by technical drainage criteria and data. When designed and
implemented in a comprehensive manner, drainage facilities can be provided in a manner that will avoid
water -related damage to infrastructure, maintain or improve water quality, and enhance the health, safety,
and general welfare of the County.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-20. Definitions.
For the purpose of this article, the following terms, phrases, and words and their derivations shall have the
meanings given herein:
Control Measures (formerly Best Management Practices/BMPs): For the purposes of this Article, temporary or
permanent erosion and sediment control methods that have been determined (according to EPA guidance) to be
the most effective, practical means of preventing or reducing pollution from nonpoint sources. For the purposes of
this Article, control measures address prevention of water pollution and control of dust from construction sites.
Detention pond: A flood control feature designed to temporarily store runoff and reduce peak flows. Detention
ponds return water to the watershed through an outlet designed to release at a specified rate.
Municipal Separate Storm Sewer System (M54): An area defined by the Federal Environmental Protection
Agency (EPA) in 40 CFR 122 as defined in Chapter 8, Article IX of this code.
Non -Urbanizing: An area farther than 1/4 mile from municipal boundaries, as amended.
Retention pond/Stormwater Infiltration facility: A flood control feature designed to temporarily store
stormwater runoff and reduce peak flows. Retention ponds return water to the watershed through infiltration into
the ground.
Urbanizing: An area within 1/4 mile from municipal boundaries, as amended.
Sec. 8-11-30. Adoption of storm drainage standards.
A. The Mile HighUrban Drainage and Flood Control District's "Urban Storm Drainage Criteria Manual,"
(MHUDFCDMHFD Manual) consisting of Volume 1, Volume 2, and Volume 3, as currently published or
hereafter amended, is hereby adopted by reference, with the amendments and additions which are set forth
herein. All references to "District" or "The District" within the MHUDFCDMHFD Manual shall be replaced with
'Weld County". T uounty Storm Dral-nage Criteria." All
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 47 of 140
facilities for stormwater management on properties located within the unincorporated lands of the County,
whether public or private, shall be designed and constructed in accordance with such criteria, unless a master
drainage plan specific to the area of the site has been approved by the County. The Weld County Storm
on the Weld County -Pub -14c Works Department's Website.
B The criteria and procedures contained in this article are intended to supplement the UDMHFCD Manual in
ways specific to Weld County. In the case of a conflict between the UDMHFCDMHFD Manual and the
supplemental criteria and procedures in this article, such supplemental criteria and procedures shall take
precedence over the UDMHFCD Manual.
C Further guidance for storm water design and construction shall be in accordance with Chapter 5 of the Weld
County Engineering and Construction Criteria.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-40. Drainage policy.
A. Weld County pursues a jurisdictionally unified drainage effort to assure an integrated drainage system and to
cooperate with other regional and local planning agencies on drainage matters.
B. For new development, un-detained discharges to roadside ditches located in the County road right-of-way are
prohibited.
C. Except as set forth below, Weld County requires regional and/or on -site detention for all future developments.
Temporary or interim detention/retention may be required if the downstream regional facilities have not yet
been constructed per the applicable master plan for that location. Stormwater retention facilities are normally
not allowed in Weld County but will be considered for special circumstances through the variance process as
defined in this article.
D Weld County requires detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and
release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped
site for urbanizing areas and the historic runoff rate of the 1 -hour, 10 -year storm falling on the undeveloped
site for non -urbanizing areas. Historic is defined as an undeveloped site with a 2.0% imperviousness. If an
urbanizing jurisdiction has adopted a different historic runoff rate than that stated in this subsection, then the
most restrictive runoff rate shall apply.
i
E. Public WorksWeld County shall review and approve new development in accordance with the storm drainage
criteria of this article.
F Weld County will not accept any detention or retention pond that does not drain in accordance with state and
federal law or causes injury to water rights. Upon evaluation, improvements may be necessary to downstream
capacity.
G. Irrigation ditches shall not be used as outfall points for stormwater runoff from Uses by Special Review, Site
Plan Reviews, Subdivisions, }r Planned Unit Developments, or WOGLAs unless such use is approved, in writing,
by the ditch owner(s). Water quality treatment may be required.
H. An as -built survey of stormwater facilities shall be provided if requested by Public WorksWeld County.
Section 8-11-45 Exceptions
A. Exception criteria. Exceptions to stormwater detention shall not jeopardize the public health, safety, and
welfare of public and private property. No stormwater detention will be required for sites that meet any of
the following conditions. Requirements of the Municipal Separate Storm Sewer System (MS4) areas remain
applicable. Public WorksWeld County will confirm if the development qualifies for an exception based upon
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 48 of 140
the information provided by the applicant. Exceptions requests shall be supported with an approved drainage
narrative, which must describe the following at a minimum criteria:
1. The exception being requested for considerationAny existing and proposed improvements to the
property
2. Any existing and proposed improvements to the property. The exception being requested for
consideration.
3. Where the water originates if it flows onto the property from an off -site source.
4. Where the water flows as it leaves the property.
5. The direction of flow across the property.
6. Previous drainage problems with the property, if any.
7. The location of any irrigation facilities adjacent to or near the property.
8. Any additional information pertinent to the development.
B. Exceptions. There may be uses Uses that can be Excepted excepted from the requiring stormwater detention,
which shall be are limited to the following uses:
1. Use by Right or Accessory Use in the A (Agricultural) Zone District.
2. Zoning Permits for accessory storage, commercial vehicles, home occupations, or mar ufactured homes
in the A (Agricultural) Zone District.
3. A second dwelling permit in the A (Agricultural) Zone District.
4. Towers including, but not limited to, wind and telecommunication towers.
5 Pipelines or transmission lines, excluding laydown yards, metering sites, substations, and any other
above ground appurtenances.
6 Gravel pits if the stormwater drains into the gravel pit. Releases from the site shall comply with the Weld
County Storm DrainageEngineering and Construction Criteria, including dewatering. Topographical
information shall be provided.
7 esidential developments with no historic flooding where all the following conditions exist. This
exception shall be supported by calculations provided by the Applicant. Additional information may be
requested and will be signed and stamped by a Colorado Licensed Professional Engineer:
a) Nine (9) lots or fewer.
b) The average minimum lot size is equal to, or greater than, three (3) acres per lot.
Downstream roadway overtopping criteria are not exceeded.
d) The total post -development imperviousness for the rural residential development does not exceed
ten percent (10%), assuming that all internal roads and driveways are paved,
paved
8 Development of sites where the change of use does not increase the imperviousness of the site. Note:
tThis exception cannot be applied to sites where impervious surfaces were added for, ar in conjunction
with, a business that is/was operating in violation andf or without the required Weld County land use
permit. a and has been
lation of the Weld Coun
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 49 of 140
9. Non Urbanizing areas where the total pre existing and post development impervious area produces
exception s -a I be supported by ca culations signed and stamped by a Colorado Licensed Professiona-
Engineer. A parcel of land or project site where the "total
developed stormwater runoff" from the 100 -year, 1 -hour storm is less than, or equal to, five
(5) cfs. The "total developed stormwater runoff" includes cumulative runoff from the
proposed project site plus runoff from any previously developed project site on the subject
parcel. A project site is the area of land that lies within the project's limits of disturbance
during construction. This exception shall be supported by calculations signed and stamped by
a Colorado Licensed Professional Engineer.
10. In -fill development parcels with total area less than, or equal to, one (1.0) gross acre.
11. An individual parcel with an unobstructed flow path and no other parcel(s) between the
channel within a Federal Emergency Management Administration (FEMA) regulatory floodplain
channel and the project.
12. A parcel greater than one (1) gross acre and less than, or equal to, five (5) gross acres in size is
allowed a onetime exception for a new two four thousand (24 000) sq. ft.-uil•dingof 100%
impervious area or equivalent imperviousnessness (See Appendix 8-Q in the Weld County
Engineering and Construction Criteria Manual for impervious value percentages).
13. A parcel greater than five (5) gross acres in size is allowed a onetime exception for a new
ninefe-u`r thousand five hundred (4,59,000) sq. ft. lausikfingof 100% impervious area or
equivalent imperviousness (See Appendix 8-Q in the Weld County Engineering and
Construction Criteria Manual for impervious value percentages).
14. Concentrated Animal Feeding Operation (CAFO), Animal Feeding Operations (AFO) and Housed
Commercial Swine Feeding Operation (HCSFO) which are covered and approved by the
Colorado Discharge Permit System (CDPS) regulations. Portions of the site not included or
covered by the CDPS permit, shall comply with the Weld County Storm Drainage Criteria.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-50. Rainfall.
The designer shall use the most appropriate and best available data for the project area in determining the
rainfall quantities. The applicant shall utilize local rainfall data from the National Oceanic and Atmospheric
Administration (NOAA) unless otherwise approved by Public WorksWeld County. The use of synthetic rainfall
distribution data is not permitted.
Sec. 8-11-60. Runoff.
A. The Rational Method should not be used to determine runoff for basins larger than one hundred sixty (160)
acres. In areas located in the southwest portion of Weld County, where areas are larger than one hundred
sixty (160) acres SWMM is required. tiat lave crainageciaracteristics Simi-ar to an -urban area, tie Co oraeo
can be used for basins from zero
0) to t
free t
larger than one hundred sixty (160) acres.
-iousanc (3,000) acres. The parameter adjustments provides in
could be used when do
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 50 of 140
B. The CUHP model is not applicable in non urban areas, including those areas in Weld County that arc outside
lic Works may accept other methodologies as deemed appropriate by
the design engineer.
(Weld County Code Ordinance 2019-12 )
Sec. 8-11-70. Street drainage for use by special review, commercial, industrial, planned unit
development and residential subdivisions.
A. Design Depth Criteria. The primary design objective is to keep the encroachment of stormwater on the street
or road below an acceptable limit for a given flood return period. When stormwater collects on a street and
flows down a gutter or swale, the stormwater encroaches into the roadway. If lef: unchecked, the
encroachment will hinder traffic flow and may become hazardous. The maximum encroachment depth over
the crown is 6" during the 10 -year storm and 18" during the 100 -year storm. County Highways and arterial
roadways overtopping shall be determined by the Public Works Director or Designee.
B Inlets.
1. The design guidelines provided in the streets/inlets/storm sewers chapter of the UDFCDMHFD Manual
(Volume 1) should be used when designing stormwater inlets. The standard inlets permitted for use in
Weld County streets/roads are shown in the following table:
Inlet type permitted (CDOT Types)
Curb
opening
inlet
Type
R
All
street
types
with
6 -inch
vertical
curb
Grated
inlet
Type
C
All
streets
with
a roadside
ditch
or swale
Grated
inlet
Type
13
Alley
or
private drives
with
a valley
gutter
Combination
inlet
Type
13
All
street
types
with
6 -inch
vertical
curb
2. In order to account for factors, which decrease the capacity of the inlets such as debris plugging,
pavement overlaying, and variations in design assumptions —the theoretical capacity calculated for inlets
is to be reduced by the factors presented in the following table for standard inlets in Weld County.
Condition
Inlet
Type
Percent of
Allowed
Theoretical
Capacity
Sump
or continuous
grade
CDOT
Type
R
5
ft
length
88
92 .
10
ft length
15
ft length
95
Continuous
grade
Combination
Type 13
66
Sump
Grated
Type
C
50
Grated
Type
13
50
Combination
Type
13
65
C. Pipes.
1. The design guidelines provided in the streets/inlets/storm sewers chapter of the UDFCDMHFD Manual
(Volume 1) should be used when designing stormwater pipes.
2. The applicant shall contact the Department of Public Works to determine which types of storm sewer
pipes are permissible for use in public rights -of -way or public drainage easements.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 51 of 140
(Weld County Code Ordinance 2019-12)
Sec. 8-11-80. Major drainage.
A. Design Flows. The major drainage system must be able to convey the fully developed flow from a watershed
for the 1 -hour, 100 -year event without significant damage to the system.
B. Open Channel Design Principles.
1. Grass -lined open channels conveying less than fifty (50) cfs may reduce the minimum 1.0 -foot freeboard
requirement to the freeboard required to convey 1.33 times the 100 -year design flow. The reduced
freeboard may only occur if a 1.0 -foot minimum freeboard is not physically possiblepossible, and
calculations are a variance request is submitted and accepted by Weld County.
2 Maximum side slopes may be as steep as 3H:1V. If slopes are greater than 4H:1V the design engineer
should address how the channels will be safely maintained.Generally, channels and swales should be no
steeper than 4:1. If steeper slopes are required due to site constraints, the design engineer shall address
how the channel will be maintained.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-90. Culverts inpublic-County road right-of-way.
A. Sizing.
1. The applicant shall contact `he
storm sewer pipes are permissible for use in public County road rights -of -way or public drainage
easements.
Weld County to determine which types of
2. Culverts shall be designed to the following maximum headwater to depth HW/D requirements.
Range of
Diameter or
Height
or Rise, Inches
Maximum
HW/D
Less than
36 inches
2.0
36 inches
to 60 inches
1.7
Larger than
60 inches
but less
than
84 inches
1.5
84 inches
to less
than
120
inches
1.2
120 inches
or larger
1.0
B Materials. Culverts that are to be installed in a public County road right-of-way that is routinely burned must
be made of either concrete or metal. Plastic pPipes made of flammable materials (such as PVC or HDPE} will
not be allowed in public County road rights -of -way that are subject to weed burning.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-100. Storage.
A. Detention Criteria.
1. Detention ponds shall be sized to store the stormwater runoff generated by the 1 -hour, 100 -year storm
falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour,
5 -year storm falling on the undeveloped site for urbanizing areas and the historic runoff rate of the 1-
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 52 of 140
hour, 10 -year storm falling on the undeveloped site for non -urbanizing areas. Historic is defined as an
undeveloped site with a 2.0% imperviousness.
2. The detention pond must include volume for the water quality capture volume. Water quality capture
volume may be included as a portion of the total 100 -year detention pond volume. The water quality
capture volume is to be drained over forty (40) hours.
3. Off -site flows can be routed over the spillway or routed around the site.as follows:
a. Over the spillway; or
b. Routed around the site.
4. The elevation of the top of the detention pond embankment, except at the spillway, mast be a minimum
of 1 -foot of freeboard above the 100 -year water surface elevation in the detention pond.
5 Outlet works structures should be sized and structurally designed to release at no more than the 1 -hour,
5 -year historic release rate in urbanizing drainage areas and 1 -hour, 10 -year historic release rate in non -
u rbanizing drainage areas without structural or hydraulic failure. Historic is defined as an undeveloped
site with a 2.0% imperviousness. The outlet pipe must contain a minimum of two concrete cutoff walls
e mbedded a minimum of eighteen (18) inches into undisturbed earthen soil. The cutoff walls must be a
minimum of eight (8) inches thick. The outlet pipe bedding material must consist of native earthen soil,
n ot granular bedding material, to at least the first downstream manhole or daylight point.
6 Each detention pond shall contain an emergency spillway capable of conveying the peak 100 -year storm
discharge draining into the detention pond. The invert of the emergency spillway must be equal to, or
above, the 100 -year water surface elevation. The depth of flow out of the emergency spillway shall be
six (6) inches or less. The spillway must have effective erosion protection. In order to protect the
e mergency spillway from catastrophic erosion failure, buried or grouted riprap shall be placed from the
e mergency spillway downhill to the embankment toe of slope and covered with six (6) inches of topsoil,
if buried. The riprap must be sized at the time of final engineering design. Grouting of the riprap may be
required.
7 In order to prevent damage to publicly owned infrastructure (roads, roadside ditches), aA concrete
cutoff wall eight (8) inches thick, three (3) feet deep, and extending a minimum of five (5) feet into the
e mbankment on each side of the emergency spillway opening, is required on all privately -maintained
detention ponds and required on all regional detention ponds. The concrete cutoff wall permanently
defines the emergency spillway opening. The emergency spillway elevation must be tied back into the
top of the embankment using a maximum slope of 4:1.
8. The design of the detention facility must provide evidence that the pond will drain in accordance with
C.R.S. 37-92-602(8), as amended. A detention pond that can cause injury to water rights or is in violation
of State or Federal law will not be accepted.
9. Simplified full spectrum equations are not to be used to calculate the required volume of a detention
pond.
B. Retention Criteria.
1. Retention facilities are not allowed in Weld County without the issuance of a variance.
2. Retention facilities must be designed to contain 1.5 times the volume of the runoff generated by the
twenty -four-hour, 100 -year storm, plus one (1) foot of freeboard.
3 The design of the retention facility must include an emergency spillway and must show that a spill will
not adversely impact downstream properties or residences. The spillway must be designed in accordance
with the detention pond spillway requirements.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 53 of 140
4. The design of the retention facility must provide evidence that the pond will drain through the bottom
(sides slopes cannot be used in calculation) in accordance with C.R.S. 37-92-602(8), as amended, when
only draining through the bottom of the pond (side slopes cannot be used in the calculation). A retention
pond that can cause injury to water rights or is in violation of state or federal law will not be accepted.
C. Erosion Protection Design Criteria. Erosion protection for storage facilities needs must to be designed to
prevent erosion and ensure that the sediment does not leave the site or impact downstream properties. It
may will be necessary to leave erosion control measures in place install straw bales, rip -rap, erosion control
logs, erosion control blankets, etc. on the storage facility side slopes to ensure that erosion does not occur
until one season of growth and the reseeded vegetation is establishedsite reaches final stabilization 70%
vegetative cover). The Control Measures/BMPs outlined in the UD€CDMHFD Manual (Volume 3) should be
used.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-110. Revegetation.
A. Weld County utilizes the information provided in the Revegetation Chapter of the UDFCDMHFD Manual
(Volume 2), and the Best Management Practices Chapter of the UDFCDMHFD Manual (Volume 3). Weld County
has highly recommended seed mixes that are applicable to specific areas of the County. These seed mixes can
be found in the Weed Management Section of under the Weld County Public Works Website, Weed
Management Section. If noxious weeds, as defi-ned by the State of Colorado, exist onsite, the appropriate steps
shall be taken before, during, and after work is completed to control their spread. Noxious weeds shall be
controlled on site, pursuant to Chapter 15, Articles I and II, of the Weld County Code.
B. Seeding and Planting. In addition to the site preparation guidelines outlined in the revegetation chapter of the
UDFCDMHFD Manual (Volume 2), if mulching with straw, the straw must be free of seeds and weeds.
(Weld County Code Ordinance 2019-12 )
Sec. 8-11-120. Stormwater quality.
A. A water quality feature is intended to improves the quality of stormwater runoff resulting water quality from
the impacts of site development. A water quality feature can be an existing low spot on the a property that
currently naturally collects water, or it can be an excavated area on a property that has been excavated to
capture stormwater runoff. The required water quality capture volume of a feature required is based upon on
the site's size and imperviousness. This depression is intended -to a4towA properly sized feature will capture
and hold stormwater runoff from the site to collect and for the period of time necessary for contaminants to
settle out any contaminants prior before stormwater runoff to flowingis allowed to exit the site. offsite to
tream waterways.
B An accepted methodology for a water quality feature design can be found in the UDFCDMHFD Manual, Volume
3, Best Management Practices.
C. For regulations pertaining to MS4 areas, refer to Chapter 8, Article IX of this code.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-130. Control measures.
Weld County uses the Control Measures/BMPs that are outlined in the UDFCDMHFD Manual (Volume 3) Best
Management Practices.
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 54 of 140
Sec. 8-11-140. Maintenance.
A. Culverts located outside 01 County -maintained road rights -of -way are not maintained by Weld County. The
owners of those culverts are responsible for their maintenance. Culverts that are part of a suodivision drainage
plan are maintained by the respective homeowner's association. Those culverts should be maintained and
cleaned out annually, per the drainage report maintenance plan, or on an as -needed basis to ensure proper
drainage of the subdivision.
B. To assist owners with maintenance, an operations and maintenance manual for stormwater facilities and
associated infrastructure shall be developed and included with the final drainage report. The operations
manuals will include instructions on safe and correct operations, repair and maintenance of all installed
equipment and facilities and recommended inspection schedules. The operations and maintenance manual
shall be distributed to any applicable homeowners' association or business park association (or equivalent).
C. The property owner/developer, not Weld County, is responsible for site maintenance and revegetation.
D. Access must be provided to the drainage facilities for long-term maintenance.
E. Areas designated for stormwater storage, retention, or detention are not to be used for storage of materials,
building, or parking, or modified without approval from the Department of Public WorksWeld County.
(Weld County Code Ordinance 2019-12)
Sec. 8-11-150. Enforcement.
The County, through its Department of Public Works or other departments so authorized, may enforce this
Article XI through methods described below or through other methods adopted by the Board of County
Commissioners.
If it appears to County staff that any property is being or is proposed to be excavated, graded, altered, or used
in violation of this Article XI, the County Attorney, in addition to the other remedies provided by law, ordinance or
resolution, may institute an injunction, mandamus, abatement or other appropriate action or proceeding to prevent,
enjoin, abate or remove such violation. In addition, the County may, without seeking relief from ary court, refuse to
issue any zoning, building, certificate of occupancy, or other County -issued permit until the property is brought into
compliance with the requirements of this Article XI. In any case in which the improvements required by this Article
XI are included in an Improvements Agreement between the property owner and the County, the County may access
and use collateral in accordance with the terms of that agreement for the purpose of ensuring compliance with this
Article XI.
Sec. 8-11-160. Stormwater drainage criteria variances.
The variance procedure is intended to address cases of hardship. Relief from the provisions of this article may
not be granted when the hardship is brought about solely through the actions of the appellant. No relief may be
granted when the result of granting the requested relief is detrimental to the public health, safety, and general
welfare or when the relief is contrary to the purpose and intent of this article. In granting any variance, the
Department of Public WorksWeld County may prescribe appropriate conditions and safeguards in conformity with
this article. Violation of such conditions and safeguards, when made a part of the terms under which the variance is
granted, shall be deemed a violation of this article.
The variance request shall be stamped and signed by a professional civil engineer licensed to practice in the
State of Colorado. Requests will be reviewed by the Public WorksPlanning Director or his/her designeeproper Weld
County designee. In order to be granted, the variance request must meet the criteria as specified in Chapter 12 of
the Weld County Engineering and Construction Criteria {Appendix 8-0 of the Weld County Code).:
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 55 of 140
Code.
A. Describe the design criteria of the Weld County Code of which L
C. Meet the design intent of the Weld County Code.
ID. Demonstrate that granting of t
welfare.
le variance wi
E. Demonstrate there are no adverse impacts,
site properties as a result of the project.
An applicant may appeal the denial of a variance to the Board of County Commissioners pursuant to the
provisions of Section 2-4-10 of this Code.
I still adequate
yp
rotect public health, safety, and genera -
Variance requests, if accepted, are not precedent setting and are based upon specific site constraints.
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 56 of 140
CHAPTER 8 - Public Works
ARTICLE XII Grading Permit Policy
ARTICLE XII Grading Permit Policy
Sec. 8-12-10. General.
The Grading Permit is a tool to ensure that the County has reviewed proposed grading plans and erosion and
sediment control practices for planned construction activities with the goal of avoiding potential damages and risks
to the public. A Grading Permit grants the Permit Holder permission to conduct construction activities within the
requirements of applicable state regulations and provides the County with sufficient oversight to minimize the
potential for offsite damages. In addition, construction activities in the County must be compliant with applicable
state regulations regarding releases of sediment and water from construction sites. This policy shall apply within all
unincorporated areas of the County as of the effective date of this Article.
Sec. 8-12-20. Purpose.
This Article recognizes the importance of protecting the health, safety and welfare of the public, safeguarding
County infrastructure, and the protection of water quality and private property rights. This Article describes the
minimum requirements for prevention of detrimental or negative impacts to County water quality and damages to
private property and County infrastructure by construction activities within the County. The goals are:
A. To prevent sediment releases, erosional damage or excessive water discharges from construction sites
onto adjoining private property.
B To prevent erosion, sediment and water discharge damage to County -maintained infrastructure, such as
roads and bridges, that results in costs to taxpayers.
C. To prevent the degradation of surface water quality and the ability of existing ditches, channels and
swales to drain due to sediment releases.
D To identify and eliminate any preventable damages to County infrastructure caused by construction
activities.
E. To ensure compliance with all Federal, State, and County laws and regulations pertaining to grading and
water quality
Sec. 8-12-30. Grading Permit.
A. Issuance of Grading Permit. A Grading Permit shall be issued only in compliance with the rules and regulations
set forth in this Article. In no event shall construction be allowed or permitted if it is detrimental to the public
health, welfare and safety or the grading and/or sediment and erosion control plans indicate that the
construction activities will be out of compliance with Federal or State laws and regulations.
B. Necessity for Grading Permit. Unless an exemption exists, a Grading Permit is required for construction
activities that disturb over one (1) acre of land.
No Work Without Permit. No person or entity may surface disturb, grade, construct or excavate over one (1)
acre of nonexempted ground without first having obtained a Grading Permit from the department of Public
WorksWeld County. In addition, no person or entity may grade, excavate, construct or leave disturbed and
unstabilized over one (1) acre of nonexempted ground beyond the date or dates specified in the Permit unless:
(1) the person or entity requests a written extension before the expiration of the initial Permit; and (2) a new
Permit or extension is granted. It is a violation of this article to perform this work without a permit.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 57 of 140
D Exemptions. The following land disturbance activities are permissible without obtaining a Grading Permit,
unless otherwise located within a designated Municipal Separate Storm Sewer Systems (MS4) area. The
Department shall determine if the exemption is in accordance with the County's MS4 permit. Other permits,
such as right-of-way, flood hazard or OWTS, may still be required.
1. Projects which involve less than a total of one (1) acre (43,560 square feet) of disturbed ground surface
or graded area, unless the Colorado Department of Public Health and Environment has required a Storm
Water Management Plan (SWMP) or Construction Storm Water Discharge Permit.
a. Individual lots in subdivision developments under the same ownership, involving less than one (1)
acre of disturbed area, shall not be considered separate projects if they are contiguous.
b. Any series of related projects or connected projects on one (1) site, which together exceed the
one -acre limitation, shall be considered a single project and shall be required to obtain a Grading
Permit. For example, several ten -thousand -square -foot segments that add up to over one (1) acre
total area that connect to form a road would be considered a single project and would require a
Grading Permit.
2. Tillage of agricultural land is exempt from Grading Permit requirements.
3. Trenching incidental to the construction, maintenance and installation of approved underground
pipelines, electrical or communication facilities. However, a Grading Permit may be required for over
one (1) acre of ground disturbed for construction of roads, driveways, buildings, parking areas, accesses,
drainage facilities, landscaping or other construction not directly in the pipeline trench.
4. Land disturbance or excavations in accordance with plans incorporated in a mining permit, reclamation
plan or sanitary landfill approved by the County. However, a Grading Permit may be required for over
one (1) acre of ground disturbed for construction of roads, driveways, buildings, parking areas, accesses,
drainage facilities, landscaping or other construction not directly in the mined area or landfill.
5 County capital improvement or County maintenance projects within a road right-of-way and temporary
construction easements (TCE
6 Maintenance and cleaning of existing ditches, lakes, ponds and water storage reservoirs.
7 Maintenance and resurfacing of existing streets/roads, parking/outdoor storage areas, runways, and
sidewalks/trail systems.
8 Performance of emergency work necessary to prevent or mitigate an immediate threat to life or property
when an urgent necessity arises. The person performing such emergency work shall promptly notify
Department of Public WocksWeld County of the problem and work required. Any person performing
such emergency work shall immediately notify the Public Works D-irectorWeld County of the situation
and the actions taken. The Weld County Public Works and/or Planning Services Director may, however,
require such person to obtain a Grading Permit to implement remedial measures to minimize erosion
resulting from the emergency.
9 Land disturbance incidental to the creation of irrigation water storage ponds. Stockpiles that create more
than an acre of disturbed area may require a Grading Permit.
10 Graves in cemeteries.
11 Land disturbance associated with the construction of natural surface trails may be exempted by the
Director of Public WorksWeld County except within designated MS4 areas, provided that the procedure
outlined in this Article is completed prior to commencement of any trail construction. If exempted, the
land disturbance associated with the construction of natural surface trails shall generally conform with
the performance standards of this Article.
(Weld County Code Ordinance 2011-10 ; Weld County Code Ordinance 2019-09 )
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 58 of 140
Sec. 8-12-40. Definitions.
For the purpose of this Article, the following terms, phrases, words and their derivations shall have the
meanings given herein:
Acre: means a total area of forty-three thousand five hundred sixty (43,560) square feet.
Contractor: means any party performing the installation and construction for a permit holder who obtains a
permit pursuant to this Article. A contractor may be a permit holder under this definition.
Control Measures (formerly Best Management Practices/BMPs): means temporary or permanent erosion and
sediment control methods that have been determined (according to EPA guidance) to be the most effective, practical
means of preventing or reducing pollution from nonpoint sources. Control Measures address prevention of water
pollution and control of dust from construction sites.
Construction dewaterinq permit means the Colorado Discharge Permitting System "CDPS) General Permit
COG080000, Construction Dewatering Discharges, which is regulated by the Colorado Department of Public Health
and Environment, Water Quality Control Division.
Construction stormwater permit means the Colorado Discharge Permitting System (CDPS) General Permit
COR400000, Stormwater Discharges Associated with Construction Activity, which is regulated by the Colorado
Department of Public Health and Environment, Water Quality Control Division.
Disturbed area: means that area of the land's surface disturbed by any work activity upon the property by
means including, but not limited to: grading; excavating; stockpiling soil, fill or other materials; clearing; vegetation
removal; removal or deposit of any rock, soil or other materials; or other activities which expose soil. Disturbed area
does not include the tillage of land that is zoned agricultural or the tillage of a parcel zoned PUD (planned unit
development) within the area identified for agricultural uses.
Grading: means excavation, cutting, filling, clearing and grubbing, stockpiling and recontouring the land
surface, or any combination of these.
Grading plan: means the construction drawing or other depiction showing the existing and the proposed
elevation contours of the area to be disturbed by construction.
Land disturbance activity: means any activity which changes the volume or peak flow discharge rate of
precipitation runoff from the land surface, including, but not limited to, grading, digging, cutting, scraping or
excavating of soil, placement of fill materials, paving, construction, substantial removal of vegetation or any activity
which bares soil or rock or involves the diversion or piping of any natural or man-made watercourse.
Lines: means all underground and overhead cable, telephone, electric power, wire, gas and irrigation lines,
appurtenances, structures or pipelines.
Municipal Separate Storm Sewer System (MS4): means an area defined by the Federal Environmental
Protection Agency (EPA) in 40 CFR 122 as defined in Chapter 8, Article IX of this code.
Permit holder: means the owner, operator, person and/or entity constructing, excavating or occupying the
construction site who has obtained a Grading Permit pursuant to this Article.
Right-of-way (ROW): means a strip of land that is dedicated or granted to and accepted by Weld County
through an easement, plat or other legal mechanism for transportation purposes, such as a roadway or highway.
whether maintained or non -maintained by Weld County. The term is used as both singular and plural.
Sediment and erosion control plan: means a document showing the proposed finished contours and depicting
the location of all erosion and sediment control measures (control measures).
Stabilization: means a state when all ground surface disturbing activities at the site have been completed and
uniform vegetative cover has been established with an individual plant density of at least seventy (70) percent of
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 59 of 140
pre -disturbance levels, erosion control blankets are in place or equivalent permanent physical erosion reduction
methods have been employed. Stabilization includes the removal of non -permanent control measures.
Storm water construction permit: is the state -issued permit for construction activity disturbing one acre or
more, including disturbance less than one acre but is part of a larger common plan of development or sale.
Sec. 8-12-50. Grading Permit application.
A. Complete Application Required. Applicants shall file a complete application for a Grading Permit. Based upon
the information provided in the application, additional submittals may be required by the Department of Public
WorksWeld Count if sufficient information was not provided for review of the application. An application shall
be considered complete if it is submitted in the required form, includes all mandatory information, including
all supporting materials specified by application, and is accompanied by the applicable fee. If an application is
determined to be incomplete, the Department of Public WorksWeld County shall provide notice to the
applicant, along with an explanation of the application's deficiencies. No further processing of the application
shall occur until the deficiencies are corrected in a future resubmittal. An application which is determined to
be incomplete may, or may not, retain its same processing cycle.
B A complete application will typically include civil engineering drawings signed and sealed by a registered Civil
Engineer in the State. The drawings shall include a grading plan showing -(with existing and proposed contours,
an -el -spot elevations, and earth balance when requested), and a drainage plan. In addition, a Sediment and
Erosion Control Plan that shows the location and types of control measures to be utilized at the site shall be
provided. Typical control measure installation details and maintenance notes should also be on the drawings.
C. A complete application shall include a utility map in accordance with Subsurface Utility Engineering (SUE)/811
Law Level B, SB18-167, if the construction meets the application conditions.
(Weld County Code Ordinance 2011-10 ; Weld County Code Ordinance 2019-09 )
Sec. 8-12-60. Application review, Grading Permit issuance, permit expiration and permit
extension.
A Review Process. The application and other data filed by an applicant for a Grading Permit shall be reviewed by
the Department of Public WorksWeld County. The application may also be reviewed by other departments or
agencies to verify compliance with any applicable laws. If the Department of Public WorksWeld County finds
that the work described in an application for a Grading Permit conforms to the requirements and regulations
set forth in this Article and meets the requirements defined in the Weld County Engineering and Construction
Criteria Manual (Appendix 8-O) or other pertinent laws regulations or ordinances, and that all required fees
have been paid, a Grading Permit shall be issued to the applicant. Criteria upon which the Grading Permit shall
be considered include, but are not limited to, the following:
1. Water quality protection: The proposed construction must include proposed installation and provision
for maintenance of adequate sediment and erosion control measures that, to the extent possible,
prevent erosion and/or release of sediment, excessive stormwater and/or pumped water discharges to
surface waters from the construction area.
2 Adjacent property protection: The proposed construction must include sediment and erosion control
measures that, to the extent possible, prevent damage, erosion and/or release of any sediment,
excessive stormwater and/or pumped water discharges from the construction area to adjacent
properties and roadways.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 60 of 140
3. Constructability: Installation of control measures, trenches, excavations and other construction practices
must be able to be performed according to general construction and safety practices. The proposed
construction work must not create a public safety hazard.
B. Changes in Approved a Weld County Grading Permit. An approvedWeld County Grading Permit shall not be
changed, modified or altered without written authorization from the Department of Public Work5County. All
work shall be done in conformance with the approved -Permit issued.
C Permit Limitations. An approved Weld County Grading Permit requires the Permit Holder to meet certain
permit specifications and general engineering standards. The Department of -Public WorksWeld County shall
be responsible for ensuring compliance with such specifications and standards. The issuing and granting of the
Grading Permit shall not be construed to be a permit for, or an approval of, any violation of any of the
provisions of this Article or of any Federal, State or County regulations of the State or County. Additionally, the
issuance of the Grading Permit shall not be construed as the approval or issuance of any necessary permits
referred to in this Code.
D Indemnification. Every approved Weld County Grading Permit issued shall include the following language:
"Permit Holder, its agents, employees, subcontractors, contractors and assigns hereby agree to hold Weld
County, Colorado, the agencies thereof and their officers and employees harmless from any and all loss and
damage or any claims which may arise out of, or be connected with, the construction withir the area covered
by this permit; excluding any such loss and damage or any claims (including consequential damages) which
may be caused solely by the negligence of Weld County, the agencies thereof or its officers and employees."
E Early Release of Grading Permit. An applicant may apply for early release of a Grading Permit for a project
requiring the issuance of a land use permit for the time period after approval by the Board of County
Commissioners or Planning Director and prior to recording the required plat or map.
F Permit Expiration. Every Tpproved Weld County Grading Permit shall expire one (1) year from the issuance of
the permit. If the permit has expired, the Grading Permit must be reissued by the Department of Public
WorksCounty before work can begin or be resumed. Prior to the expiration or closure of the Grading Permit,
the disturbance shall be stabilized, and non -permanent control measures shall be removed.
G. Permit Extension. Any Permit Holder with an unexpired Grading Permit may apply, in writing, for an extension
of the time within which work may begin under that Grading Permit if the Permit Holder is unable to begin or
complete work within the time required for good cause, and that the cause is acceptable to the Department
of Public WorksWeld County. There shall may be an extension fee assessed to cover administrative costs.
(Weld County Code Ordinance 2011-10 ; Weld County Code Ordinance 2019-09 )
Sec. 8-12-70. Reserved.
Editor's note(s)—Weld County Code Ordinance 2019-09 , adopted July 22, 2019, repealed § 8-12-70, which pertained
to county authority and derived from Weld County Code Ordinance 2011-10 .
Sec. 8-12-80. Permit Holder's general responsibilities.
A Permit Holder is responsible for the following items. Additional requirements and more detailed information
are shown in the Special Provisions of the Grading Permit.
A. Control Measures. The Permit Holder shall ensure that all erosion and sediment control measures shown
on the approved accepted plans are correctly installed and maintained.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 61 of 140
B. Other Permits. The Permit Holder shall secure all permits required by federal, state and local agencies.
Written documentation from an outside agency stating that the grading activities do not require an
agency permit shall be provided to the County when requested.
C. Insurance. The Permit Holder shall secure and maintain insurance policies that will protect them, their
subcontractors and the County from claims for bodily injury, death or property damage, which may arise
from the excavation, installation and/or construction contemplated or caused by the construction as
permitted herein.
D. Surety. If deemed necessary by the Department of Public Works or the Planning DepartmentWeld
County, the Permit Holder shall provide a surety bond and/or other security for the total amount
required to stabilize, restore or reclaim the disturbed ground to prevent erosion and/or release of
sediment, excessive storm water and/or pumped water discharges to surface waters from the
construction area. Said security shall remain in effect for a period of twenty-four (24) months after all
completion of construction and establishment of erosional stability. The amount of the security shall be
sufficient to stabilize a disturbed site to prevent releases of sediment and water from construction sites
and protect the health, safety and welfare of the public. The amount shall be based on cost estimates of
site restoration provided by the applicant and approved accepted by the County Engineer. Whether or
n ot covered by surety, the Permit Holder shall reimburse the County for any and all expenses incurred
by the County within twenty-four (24) months after completion of any work as a result of, or related to,
failure by the Permit Holder to perform all installation, construction, maintenance or other work
pursuant to the Grading Permit, in a workmanlike manner.
E. Utility Locates. The Permit Holder shall be responsible for utility locates in advance of the construction
o r excavation, in accordance with state law. The Permit Holder is responsible for any damages to existing
u tilities or structures.
F Traffic Control. Construction activities impacting the County rights -of -way shall not interfere with
movement of traffic or compromise public safety. A County Right -of -Way Use Permit may be required in
addition to a Grading Permit.
G. Emergency Conditions. When a condition arises where emergency work must be performed, the
applicant shall immediately notify the Department of Public WorksCounty of the emergency event, type
and extent of work. Within two (2) business days after the occurrence of the emergency, the applicant
shall apply for the necessary permits, pay the associated fees and fulfill the rest of the requirements
necessary to comply with the Grading Permit for the actions the applicant took in response to the
e mergency.
H Drainage Interference. A Permit Holder shall not obstruct the natural free and clear passage of water
along the roadside ditch flow lines or other waterways. If surface drainage is to be affected, the Permit
Holder is responsible for the proper runoff management to prevent erosion and/or release of sediment,
excessive storm water and/or pumped water discharges to adjacent properties and surface waters from
the construction area.
Site Stabilization, Restoration and Cleanup. The Permit Holder shall assume all responsibility for
stabilizing the permitted site to prevent erosion and discharges of sediment. The Permit Holder shall also
assume all responsibility for removing all debris associated with the construction activities in the County
rights -of -way and all non -permanent control measures. If, upon inspection, the Department of Public
WorksCounty determines that there is risk of erosional damage, or sediment discharges or debris has
not been removed from the County rights -of -way, the Department of Public WorksCounty shall notify
the Permit Holder of the violation of the Grading Permit conditions. The Permit Holder, upon notification
from the Department of Public WorksCounty, shall correct all work to the extent necessary. The work
shall be completed within the time period specified in the notice from the Department of Public
WorksCounty. If the Permit Holder fails to establish site stability or restore the rights -of -way in the
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 62 of 140
manner and to the condition required, is Works m -ay hay? the County may
perform the restorations. In that event, the Permit Holder shall pay to the County, within thirty (30) days
of billing, the cost of restoring the County rights -of -way.
Ownership and Maintenance. The Permit Holder shall own, maintain, operate and repair all work on
private property in accordance with the regulations, conditions and terms of the Grading Permit.
K Warranty of Right -of -Way. The County does not warrant its ownership of rights -of -way which may be
the subject of any issued Grading Permit. The Permit Holder is responsible for determining the ownership
of properties subject to its construction.
Sec. 8-12-90. Inspections.
A. Inspections during the construction period may be made by the Department of Public WorksCounty to ensure
that work is progressing in compliance with the Grading Permit. It shall be the responsibility of the Permit
Holder to provide safe access to the work site for the De artmnent of Public WorksCounty and to all others, as
authorized by law, for inspection at all reasonable times during the execution and upon :ompletion of the
work. At the time of inspection, the Department of Public WorksCounty may order the immediate termination
of any work which involves the unauthorized exportation of material, or which poses, or is causing, a serious
threat to the life, health, safety or well-being of the public.
B. It shall be the responsibility of the Permit Holder to notify the Department of Public WorksCounty when work
is ready for inspection. The Department of Public WorksWeld County requires that every request for inspection
be received at least forty-eight (48) hours before such inspection. Such requests may be made by telephoning,
or emailing o -r faxing the Department of Public Woikslanning Services. The presence of
WorksCounty employees on -site shall not guarantee or qualify the Permit Holder's performance. The approved
Weld County Grading Permit must be available on -site for review by Department of Public WorksCounty staff.
Failure to comply may result in suspension of the Grading Permit.
C. To ensure compliance with this Article, The -the Department of Public WorksCounty may make, or require,
other inspections and/or testing of any work as deemed necessary e provisions
of this Article. Any wWork performed without th-e- required inspections shall be subject to removal and
replacement at the Permit Holder's expense, regardless of the quality of the work. Any inspection hours
required outside of the normal working hours will be paid for by the Permit Holder. Certain types of work may
have require continuous inspection_ and, wWhen large scalesuch projects exceed the ability of the Department
of Public WorksCounty's ability to provide ample inspection, the Permit Holder will incur the cost of for
providing a private inspection firm to conduct inspections as needed. This third -party inspector will be
appointed by the Department of Public WorksCounty prior to issuance of the Grading Permit.
(Weld County Code Ordinance 2011-10 ; Weld County Code Ordinance 2019-09 )
Sec. 8-12-100. Administrative fee.
All required fees shall be paid, in full, at the time of the Grading Permit application. The fee schedule for
Grading Permits shall be as determined by resolution of the Board of County Commissioners and shall be shown on
the Grading Permit.
Sec. 8-12-110. Appeal of denial of Grading Permit.
If an application for a Grading Permit is denied by the Department of Public WorksCounty, or if the applicant
objects to any of the terms or conditions of a permit thereby placed by the Department of Public WorksCounty, the
(Supp. No. 76)
Created: 2022-02-24 12:36:44 [EST]
Page 63 of 140
applicant has the right to appeal the decision to the Board of County Commissioners, in writing, utilizing the appeal
procedures set forth in Section 2-4-10 of this Code.
Sec. 8-12-120. Failure to comply with terms of grading permit.
A. The issuance of the Grading Permit based on plans, specifications or other data shall not prevent the
Department of Public WorksCounty from requiring the correction of errors in the plans, specifications and
other data, or from stopping excavation or construction operations being conducted in violation of this Article
or any other state or County regulations. Failure of the applicant to comply with any of the terms and
conditions of the Grading Permit shall be sufficient cause for cancellation of the Grading Permit.
B The Permit Holder shall prevent releases of sediment and water from construction sites that have the potential
to cause damage to private property or County -maintained infrastructure. In the event that construction
activities result in erosion or sediment and water discharges causing damage, the Permit Holder shall
immediately attempt to prevent further harm, install or replace by installing or replacing appropriate control
measures and by correcting any unsatisfactory work.
C. Right -of -Way Damage. The Permit Holder shall correct any unsatisfactory work: . Actions to remedy
unsatisfactory work may include the patching and/or the removal and replacement of defective
pavement.inc uoing but not imitec to defects in remova , replacement or pavement patching. Other actions
may be required. If the Permit Holder fails to restore the County rights -of -way in the manner and to the
condition required by the Department of Public Works or fails to satisfactorily and timely complete all
restorations required by the Department of Public Works to a same or better condition, or in a timely manner,
the County shall have the right to perform the restorations at the expense of the Permit Holder.
(Weld County Code Ordinance 2011-10; Weld County Code Ordinance 2019-09)
Sec. 8-12-130. Permit suspension or revocation.
A. The County may deny, revoke or suspend any Grading Permit in order to protect
the public health, safety and welfare. Permit Holders hold Grading Permits as a privilege. The County reserves
its -the right to revoke any Grading Permit without a fee refund whenever the Permit is issued in error, or on
the basis of based on incorrect information supplied provide° by the applicant, or whenever the Permit may
have beenis issued in violation of any provisions of this Article.
B. The grading permit will be suspended should 44 the Department of Public WorksCounty determine that the
Permit Holder has committed a substantial breach of a -the terms or conditions of any statute, ordinance, rule,
or regulation, or any condition of the Grading Permit itself, . the Department of Public Works shallWeld County
will notify the Permit Holder of its the Grading Permit suspension by either a phone, call or in writing, and
mandate thatan4 the Permit Holder must then remedy the violation. The demand shall state that continued
violations may be cause for revocation of the Grading Permit. Further, a substantial breach shall allow the
Department of Public WorksCounty to place additional or revised conditions on the Grading Permit.
C Within twenty-four (24) hours of receiving notification of the suspension, the Permit Holder shall contact the
Department of Public WorksCounty with a plan of correction which must be accepted by the Department. The
Permit Holder's failure to contact the Department of Public WorksCounty, failure to submit an acceptable plan;
or failure to reasonably implement the approved accepted plan shall be cause for immediate revocation of the
Grading Permit and termination of work. Upon revocation of the Grading Permit, the Permit Holder will be
required to re -apply for a new permit and will be charged for any additional fees that may be applicable.
(Weld County Code Ordinance 2011-10)
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 64 of 140
Sec. 8-12-140. Penalties.
A. Violations and Penalties. The County, through the Department-_, of Planning Services and Pub is Works or other
County departments so authorized, may enforce this Article through methods included in this Article or
through other methods adopted by the Board of County Commissioners.
B. Equitable Relief in Civil Action. In the case of any violation of this Article, the County Attorrey, in addition to
the other remedies provided by law, ordinance or resolution, may institute an injunction, mandamus,
abatement or other appropriate action or proceeding to prevent, enjoin, abate or remove such violation.
C. Civil Penalties. Any person, firm or corporation violating any provision of this Article may be subject to the
imposition, by order of the County Court, of a civil penalty. It is within the discretion of the County Attorney
to determine whether to pursue the civil penalties set forth in this Article, the remedies set forth above or
both.
(Weld County Code Ordinance 2011-10)
ARTICLE XIII Right -of -Way Use Permit Policy
Sec. 8-13-10. General.
The County strives to keep its road right-of-way in a state of good repair and free from unnecessary
encumbrances. The Right -of -Way Use Permit is a tool to regulate and permit the use of Weld County's public road
right-of-way by private companies, municipalities and/or special district constructing and burying lines either
crossing or running parallel within Weld County road right-of-way. Crossings are allowed for all lines. Parallel
installations are allowed for lines of "public utilities" that are defined in C.R.S. § 40-1-103 and are "domestic or
foreign electric light power, gas, or pipeline companies" holding current Certificates of Public Convenience and
Necessity issued by the Colorado Public Utilities Commission; for water lines of municipalities, water districts, and
water and sewer districts; for transmission lines or pipelines used solely for agricultural purposes; for fresh water
above -ground transfer pipelines; and for lines in non -maintained road right-of-way if approved by Weld County
based upon locational factors, such as, surrounding population density, topography, or if the road right-of-way
provides access to a recorded exemption lot, and with Permittee's agreement to move the line at its sole expense if
Weld County or an annexing municipality intends to improve the road right-of-way; or if authorizes by the Board of
County Commissioners in an appeal of the denial of a Right -of -Way Use Permit application, pursuant to Section 8-
13-110, below. Public road right-of-way subject to regulation by the Right -of -Way Use Permit includes Weld County's
maintained and non -maintained road right-of-way, and all public drainage easements. A Right -of -Way Use Permit
grants the Permittee and its Contractors permission to occupy designated County road right-of-way. The Permit
authorizes excavation, surveying, and/or construction of facilities within the County road right-of-way and provides
for their subsequent restoration upon completion of the Project. This Policy shall apply within all unincorporated
areas of the County.
Sec. 8-13-20. Purpose.
This Article recognizes the importance of protecting the health, safety and welfare of the traveling public,
maintaining efficient traffic flow and preserving the integrity of Weld County's road right-of-way.
Created: 2022-02-24 12:36:44 [EST]
(Supp. No. 76)
Page 65 of 140
Sec. 8-13-30. Regulation of work in county road right-of-way.
A. Issuance of Right -of -Way Use Permit. A Right -of -Way Use Permit shall be issued only in compliance with the
rules and regulations set forth in this Article. In no event shall construction within the County road right-of-
way be allowed or permitted if it is detrimental to the public health, welfare and safety.
B. Right -of -Way Use Permit Necessary. A Right -of -Way Use Permit is required for occupying, constructing,
maintaining or excavating facilities within, and for encroaching upon, any County road right-of-way.
C No Work Without Right -of -Way Use Permit. No person or entity may occupy, construct, perform maintenance
or excavate within any County road right-of-way or easement, or encroach upon any County rights -of -way or
easement, without first having obtained a Right -of -Way Use Permit from the Department of Public Works. In
addition, no person or entity may excavate, construct, perform maintenance or occupy the County road right-
of-way beyond the date or dates specified in the permit unless: (1) the person or entity requests a written
extension before the expiration of the initial permit, and (2) a new permit or extension is granted.
(Weld County Code Ordinance 2018-10)
Sec. 8-13-40. Definitions.
For the purpose of this Article, the following terms, phrases, words and their derivations shall have the
meanings given herein:
Contractor means any party performing the installation and construction for a Permittee who obtains a permit
pursuant to this Article. A Contractor may be a Permittee under this definition.
Lines means all underground and overhead cable, telephone, electric power, wire, gas and irrigation lines,
appurtenances, structures or pipelines.
Permittee means the owner, operator, person and/or entity constructing, excavating or occupying the County
road right-of-way who has obtained a permit pursuant to this Article.
Right -of -Way (ROW) means a portion of land that is dedicated or granted to and accepted by Weld County for
transportation purposes, such as a roadway or highway whether maintained or notnon-maintained by Weld County.
The term is used as both singular and plural.
Sec. 8-13-50. Right-of-Wway these Ppermit application.
Complete Application Required. Applicants shall file a complete application for a Right -of -Way Use Permit.
Based upon the information provided in the application, additional submittals may be required by the Department
of Public Works if sufficient information was not provided for review of the application. An application shall be
considered complete if it is submitted in the acceptedrequfted form, includes all mandatory information, including
all supporting materials specified by application, and i`s accompanied by the appl-icable fee. If an application is
determined to be incomplete, the Department of Public Works shall provide notice to the applicant, along with an
explanation of the application's deficiencies. No further processing of the application shall occur until the
deficiencies are corrected in a future resubmittal. An application which is determined to be incomplete may or may
not retain its same processing cycle. The Right -of -Way Use Permit and Application ace is found in Appendix 8-P, the
terms and conditions of which are incorporated into this Article.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 66 of 140
Sec. 8-13-60. Application review, Rcight-of-wWay Uuse Ppermit issuance, permit expiration
and permit extension.
A Review Process. The application and other data filed by an applicant for a Right -of -Way Use Permit shall be
reviewed by the Department of Public Works. The application may also be reviewed by other departments or
agencies to verify compliance with any applicable laws. If the Department of Public Works finds that the work
described in an application for a Right -of -Way Use Permit conforms to the requirements and regulations set
forth in this Article, meets the requirements defined in the Weld County Engineering and Construction Criteria
Manual (Appendix 8-Q). Department of Public Works Design Standards and Criteria or other pertinent laws
regulations or ordinances, and that all required fees have been paid, a Right -of -Way Use Permit shall be issued
to the applicant. Criteria upon which the Right -of -Way Use Permit shall be considered include, but are not
limited to, the following:
1. Safety: Occupation, construction, maintenance or excavating within the County road right-of-way must
not create a safety hazard to the travelling public.
2 Constructability: All construction, maintenance or excavation within the County road right-of-way must
be able to be performed according to general construction practices.
B. Changes in Approved Permit. An approved Right -of -Way Use Permit shall not be changed, modified or altered
without written authorization from the Department of Public Works. All work shall be dore in conformance
with the approved Permit.
C Permit Limitations. An approved Right -of -Way Use Permit requires the Permittee to meet certain permit
specifications and general engineering standards when working within the Weld County road right-of-way. The
Department of Public Works shall be responsible for ensuring compliance with such specifications and
standards. Reasonable care should be used to avoid damaging the existing roadway and/or County road right-
of-way. The issuing and granting of the Right -of -Way Use Permit shall not be construed to be a permit for, or
an approval of, any violation of any of the provisions of this Article or of any regulations of the County.
D. Indemnification. The Permittee, its agents, employees, subcontractors, Contractors and assigns, hereby agrees
to hold Weld County, Colorado, the agencies thereof and their officers and employees harmless from any and
all loss and damage or any claims which may arise out of, or be connected with, the construction, installation,
maintenance, alteration, removal or presence of the lines installed and/or constructed herein referred to or
any work or facility connected therewith, within the area covered by this permit; excluding any such loss and
damage or any claims (including consequential damages) which may be caused solely by the negligence of the
County, the agencies thereof or its officers and employees. The Permittee fully understands that all line
installation, construction, maintenance and relocation will be performed at no expense whatsoever to the
County.
E Permit Expiration. Every approved issued Right -of -Way Use Permit shall expire if the work authorized by the
permit_is has not substantially begun within three (3) months from the date of the permit issuance or if the
construction of work authorized by the permit is suspended or abandoned for a period of one (1) year at any
time after the work has begun. Before work can begin or be resumed, the- a new permit must be applied for
and reissued by the Weld County Department of Public Works.
F Permit Extension. Any Permittee with an unexpired Right -of -Way Use Permit may apply, in writing, for an
extension of the time within which work may begin or be completed under that permit if the Permittee is
unable to begin and complete work within the time required for good cause, and that the cause is acceptable
to the Weld County Department of Public Works. If Permittee does not apply prior to the Permit expiring, the
Permittee shall reapply for a new Permit. Projects in progress under and expired Permit shall suspend work
until a new permit is issued. There shall be an extension fee assessed to cover administrative costs.
(Weld County Code Ordinance 2018-10)
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 67 of 140
Sec. 8-13-70. County authority.
A Right -of -Way Use Permit is considered to be a license for use of the County road right-of-way. The
Department of Public Works shall have the authority to suspend work, wholly or in part, because of the failure of
the Permittee to properly execute the work in accordance with this Article. Weld County, notwithstanding the
issuance of any permit or construction in Weld County road right-of-way, reserves the right to make any changes,
additions, repairs or required relocation of any facilities within the dedicated road right-of-way at any time including,
but not limited to, in connection with the relocation, reconstruction, widening and maintaining roads or road right-
of-way, without compensating the owner.
Sec. 8-13-80. Permittee's general responsibilities.
The Permittee is responsible to comply with all of the terms and conditions set forth in this Article and the
Right -of -Way Use Permit found in Appendix 8-P.
Sec. 8-13-90. Inspections.
A. Inspection of work performed within Weld County road right-of-way, pursuant to an approved Right -of -Way
Use Permit, is required. Inspections during the construction period will be made by the Weld County
Department of Public Works to ensure that work is progressing in compliance with the Permit. If at any time
during an inspection it is determined work is out of compliance with the Permit or there is a safety concern, a
stop work order shall be enforced until compliance has been returned. It shall be the responsibility of the
Permittee to provide safe access to the work site for the Department and to all others, as authorized by law,
for inspection at all reasonable times during the execution and upon completion of the work. At the time of
inspection, the Department may order the immediate termination of any work which poses a serious threat
to the life, health, safety or well-being of the public.
B. It shall be the responsibility of the Permittee to notify the Department of Public Works when work is ready for
inspection. The Department requires that every request for inspection be received at least forty-eight (48)
hours before such inspection. Such requests may be made by telephoning, :_; emailing or faxing the
Department. The presence of Department employees on -site shall not guarantee or qualify the Permittee's
performance. The approved permit must be available on -site for review by Department staff. Failure to comply
will result in suspension of the Permit.
C. The Department of Public Works may make or require other inspections or testing of any work as deemed
necessary to ascertain compliance with the provisions of this Article. Any work performed without the required
inspections shall be subject to removal and replacement at the Permittee's expense, regardless of the quality
of the work. Any inspection hours required outside of the normal working hours will be paid by the Permittee.
Certain types of work may have continuous inspection and when large-scale projects exceed the ability of the
Department to provide inspection, the Permittee will incur the cost of a private inspection firm. This third -
party inspector will be appointed by the Department prior to issuance of the Permit.
(Weld County Code Ordinance 2018-10)
Sec. 8-13-100. Administrative fee.
All required fees shall be paid in full at the time of the permit application prior to Permit issuance. The fee
schedule for Right -of -Way Use Permits shall be as determined by resolution of the Board of County Commissioners
and shall be shown on the permit. If the applicant objects to the denial of a permit application by the Weld County
Department of Public Works, or objects to any of the terms or conditions of a permit thereby placed by the
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 68 of 140
Department, the applicant has the right to appeal the decision to the Board of County Commissioners, in accordance
with the procedures detailed in Section 12-4-110, below.
Sec. 8-13-110. Appeal of denial of Rcight-of-Wway Uiise Permit.
If an application for a Right -of -Way Use Permit is denied by the Weld County Department of Public Works, or
if the applicant objects to any of the terms or conditions of a permit thereby placed by the Department, the applicant
has the right to appeal the decision to the Board of County Commissioners, in writing, utilizing the appeal procedures
set forth in Section 2-4-10 of this Code.
Sec. 8-13-120. Failure to comply.
A. The issuance of the Right -of -Way Use Permit based on plans, specifications or other data shall not prevent the
Weld County Department of Public Works from requiring the correction of errors in the plans, specifications
and other data or from stopping excavation or construction operations being conducted in violation of this
Article or any other regulations of the County. Failure of the applicant to comply with any of the terms and
conditions of the Permit shall be sufficient cause for cancellation of the permit.
B. The Permittee shall correct any unsatisfactory work including, but not limited to, defects in removal,
replacement or patching. If the Permittee fails to restore the Weld County road right-of-way in the manner
and to the condition required by the Weld County Department of Public Works or fails to satisfactorily and
timely complete all restorations required by the Department, the County shall have the right to perform the
restorations at the expense of the Permittee.
C. Weld County reserves the right to require relocation of any facilities within the dedicated road right-of-way at
any time without compensating the owner. If the Contractor or Permittee does not perform the required
relocation within four (4) months of notification from the Weld County Department of Public Works, no new
permits will be issued from the Department of Public Works for the contractor until the relocation has been
accomplished.
(Weld County Code Ordinance 2018-10)
Sec. 8-13-130. Permit suspension or revocation.
A. The Weld County Department of Public Works may deny, revoke or suspend any Right -of -Way Use Permit to
protect the public health, safety, welfare and safe function of Weld County roads. The grant of the Right -of -
Way Use Permit to the Permittee is a privilege, not a right. The County reserves its right to revoke any Right -
of -Way Use Permit without a fee refund whenever the Permit is issued in error or on the basis of incorrect
information supplied by the Permittee, or whenever the Permit may have been issued in violation of any
provisions of this Article.
B. If the Weld County Department of Public Works determines that the Permittee has committed a substantial
breach of a term or condition of any statute, ordinance, rule, regulation or any term or condit on of the Permit,
the Department shall notify the Permittee of its suspension by either a phone call or a written demand, and
the Permittee must then remedy the violation. The demand shall state that continued violations may be cause
for revocation of the permit. Further, a substantial breach shall allow the Department to place additional or
revised conditions on the Permit.
C. Within twenty-four (24) hours of receiving notification of the suspension, the Permittee shall contact the Weld
County Department of Public Works with a plan of correction which must be accepted by the Department. The
Permittee's failure to contact the Department, failure to submit an acceptable plan or failure to reasonably
implement the approved plan, shall be cause for immediate revocation of the permit and termination of work.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 69 of 140
Upon revocation of the permit the Permittee will be required to re -apply for a new permit and will be charged
for any additional fees that may be applicable.
(Weld County Code Ordinance 2018-10)
Sec. 8-13-140. Enforcement.
A. Violations and Penalties. Weld County, through the Weld County Department of Public Works or other
departments so authorized, may enforce this Article through methods included in this Article or through other
methods adopted by the Board of County Commissioners.
B Criminal Penalties.
1. It is unlawful to occupy, construct or excavate within any Weld County road right-of-way or encroach
upon any County road right-of-way, unless a Right -of -Way Use Permit is first issued. Any person, firm or
corporation violating any provision of this Article is guilty of a Class 2 petty offense, which, upon
conviction thereof, shall be punishable by a fine of three hundred dollars ($300.00) or by imprisonment
in the County jail for not more than ten (10) days, or by both such fine and imprisonment, for each
separate violation. Each day during which such violation continues shall be deemed a separate offense.
2. Whenever the Weld County Department of Public Works, through one (1) of its employees, has personal
knowledge of any violation of this Article, it shall give written notice to the violator to correct such
violation within seven (7) days after the date of such notice. Should the violator fail to correct the
violation within such seven-day period, the department may request that the Sheriff's Office issue a
summons and complaint to the violator, stating the nature of the violation with sufficient particularity
to give notice of said charge to the violator. The summons and complaint shall require that the violator
appear in court at a definite time and place stated therein to answer and defend the charge. One (1)
copy of said summons and complaint shall be served upon the violator by the Sheriff's Office in the
manner provided by law for the service of a criminal summons. One (1) copy each shall be retained by
the Sheriff's Office and the Department, and one (1) copy shall be transmitted to the Clerk of the Court.
The County may remove any obstruction or work not conforming to this Article during the pendency of
the enforcement action.
3 It is the responsibility of the County Attorney to enforce the provisions of this Section. In the event the
Board of County Commissioners deems it appropriate, the Board of County Commissioners may appoint
the District Attorney to perform such enforcement duties in lieu of the County Attorney.
4. Any arresting law enforcement officer shall follow the penalty assessment procedure provided in Section
16-2-201, C.R.S., for any violation of this Article.
C. Equitable Relief in Civil Action. In the case of any violation of this Article, the County Attorney, in addition to
the other remedies provided by law, ordinance or resolution, may institute an injunction, mandamus,
abatement or other appropriate action or proceeding to prevent, enjoin, abate or remove such violation.
D. Civil Penalties. In addition to any of the penalties set forth above, any person, firm or corporation violating any
such regulation, provision or amendment thereof or any provision of this Article, may be subject to the
imposition, by order of the County Court, of a civil penalty in an amount of not less than two hundred fifty
dollars ($250.00), nor more than five hundred dollars ($500.00). It is within the discretion of the County
Attorney to determine whether to pursue the civil penalties set forth in this Article, the remedies set forth
above, or both. Each day after the issuance of the order of the County Court during which such unlawful activity
continues shall be deemed a separate violation and shall, in accordance with the subsequent provisions of this
Section, be the subject of a continuing penalty in an amount not to exceed fifty dollars ($50.00) for each such
day. In no event shall civil penalties, imposed pursuant to this Subsection, constitute a lien against real
property.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 70 of 140
(Weld County Code Ordinance 2018-10)
ARTICLE XIV Road Access Policy
Sec. 8-14-10. Intent of road access policy.
This Article XIV is established for the safe and efficient movement of traffic while allowing reasonable and safe
access to properties. It is necessary to protect the public health, safety and welfare to maintain ccnventional traffic
flow along with unobstructed roadside drainage and to protect the functional integrity (safety, mobility, & and
capacity) of County roadways. Access management is an important tool in transportation planning, which identifies
the safety, spacing and location of driveways, median openings, and the interconnectivity of road classifications to
maintain the access and mobility function of collector and arterials roads. This Article XIV shall apply to all accesses
utilizing County rights -of -way within the unincorporated area of Weld County.
Sec. 8-14-20. Purpose and intent.
The purpose of access management is to manage the safety of existing and proposed accesses adjacent to land
uses on County roads to ensure that safety, capacity, and function are preserved and a reduction in conflict points
occurs. This Article XIV describes the minimum requirements for the design, construction and maintenance of
accesses onto Weld County road rights -of -way and requires the issuance of an access permit prior to construction.
Sec. 8-14-30. Regulation of access onto County roadways.
A. Access to a Single Parcel. Each parcel shall be limited to one safe (1) access point for safe ingress and egress,
which may be an existing or new shared access, except if allowed pursuant to Subsection E., below.
B Access Permit Required. An access permit shall be required for any of the following:
1. Any person cConstructing a new safe access onto a County road right-of-way, or
2. cReconstructing, paving, altering, relocating, or enlarging an existing access location, or
3. eChanging the use or type of traffic of any existing access locationonto a County right of way, or
14. Increasing the amount of traffic using an existing access location.
the Department of Public Works. Ne
4 the k s-u-ance of an Access Permit.
C. Issuance of Access Permit. Access Permits shall be issued only in compliance with the rules and regulations set
forth in this Article XIV. In no event shall an access be allowed, or permitted, if it is detrimental to the public
health, welfare, and safety. No such work shall commence prior to the issuance of an Access Permit.
D. Emergency Access Allowed. Police, fire, ambulance and other emergency providers may have direct
emergency access to County roadways, on a case -by -case basis, if no other access is permitted. If allowed, the
emergency access shall be gated and include a Knox box, or other types of safety improvements.
E. Additional Access. Additional accesses to a parcel may be allowed if the applicant demonstrates a need for
more than one access, they proposed accesses comply with the spacing criteria for that road, and no other
safety concerns exist (e.g. sight distance concerns). If a new access is requested that does not meet the spacing
criteria to a legal parcel where an existing access already exists, the additional access shall not be approved
unless the denial of the new access would create undue hardship on the property owner, as determined by
the Department of Public WorksWeld County. Whenever multiple accesses to a single legal parcel exist, and
additional accesses are requested, one (1) or more existing accesses must be removed, minimizing new
accessesaccesses, and utilizing existing accesses.
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 71 of 140
F. Access Permit a Condition of Building Permit.
1. When a new or upgraded access location is to be constructed in conjunction with the any construction
authorized by a building permitof a new principal structure, the issuance of an access permit shall be a
condition for obtaining a building permit for such construction.
1.2. When Tthe property owner intends to use a Historical Access Location in con unction with any construction
authorized by a building permit, the property owner shall will be asked to apply for a new access permit for
any existing access location never previously permitted. Unless otherwise required by this Article 14XIV-ef
Chapter 8, such access permit shall not require the closure, relocation, upgrade, or any other physical
change to the Historical Access Location and shall be for the purpose of identifying the Historical Access
Location. In that circumstance the property owner shall not be charged an access permit application fee.
G. Definitions.Changes in Use, Classification/Type or Increase in amount of Traffic. When an existing access
location changes, there is a change in use of the access classification/type, or an increase in the amount of
traffic using an access, a new access permit shall be required as a condition of the change in use. If a new
intenance agreement
access permit, where applic
ct-u-ra1 modifications, re+ el-+ng, land use change, expansion of
an existing business, change in zoning, change in lot lines, and creation of new parcels.
Access means the physical location where vehicles enter onto a the maintained County road right-of-way.
Change in Type of Traffic means a change to the type of vehicles that use the existing access location, including
but not limited to, a change from passenger vehicles to semi -trucks, or a change from agricultural equipment
to passenger vehicles.
Change of Use means a change in how a parcel that accesses onto a County road right-of-way is used,
regardless of whether the parcel is within the unincorporated part of the County. Change of Use includes the
construction of additional principleprincipal structures (e.g. homes, offices, etc.:, the increase of intensity of
an existing use 'e.g. expansion of an existing business, etc.), change in zoning, change in lot lines, creation of
new parcels, and other land use changes. Change of Use does not include construction of accessory structures,
remodeling of existing structures that does not increase traffic to the site, or similar changes.
Historiccl Access Location means an unpermitted access that was constructed and in -use prior to the date that
this Access Code was originally approved, July, 1, 2010. Unless there is a safety concern, Historical Access
Locations may continue to be used in the manner they were historically used prior to that date. Andy Change
of Use, Change in Type of Traffic, increase in amount of traffic, or change to the physical location of the
Historical Access Location e.g. enlarging, reconstructing, paving, or otherwise altering) shall require a new
access permit.
Illegal Access means an unpermitted access that has been constructed or used when otherwise required to
obtain an access permit. Illegal Accesses do not include Historical Access Locations that are used in the manner
they were historically used prior to the original approval of this Access Code.
H. Access Approval as a Condition of a Land Use Case. When an new, existing, or shared access is to be utilized in
conjunction with a land use case, the plat map shall identify the preliminary approved access location prior to
recording the plat. The property owner shall apply for an access permit when ready to construct the access
and may be required to enter into an improvements and road maintenance agreement. For the purposes of
.,If
property under the processes listed io Chapter 23 of this Code, division of properties, pursuant to the
Chapter 27 of this Code.
Access Spacing Criteria. The following Table 1 reflects the minimum access spacing criteria for county roadways
and intersections.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 72 of 140
Table 1 - Minimum Access Spacing Criteria (Feet)
Access Element
Arterial
Collector
Local
Distance
between intersections
Signalized
2,640
N/A
N/A
Unsignalized
1,320
1,320
333
intersections
Distance
between accesses and
660
660
330
Distance
between
access
points
660
330
150
Distance
subdivisions
between access
points in
660
330
75
Closure/Upgrade/Relocation of Accesses Presenting Safety Concerns. Weld County has the authority to order
an existing access location (whether permitted, historical, or illegal) to be closed, upgraded, or relocated
whenever it determines that a significant safety concern exists. Such action shall be made at the property
owner's expense.
Sec. 8-14-40. Access permit application process.
A. Submittal Requirements; Complete Application. An application for an access permit shall be considered
complete if it is submitted on the required form, includes all mandatory information, including all supporting
materials and is accompanied by the applicable fee. The application must be signed by the property owner or,
if applicable, an authorized agent. Written authorization to act on the property owner's behalf may be
accepted if the access application is not signed by the property owner. If an application is determined to be
incomplete, the Department of Public WorksPlanning Services shall provide written notice to the applicant,
along with an explanation of the application's deficiencies. No further processing of the application shall occur
until the deficiencies are corrected in a future resubmitted application. An application which is determined to
be incomplete may or may not retain its same processing cycle.
B Subdivision or Common Development Plan Access. Upon approval by its Director, the Department of Public
WorksWeld County may require one (1) access permit at the location where the proposed common
development plan or subdivision accesses to the County road to reduce the administrative burden on staff and
applicants requesting permits concurrently for multiple lots. Such "development access" is subject to a
development review application.
C. An access permit fee shall be paid, in full, at the time of the access permit application. The fee for an access
permit shall be determined by resolution or ordinance of the Board of County Commissioners and shall be
shown on the access permit application.
D Review Process. The application and information provided by an applicant for an access permit shall be
reviewed by the Department of Public WorksWeld County. The application may be reviewed by other
multiple departments or agencies to verify compliance with any applicable laws and codes. If the Department
of Public WorksWeld County finds the information and supporting documentation in the application for an
access permit conforms to the policies and requirements set forth in this Article XIV, meets the requirements
defined in the Weld County Engineering and Construction Criteria, as shown in Appendix 8-Q, or in other
pertinent laws, regulations or ordinances, and that all required fees have been paid, an access permit shall be
issued to the applicant.
E Changes in Approved Permit. An approved permit shall not be changed, modified or altered without written
authorization from the Department of Public WorksWeld County. All work shall be done in conformance with
the approved permit.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 73 of 140
F Permit Limitations. An approved access permit expires after one (1) year from its date of issuance and requires
the permit holder to meet the specifications and general engineering standards of the Weld County
Engineering and Construction Criteria, as shown in Appendix 8-Q. The Department of Public WorksThe proper
Weld County staff shall be responsible for ensuring compliance with such specifications and standards.
G WOGLA Access Permit. An approved WOGLA access permit expires after three (3) years from its date of
issuance and requires the permit holder to meet the specifications and general engineering standards of the
Weld County Engineering and Construction Criteria, as shown in Appendix 8-Q.
(Weld County Code Ordinance 2019-09 )
Sec. 8-14-50. Permit holder's general responsibilities.
A permit holder is responsible to comply with the general provisions of this Code, including temporary accesses
permits issued for the following items: Additional requirements and more detailed information are shown in the
special provisions of the access permit.
A. Utility Locates. The permit holder shall be responsible for contacting the Utility Notification Center of
Colorado (811) for utility locates at least seventy-two (72) hours in advance of the access construction,
if excavation is required.
B. Traffic Control. Access construction activities should not interfere with traffic on County roadways. If
interference with traffic is necessary, a traffic control plan shall be submitted to, and approved by, the
Department of Public Works as part of thea rRight-of-Wway Ppermit application. All traffic control shall
conform to the most current version of the Manual on Uniform Traffic Control Devices standards, which
is available for review on the Federal Highway Administration website. All regulatory signs require
approval of the Board of County Commissioners. If applicable, the permit holder shall be required to
install all necessary signage and shall bear all expenses for the fabrication and installation of road name
signs, permanent barricades, and signs required as part of a development project (e.g., one way, no
parking, no outlet, stop sign, speed limit, etc.).
C. Drainage Interference. A permit holder shall not obstruct the natural free and clear passage of water
along the roadside ditch flow lines or other waterways. If surface drainage is to be affected, the permit
holder is responsible for the proper disposition of the runoff in accordance with Section 8-11-40 of the
Chapter.
D Tracking control. Permanent vehicle tracking controls provide stabilized site access where vehicles exit a
location onto a paved road. Vehicles are required to perform a complete revolution of all tires prior to
e rtering a County -maintained roadway. Effective vehicle tracking control helps remove sediment (mud
o r dirt) from vehicles. Commercial, industrialindustriall or high traffic volume accesses shall provide
permanent tracking control devices, which include, but are not limited to, double cattle guards or a
paved (asphalt/concrete) tracking pad extending three hundred (300) feet into the site to mitigate
irr pacts to the paved road, including damages and/or offsite tracking of mud or other materials.
Requests for temporary tracking control techniques must be approved by the Department of Public
WorksWeld County prior to installation. Temporary tracking control shall be used during construction
unless permanent tracking control is installed ahead of construction activities; such devices include, but
are not limited to, crushed natural aggregate (recycled crushed concrete or asphalt shall not be used for
ary vehicle tracking pads) along with a geotextile fabric or pre -fabricated vehicle tracking pads with
approved dimensions. Use -by -right permitted agricultural accesses are exempt from tracking control
requirements. Tracking control is required for construction of accesses to prevent tracking from the site
o nto paved public roadways. The permit holder may be held financially responsible for damage to the
roadway resulting from inadequate tracking control. All tracking control devices and designs must be in
accordance with the Weld County Engineering and Construction Criteria, Appendix 8-Q.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 74 of 140
E. Access Construction, Restoration and Clean-up. The permit holder is responsible for installation of the
correct culvert size(s), materials, and the cost of installation for new access culverts whenever the
installation of a culvert is made necessary by the creation of a new access from private property to a
county roadway. Accesses should be constructed in a manner that minimizes erosion and does not result
in disposition of silt and debris upon the county roadway or roadside ditches. Accesses which slope down
toward the County road will be constructed to assure that water does not run onto or across the traveled
public way. This may include designing the crown, borrow ditches, pans, or other elements so that they
direct water to the existing drainage facilities along the road. The permit holder shall assume all
responsibility for removing all debris associated with the access construction activities and restoring the
County roadway to pre-existing conditions. The access permit may allow construction of the access
without the need for obtaining a separate RI ight-of-Wway Use Ppermit pursuant to this Chapter.
Installation of commercial/industrial access(es) may require a traffic control plan to be approved with
the access permit. the permit holder, upon notification from the Department of Public Works and/or
Planning Services, shall correct any items not consistent with the approved access permit within fourteen
(14) days. If the permit holder fails to restore the road right-of-way in the manner and to the condition
required by the Departments of Public Wes, the County may remove the access or perform the
restorations and invoice the permit holder for the expense(s) incurred by the County.
F Access Sight Distance. Sight distance is essential to protect the traveling public at all access points along
County roadways. Sight distance is the length of roadway that is clearly visible to the driver and is
dependent upon the height of the driver's eye above the road surface, the specified object height above
the road surface, and the height of sight obstructions within the line of sight. The minimum sight distance
available on a roadway must be sufficient to enable a vehicle traveling at or near the design speed to
stop before reaching a stationary object. In evaluating the overall performance of a roadway, both the
horizontal and vertical sight distances must be considered. When items such as walls, buildings, bridge
piers, cut slopes, or vegetation growth are near the roadway on the inside of a curve, they can block a
driver's view of the road ahead. If they are too close, the driver will not have sufficient distance along
the curved roadway to stop when a hazardous condition comes into view. The minimum requirements
and technical criteria for sight distance are in the Weld County Engineering and Construction Criteria
Manual, Appendix 8-Q.
Sec. 8-14-60. Variance from specific access permit requirements.
A property owner may request a variance from specific requirements set forth in this Article XIV.
Department of Public WorksWeld County will consider requests for variances on a case -by -case basis. Requests for
variances may be submitted in a written letter to tic WorksPlanning Services addressing the hardship or
justification for the variance and supporting documentation to explain why they cannot comply with the
requirements of this Article or as outlined in the Weld County Engineering and Construction Criteria, Appendix 8-Q.
Requests will be reviewed and acted upon by the Public WorksPlanning Services Director or designee to ensure they
will adequately protect the public health, safety, and welfare. Public WorksWeld County staff will respond with an
approval or denial in writing within thirty (30) days of receipt of the variance request.
Sec. 8-14-70. Appeal of denial of access permit.
If an access permit is denied by Weld County staff, or the applicant objects to
any of the terms or conditions of a permit thereby placed by the DepartmentCounty, the applicant has the right to
appeal the decision to the Board of County Commissioners, in writing, utilizing the appeal procedures set forth in
Section 2-4-10 of this Code.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 75 of 140
Sec. 8-14-80. Enforcement.
A. Violations and Penalties. The County, through the Department of Public WorksPlanning Services or other
departments so authorized, may enforce this Article XIV through methods included in this Section, or through
other methods adopted by the Board of County Commissioners.
B. Criminal Penalties.
1. It is unlawful to construct a new access onto a County road, or reconstruct, pave, alter, enlarge or change
the use of any existing access onto a County -maintained road unless an access permit is first issued. Any
person, firm or corporation violating any provision of this Article XIV is guilty of a Class 2 petty offense,
which, upon conviction thereof, shall be punishable by a fine of three hundred dollars ($300.00) or by
imprisonment in the County jail for not more than ten (10) days, or by both such fine and imprisonment,
for each separate violation. Each day during which such work on an illegal access continues shall be
deemed a separate offense.
2. Whenever the Department, of Public Works and/or Planning Services, through one (1) of its employees,
has personal knowledge of any violation of this Article XIV, it shall give written notice to the violator to
correct such violation within sixty (60) days after the date of such notice. Should the violator fail to
correct the violation within such sixty (60) day period, the Departments of Public WorksPublic Works
and/or Planning Services may request that the Sheriff _s Office issue a summons and complaint to the
violator, stating the nature of the violation with sufficient particularity to give notice of said charge to
the violator. The summons and complaint shall require that the violator appear in court at a definite time
and place stated therein to answer and defend the charge. One (1) copy of said summons and complaint
shall be served upon the violator by the Sheriff s Office in the manner provided by law for the service of
a criminal summons. One (1) copy each shall be retained by the Sheriff's Office and Department of Public
WorksPlanning Services and one (1) copy shall be transmitted to the Clerk of the Court. The County may
install barriers across or remove any access not conforming to this Article XIV during the pendency of the
enforcement action.
3. It is the responsibility of the County Attorney to enforce the provisions of this Section. In the event the
Board of County Commissioners deems it appropriate, the Board of County Commissioners may appoint
the District Attorney to perform such enforcement duties in lieu of the County Attorney.
4. Any arresting law enforcement officer shall follow the penalty assessment procedure provided in Section
16-2-201, C.R.S., for any violation of this Article XIV.
C Revocation of Access Permit. Should the applicant or any subsequent property owner fail to abide by the terms
of any associated improvements agreement, the Board of County Commissioners may revoke the access
permit. Such revocation may subject the applicant or any subsequent property owner to the penalties outlined
in this chapter, or any other enforcement mechanism provided by law.
D. Equitable Relief in Civil Action. In the case of any violation of this Article XIV, the County Attorney, in addition
to the other remedies provided by law, ordinance or resolution, may institute an injunction, mandamus,
abatement or other appropriate action or proceeding to prevent, enjoin, abate or remove such violation.
E Civil Penalties. In addition to any of the penalties set forth above, any person, firm or corporation violating any
such regulation, provision or amendment thereof or any provision of this Article XIV may be subject to the
imposition, by order of the Weld County Court, of a civil penalty in an amount of not less than two hundred
fifty dollars ($250.00) nor more than five hundred dollars ($500.00). It is within the discretion of the County
Attorney to determine whether to pursue the civil penalties set forth in this Article XIV, the remedies set forth
above, or both. Each day after the issuance of the order of the Weld County Court, during which such unlawful
activity continues, shall be deemed a separate violation and shall, in accordance with the subsequent
provisions of this Section, be the subject of a continuing penalty in an amount not to exceed fifty dollars
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 76 of 140
($50.00) for each such day. In no event shall civil penalties, imposed pursuant to this Subsection, constitute a
lien against the real property.
F Inspections. The Department_; of Public Work YPublic Works and/or Planning Services or other County
departments may conduct an inspection of each access that is the subject of the access permit to ensure full
compliance with all provisions of this Article XIV and the terms of the permit.
G Failure to Comply with Requirements of Issued Access Permit. Failure of the permit holder to comply with any
of the terms and conditions of an issued access permit shall be sufficient cause for cancellation of the permit
and may result in the removal of the access and its appurtenances by the County at the permit holder's
expense.
H Access Permit Issued Erroneously or Upon Incorrect Information. Any access permit which has been issued in
error or on the basis of incorrect information supplied by the permit holder, shall be considered void. In the
event an access permit is void, no refund of permit fees shall be made unless the access permit was issued in
error by the Department of Public WorksWeld County staff.
Notice Regarding Illegal Access. An "illegal access" is considered to be any access not pc
or to 2010 should obtain an access permit at no charge. For an illegal access, the
property owner shall be sent written notice of any illegal access location or use. The owner shall be given sixty
(60) days notification of pending actions, after which the County may install barriers across, or remove, any
access not conforming to this Article XIV. Any access, driveway or curb -cut being constructed within County
road right-of-way without an approved access permit shall be required to stop work immediately and apply
for an access permit. If the permit is approved, work may continue subject to the conditions of the permit. If
the permit is denied, any work that has been completed must be removed and the road and drainage facilities
returned to pre-existing conditions acceptable to the Department_,, of Public Works and Planning Services,
upon completion of any appeal or the time for appeal pursuant to the provisions of Section 8-14-70, above.
(Weld County Code Ordinance 2019-09 )
Sec. 8-14-90. County authority.
Notwithstanding the issuance of any access permit or the construction of any access, Weld County reserves
the right to make any changes, additions, repairs, conditions, and relocation or closure of any part of an access within
the County road right-of-way at any time, including, but not limited to, in connection with the relocation,
reconstruction, widening and maintaining of the road or road right-of-way, without compensating the owner of the
access for the damages to or destruction of the access.
Sec. 8-14-100. Access Control Plans (ACP's), and additional techniques and requirements for
access on County roads.
A. Access Control Plans. The purpose of an Access Control Plan (ACP) is to maintain and enhance the safety and
mobility of a corridor while also providing reasonable access to adjoining properties. Each intersecting
driveway and street are an access point that increases the potential for conflicts between through -traffic and
traffic using the access. Access management is important for protecting the public health, safety, and welfare
by enhancing the safety, mobility, and reliability of the transportation system. An ACP establishes and
documents standards and policies for developing a roadway corridor through cooperation among the
stakeholder local governments and agencies in the vicinity. ACP's are typically developed by one (1) or more
local governments and/or agencies or, in some cases, prepared on their behalf by a consultant. Local
governments and agencies agree to adhere to the standards and policies of the ACP and the ACP places
responsibilities on owners and/or lessees of property along the corridor. Weld County recognizes that property
owners have a right of reasonable access to the County road system. However, within an environment where
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 77 of 140
development promotes population and employment growth, impacts to the roadway network are inevitable.
Increasing traffic volumes will affect mobility by raising travel times and de►ays in the system, increase safety
concerns due to a greater potential for crashes at intersections and access points along the road, and impact
travel reliability due to higher numbers of incidents and accidents. Roadway improvements, such as widenings
may address many of the roadway capacity and travel delay issues associated with land development. Traffic
signal and roundabout installations can improve safety and mobility at intersections. Access management
along a corridor will likewise have positive impacts on safety and mobility by reducing potential conflicts and
delays in the travel stream. As development occurs and roadway improvements are made along a corridor,
access management techniques are applied to decrease the number of access locations if possible and reduce
the impact to mobility through design standards and mitigation improvements such as auxiliary/turning lanes.
On corridors with an adopted ACP in effect, recommendations for each existing and future access location and
policies that guide future access management efforts will be enforced.
B. Access Operational Movements. When a safety concern is present at an existing or proposed access, Weld
County may restrict or modify the type of access operation to ensure traffic safety movement at the access.
1. Full Movement Access. A►► potential movements for the access are allowed.
2. Three -Quarter Access. All movements allowed except a left turn out of the access.
3. Right-in/Right-out Access. Only right turn in and right turn out movements are allowed.
C. Access Control Techniques. A reduction in accesses onto a County road will improve traffic flow, operations,
and safety of the traveling public. To reduce the number of existing access points, applicants may be required
to implement the following access control techniques to reduce conflicts while maintaining adequate access
to adjacent land uses.
1. Elimination. Applicants may be required to eliminate accesses identified as unsafe locations, where there
are more than two (2) existing accesses for a parcel, or do not meet spacing requirements identified in
the Weld County Engineering and Construction Criteria documentManual (Appendix 8-Q).
2 Relocation. Applicants may be required to move or relocate existing accesses to a new location to either
align with other existing accesses or to meet spacing requirements.
3 Consolidation. Applicants may be required to consolidate multiple accesses into a single access or
coordinate with neighboring property owners to consolidate existing accesses into shared accesses,
whenever feasible.
4 Movement Conversion. Applicants may be required to convert their access movement through medians
treatments to eliminate some or all turning movements in order to reduce the number of conflicts
between left turning vehicles and through vehicles on the roadway.
D Access Types. Access type refers to the land use on the adjoining property that the access serves. An approved
access permit helps establish the access use and existing level of intensity to the property. The following access
types are the most common in Weld County:
1. Agriculture/Field/Ditch Access. Support farm and ranch operations with a low trip generation generally
used during planting and harvesting seasons.
2 Residential Access. Driveways to residences and are considered a low trip generation with approximately
ten (10) vehicle trips per day.
3 Commercial/Industrial Access. Serves businesses, schools, oil and gas facilities and are considered to
have heavier vehicles (ESALs) and/or high trip generation.
4 Multiple Use Access. Shared accesses where two (2) or more access types utilize the same access.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 78 of 140
5. Future Access. These locations may have been previously approved but has yet to be constructed or may
be an existing parcel that cannot obtain access to a side road and would otherwise be considered
landlocked but fall into the requirement of being afforded one access per parcel.
6. Temporary Access. Road access which will be closed after being used for a limited time may be
considered a temporary road access. A temporary access permit may be granted by the Department only
if the temporary access meets minimum County traffic safety and operational requirements, including
sight distance and is not intended to exceed eighteen (18) months.
E. Auxiliary Turn Lanes. Auxiliary lanes maintain the safety, traffic flow, and operation of a roadway or access.
Auxiliary lanes are required when unique location factors exist such as roadway speed and traffic density,
access volume, the volume of commercial trucks, the influence of nearby accesses, existing auxiliary lanes close
to the proposed access, nearby traffic control devices, available stopping sight distance, and cther topographic
or roadway design factors. When applicable, the access permit holder is responsible for design, installation,
any road right-of-way acquisition needed to accommodate the required lane width. Required auxiliary turn
lanes must be installed according to the following traffic triggers:
1. A left deceleration lane with storage length plus taper length is required for any access with a projected
peak hour left ingress turning volume greater than ten (10) vehicles per hour (vph). The design elements
for a left turn lane are the taper length, lane length, and storage length which in combination make up
the left turn lane.
2. A right deceleration lane with storage length plus taper length is required for any access with a projected
peak hour right ingress turning volume greater than twenty-five (25) vph. The design elements for right
turn and deceleration lanes are the approach taper, lane length, and storage length which in
combination make up the right turn lane.
3 A right turn acceleration lane with taper is required for any access with a projected peak hour right
turning volume greater than fifty (50) vph and a single through lane in the direction of the right turn. The
design elements for a right acceleration lane are the transition taper and acceleration length.
4 A left turn acceleration lane with transition taper may be required if it would benef t the safety and
operation of the roadway. A left turn acceleration lane is generally not required when the acceleration
lane would interfere with the left turn ingress movements to any other access. Further auxiliary lane
design criteria can be found in the Weld County Engineering and Construction GuidelincsCriteria Manual
(Appendix 8-Q).
F Closure or Elimination of access. When an access is closed, abandoned or eliminated the permit holder shall
assume all responsibility for any activities related to the closure/elimination and reclamatior of access points
stipulated to be removed. In the event the issuance of an access permit requires an existing access point to be
"closed and reclaimed" it shall be completed by the stipulated date on the permit. If the county is closing an
access, the property owner will be notified in writing, prior to the closure occurring of the date the County will
close the access. Closure and reclamation activities may include, but are not limited to, reestablishing the
profile of the burrow ditch, removing any culverts and gates in the fencing adjacent to the maintained road
right-of-way, and attempting to reseed the affected area located in the road right-of-way with natural
vegetation to the satisfaction of the Departments of Public Works and Planning Services.
G Roadway Improvements. Projects with high traffic/trip generation or a crash h-i-story safety concerns may
require public improvements; including but not limited to, auxiliary lanes, such as acceleration and
deceleration lanes, exclusive left or right-hand turn lanes, or a traffic signal, in accordance with the Weld
County Engineering and Construction Criteria Manual, as shown in Appendix 8-Q. If these types of roadway
improvements are required, the permit holder will be responsible to enter into an improvements agreement
with collateral. The agreement shall be approved by the Board of County Commissioners.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 79 of 140
H Road Maintenance Agreements Accesses may require a road maintenance agreement or a temporary
construction maintenance agreement as a condition of granting the access permit Possible mitigations shall
be set forth in the maintenance agreement The agreement shall be made in conformance with the County's
policy for improvements agreements The agreement shall be approved by the Board Violation of the road
maintenance agreement will constitute a violation of the permit and may subject the applicant to revocation
of the permit and/or other enforcement
(Weld County Code Ordinance 2019-09-)
Created 2022-02-24 12 36 45 [EST]
(Supp No 76)
Page 80 of 140
CHAPTER 8 - Public Works
ARTICLE XV Transport Permits
ARTICLE XV Transport Permits
Sec. 8-15-10. Intent of Transport Permit Policy.
Weld County strives to keep its roadways and bridges safe and in a state of good repair and free from
unnecessary encumbrances The Weld County Transport Permit is required for Extra -legal vehicles using Weld
County roadways to ensure the operation and movement of Extra -legal Vehicles and Loads occurs in a safe and
efficient manner Weld County Transport Permits issued shall include restrictions or conditions including, but not
limited to, establishing routes, enforcing a time of day for travel, and/or requiring Extra -legal Vehicles/Loads to be
accompanied by pilot escorts in an effort to protect the health, safety and welfare of the traveling public This policy
shall apply within all unincorporated areas of Weld County as of the effective date of this Article This policy is
enacted pursuant to C R S § 42-4-510 and § 42-4-511(2)(a), applicants are responsible for complying with the terms
of this and other applicable local, state, and federal laws
Sec. 8-15-20. Purpose.
The purpose of this Article is to allow for the safe movement of Extra -legal Vehicles and Loads on county
roadways and protecting the health, safety, and welfare of the traveling public, maintaining efficient traffic flow,
while preserving the integrity of county roadways and bridges
Sec. 8-15-30. Definitions.
For the purpose of this Article, the following terms, phrases, words, and their derivations shall have either their
common sense meaning, or the meanings given herein
Applicant An individual, firm, partnership, corporation, or association submitting an application for a
Transport Permit
Department Weld County Public Works under authority of the Board of County Commissioners
Extra -Legal Vehicle and Load An overweight, over length, over height vehicle or load exceeding the Legal
Limits as set by Federal and State of Colorado guidelines as defined in C R S §§ 42-4-502 through 42-4-509
Hours of Darkness Sunset to Sunrise
Hours of Daylight Sunrise to Sunset
Inclement Weather Weather conditions that impede safe travel such as high winds, fog, snow, heavy rain, icy
roads, high water, limited visibility, etc
Legal Limits The size, weight, and height limits for a vehicle or load as defined in C R S §§ 42-4-502 through
42-4-509
Maximum Limits The maximum size, weight, and height limits that may be allowed by a Transport Permit for
an Extra -legal Vehicle or load
Restricted Bridge Map A map prepared by the Department indicating Load posted bridges
Roadway A strip of land that is granted through easement, petition, or other mechanism and is maintained
for Public transportation purposes
' Rules Rules and Regulations as determined by this Article in addition to the Rules and Regulations of the
Colorado Department of Transportation, 2 C C R 6014
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 45 [EST]
Page 81 of 140
Transport Permit: A license granted by Public Works to move or operate Extra -legal Vehicle or Load on a county
road.
Sec. 8-15-40. General provisions.
A. Transport Permit Necessary. A Weld County Transport Permit is required for any movement of an Extra -legal
Vehicle or Load occurring on Weld County roadways, as defined in this Article.
B Issuance of a Transport Permit. An Extra -legal Vehicle or Load shall not operate or move on a county road,
except by Permit as provided in this Article. The Department may, upon application in writing, issue a Single -
trip, a Special, an Oil Rig, or an Annual Transport Permit authorizing the Applicant to operate or move an Extra-
legal Vehicle or Load. All permits shall be issued at the discretion of the Department. In the Permit, the
Department may include, but is not limited to, the following conditions:
1. Limit the number of trips and/or establish other time limitations of operation.
2. Limit or prescribe conditions of operation when necessary to protect the safety of the travelling public,
the efficient movement of traffic, or the county roads from undue damage.
3 Require pilot escorts and/or Law Enforcement to accompany loads with dimensions exceeding
maximums.
4. Establish travel routes.
5. Excessive loads as identified by Public Works Staff will be required to submit a route assessment including
a before and after structure analysis prepared by a State of Colorado licensed Structural Engineer. These
loads may require security to cover costs of potential repairs.
6. Required Security, in the form of a Surety Bond or Letter of Credit, or other payment as approved by the
Department for moves that may have the potential to cause damage to roads or structures within the
roads. Whether or not covered by a security, the Permit Holder shall reimburse the County for any and
all expenses incurred by the County as a result of, or related to, failure by the Permit Holder to perform
the transport in compliance with the Weld County Code and other applicable law.
7 Travel routes may require build outs of turning radii or other road improvements necessary to
accommodate movement of the Vehicle/Load. A --bight-of-''.`sr, ay Use pPermit may be applicable.
The Applicant shall be responsible for the safe movement of the permitted Extra -legal Vehicle or Load and all
terms and conditions of the Rules.
D. Since many of these routes are connecting from other agencies or counties, the Applicants shall not only
adhere to the guidelines stated in this Article, but all other applicable Federal and State of Colorado rules,
regulations, and laws pertaining to Transport Permits for the movement of Extra -legal Vehicles.
E Exceptions. For communication purposes, and when feasible, the Department requests to be notified in
advance or during a transport if any of these exceptions occur. The following are allowable exceptions to the
Rules:
1. Emergency moves, as directed by emergency personnel, of an Extra -legal Vehicle or Load are exempt
from the requirements of obtaining a Transport Permit when it is necessary to move the Extra -legal
Vehicle or Load out of danger and for the protection of the travelling public.
2. Towing carriers may transport a disabled Extra -legal Vehicle or Load from the point of break down or
crash to a place of safe keeping.
3. Any move of an Extra -legal Vehicle authorized by Local, State, Federal Law Enforcement or Military
personnel.
Created: 2022-02-24 12:36:45 [EST]
(Su pp. No. 76)
Page 82 of 140
(Weld County Code Ordinance 2019-12)
Sec. 8-15-50. Transport permits types.
The following Transport Permits are available as determined by the Department of Public Works for the
movement of Extra -legal Vehicles and Loads on roadways under Weld County jurisdiction:
A. Single Trip Permit: A permit valid for a single one-way trip for Extra -legal Vehicles and Loads that do not
exceed Maximum Limits allowed by the Rules.
B Special Permit: A permit valid for a single one-way trip issued to Extra -legal Vehicles or Loads that exceed
the Maximum Limits allowed by the Rules.
C Oil Rig Permit: A permit valid for Extra -legal Vehicles and Loads associated with an Oil Rig Move. All loads
pertaining to the specified rig and its location are covered under the issued permit.
D. Annual Permit: A permit valid for one (1) year from the date of issuance for Vehicles or Loads that do not
exceed Maximum Limits allowed by the Rules.
E Annual Overweight (OW) Divisible Permit: A permit valid for one (1) year from the date of issuance for
Quad Axle and/or Tandem/Triple Axle Divisible Vehicles or Loads.
ce for Applicants with ton (10) or
more Vehicles of which may not exceed Maximum Limits for Annual Permits.
Sec. 8-15-60. Transport permits application information.
A. The Maximum Limits authorized for Annual Extra -legal Vehicles or Loads are as follows:
1. Two hundred thousand (200,000) pounds Gross Vehicle Weight and must meet Federal Bridge Formula
requirements for axle loading.
2. Si*teenSeventeen (1617) feet in Width.
3. Sixteen (16) feet in Height.
4. One hundred twenty (120) feet in Length.
5. Twenty-five (25) foot front Overhang.
6. Thirty-five (35) foot rear Overhang.
B The Maximum Limits that may be authorized for an Extra -legal Vehicle or Load operating under the Annual
Overweight (OW) Divisible Permit are as follows:
1. One hundred ten thousand (110,000) pounds subject to Bridge limitation map. Vehicle must be
configured with a Quad Axle grouping.
2 Ninety-seven thousand (97,000) pounds subject to Bridge limitation map. Vehicle must be configured
with a Tandem/Triple Axle grouping on trailer.
3. Height, Width, and Length shall not exceed Legal limits and maximums.
C. Hours of Darkness. An Extra -legal Vehicle or Load more than fourteen (14) feet in Width is prohibited from
travelling from Sunset to Sunrise unless authorized as a Provision on the Transport Permit.
D Holidays. Refer to Colorado Department of Transportation Rules and Regulations Chapter 4 (404.3).
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 83 of 140
E. Convoying. Convoying is not permissible on Weld County roadways unless specified as a special condition on
the permit. A minimum distance of one-half mile shall be maintained at all times.
F Staging. Vehicle staging/parking on Weld County roadways is not permitted, except at designated pull off
areas. Staging on the Weld County Highway is not permitted without permission from the Department.
(Weld County Code Ordinance 2019-12)
Sec. 8-15-70. Transport permit application process.
A. Applicant must apply to the Department of Public Works to obtain a Transport Permit.
B. Submittal Requirements. Applicant must submit a complete application form, required submittals, and fee to
the Department for review. Required submittals may include, but are not limited to:
1. Route survey and axle configuration drawing.
2. Pilot escort information.
3. Traffic control plan.
4. Professional Engineer's analysis report for structures.
5. Copies of Permits or Permissions from related agencies or municipalities included within the submitted
route.
6. Public notification.
7. Public Utility clearance letter.
8. Certificate of Authentication (for Mobile Homes only).
9. Right -of -Way Use Permit.
10. Transport Fee.
C. Review Process. The application and submittals filed by the applicant for a Transport Permit shall be reviewed
by the Department of Public Works. The application may also be reviewed by other departments or agencies
to verify compliance with any applicable laws. If an application is determined to be incomplete, the
Department of Public Works shall provide notice to the applicant, along with an explanation of the application's
deficiencies. No further processing of the application shall occur until the deficiencies are corrected in a future
resubmittal. An application which is determined to be incomplete may or may not retain its same processing
cycle.
D. Permit Issuance. If the Department finds all requirements and regulations set forth in this Article have been
satisfied, and all fees have been secured, a Transport Permit will be issued.
E Changes to an Approved Permit. An approved Transport Permit shall not be changed, modified, or altered
without written consent from the Department of Public Works.
F Permit Expiration.
1. Single -trip Permits and Special Transport Permits expire within three (3) days from the approved move
date. If a longer time period than three (3) days is granted, the Permit will expire accordingly based on
the move date.
2 Oil Rig Permits expire tenfive (--05) days from the date of issuance.
3 Annual Permits expire one (1) year from date of issuance.
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 84 of 140
G Permit extension An applicant may request an extension of time for a Single -trip, Special Transport, or Oil Rig
Permit if the move is unable to begin due to good cause There shall be an extension fee assessed to cover
administrative costs
(Weld County Code Ordinance 2019-12)
Sec. 8-15-80. Applicant's general responsibilities.
A Applicant is responsible for all compliance with Rules as set in this Article, Permit, and Permit Provisions
B Applicant is responsible for maintaining compliance with all Federal and State Highway Commercial Vehicle
rules
C Applicant is responsible for obtaining all necessary Permits and Permissions from all Authorities, property
owners, other jurisdictions, or other affected parties located within the intended haul route boundaries
D Applicant shall have an original copy, or verifiable electronic copy of the Transport Permit available when
operating on Weld County roadways
E Indemnification The Permit Holder, its agents, employees, subcontractors, contractors and assigns hereby
agrees to hold Weld County, Colorado, the agencies thereof and their officers and employees harmless from
any and all loss and damage or any claims which may arise out of, or be connected with, the Special Transport
Permit, excluding any such loss and damage or any claims (including consequential damages) which may be
caused solely by the negligence of the County, the agencies thereof or its officers and employees
F Insurance The Permit Holder shall secure and maintain insurance policies that will protect them, their
subcontractors and the County from claims for bodily injury, death or property damage which may arise from
the transport conducted pursuant to this permit Weld County must be named as an "Additional Named
Insured" upon said insurance policies
G Utility Locates The Permit Holder shall be responsible for utility locates at least forty-eight (48) hours in
advance of the transport, for utilities that may be affected during transport The Permit Holder is responsible
for any damages to existing utilities or structures
(Weld County Code Ordinance 2019-12)
Sec. 8-15-90. County authority.
A Special Transport Permit is considered to be a license for use of the County roadways The Department shall
have the authority to suspend and/or terminate the move, wholly or in part, because of the failure of the Permit
Holder to properly execute the move in accordance with this Article Weld County, notwithstanding the issuance of
any Permit in the County roadways, reserves the right to make any changes, additions, or required rerouting of any
special transport vehicles on county roadways at any time, without compensating the owner
Sec. 8-15-100 Transport permit fee.
All required fees shall be paid, in full, at the time of the Permit application submission unless other
arrangements are made The fee for Transport Permits shall be determined by resolution or ordinance of the Board
of County Commissioners and shall be shown on the Transport Permit applications
Created 2022-02-24 12 36 45 [EST]
(Supp No 76)
Page 85 of 140
Sec. 8-15-110 Appeal of denial of a transport permit.
If an application for a Transport Permit is denied or revoked by the Department, or if the applicant objects to
any of the terms or conditions of a permit thereby placed by the Department, the applicant has the right to appeal
the decision to the Board of County Commissioners, in writing, utilizing the appeal procedures set forth in Section 2-
4-10 of the Weld County Code
Sec. 8-15-120. Permit suspension or revocation.
The Department may deny, revoke, or suspend the Transport Permit in order to protect the public health,
safety, welfare, and ensure the safe function of county roadways and bridges Weld County reserves its right to
revoke any Transport Permit without a refund of fees whenever a Permit is issued in error on the basis of incorrect
information supplied by the applicant, or whenever the Applicant is in violation of any rules or provisions of this
Article
If the Department determines the Applicant has committed a substantial breech of a term or condition of any
statute, ordinance, rule, regulation, or any condition of the Permit, the Department shall notify the Applicant of their
suspension or revocation by either a phone call or in writing
Within twenty-four (24) hours of receiving the notification of the suspension, the Applicant shall contact the
Department of Public Works with a plan of correction which must be accepted by the Department Failure by the
Applicant to contact the Department to remedy violations shall result in immediate revocation of the Permit and
termination of the move If a Permit is revoked, the Applicant will be required to re -apply and will be charged for
any applicable fees
Sec. 8-15-130. Enforcement.
A Violations and penalties The County, through the Department of Public Works or other Departments so
authorized, may enforce this Article through methods available in the law, included in this Article, or through
other methods adopted by the Board of County Commissioners
B Criminal penalties
1 Whenever the Department, through one (1) of its employees, has personal knowledge of any violation
of this Article, it shall give written notice to the violator to correct such violation within seven (7) days
after the date of such notice Should the violator fail to correct the violation, the Department may
request that the Sheriff's Office issue a summons and complaint to the violator, stating the nature of the
violation with sufficient particularity to give notice of said charge to the violator The summons and
complaint shall require that the violator appear in court at a definite time and place stated therein to
answer and defend the charge One (1) copy of said summons and complaint shall be served upon the
violator by the Sheriff's Office in the manner provided by law for the service of a criminal summons One
(1) copy each shall be retained by the Sheriff's Office and Department and one (1) copy shall be
transmitted to the Clerk of the Court The County may remove any obstruction or work not conforming
to this Article during the pendency of the enforcement action
2 It is the responsibility of the County Attorney to enforce the provisions of this Section In the event the
Board of County Commissioners deems it appropriate, the Board of County Commissioners may appoint
the District Attorney to perform such enforcement duties in lieu of the County Attorney
3 Any arresting law enforcement officer shall follow the penalty assessment procedure provided in C R S
§ 16-2-201, for any violation of this Article
Created 2022-02-24 12 36 45 [EST]
(Supp No 76)
Page 86 of 140
C Equitable relief in civil action In the case of any violation of this Article, the County Attorney, in addition to the
other remedies provided by law, ordinance, or resolution, may institute an injunction, mandamus, abatement
or other appropriate action or proceeding to prevent, enjoin, abate, or remove such violation
D Civil penalties In addition to any of the penalties set forth above, any person, firm, or corporation violating
any such regulation, provision, or amendment thereof, or any provision of this Article, may be subject to the
imposition, by order of the County Court, of a civil penalty in an amount of not less than two hundred fifty
dollars ($250 00), nor more than five hundred dollars ($500 00) It is within the discretion of the County
Attorney to determine whether to pursue the civil penalties set forth in this Article, the remedies set forth
above, or both Each day after the issuance of the order of the County Court, during which such unlawful
activity continues, shall be deemed a separate violation and shall, in accordance with the subsequent
provisions of this Section, be the subject of a continuing penalty in an amount not to exceed fifty dollars
($50 00) for each such day In no event shall civil penalties, imposed pursuant to this Subsection, constitute a
lien against real property
(Weld County Code Ordinance 2019-12)
Created 2022-02-24 12 36 45 [EST]
(Supp No 76)
Page 87 of 140
CHAPTER 8 - Public Works
ARTICLE XVI Vacation of Road Right -of -Way by Board of County Commissioners
ARTICLE XVI Vacation of Road Right -of -Way by Board of County Commissioners
Sec. 8-16-10. Purpose and intent.
The purpose and intent of this Article is to authorize the Board of County Commissioners to vacate a public
road right-of-way in accordance with Part 3 of Article 2 of Title 43, C.R.S.
(Weld County Code Ordinance 2020-02)
Sec. 8-16-20. Vacation procedures.
The Board of County Commissioners may vacate a public road right-of-way by Resolution, if the Board
determines it to be in the County's best interest, or upon application of an interested landowner submitted to the
Department of Public Works; however, if the proposed vacation of public road right-of-way is within a historic
townsite or subdivision, an application shall be submitted to the Department of Planning Services for a
Resubdivision, pursuant to Chapter 24, Article IX, of the Weld County Code.
Sec. 8-16-30. Vacations of public road rights -of -way not within historic townsites or
subdivisions.
A Complete petitions for vacation of public road rights -of -way not within historic townsites or subdivisions
accepted by the Department of Public Works shall include:
1. A complete Petition Application signed by the petitioner with an accurate legal description of the road
right-of-way requested to be vacated.
2. If an authorized agent is representing the petitioner, an Authorized Agent Form must be submitted with
the application.
3. Affidavit of Interest Owners Form has been completed and signed by petitioner, authorized agent, and
all interested property owners (if applicable).
4. A list of all adjacent property owners within 500 feet or landowners who are not directly adjacent; but
may be affected due to usage of the road right-of-way.
5. Provide evidence of existing utility information.
B Within two (2) weeks of receiving completed petition, the Department of Public Works, in collaboration with
the Clerk to the Board's Office, will send referral requests to the Department of Planning Services, Department
of Public Health and Environment, Sheriff's Office, the fire district, the ambulance service, emergency
responders, neighboring municipalities, and utility companies. The respective departments and agencies have
a minimum of three (3) weeks to review the petition and submit comments.
C. Within six (6) weeks of the petition being received, and at least ten (10) days prior to the meeting at which the
Board of County Commissioners is to consider vacating any public road right-of-way, the Clerk to the Board
shall mail notice of the meeting to all persons owning land adjacent to the roadway to be vacated, including
any landowner who the Department of Public Works reasonably determines may use the road right-of-way
proposed to be vacated to access their property. This notice shall not be required if the public road right-of-
way has not been used as a roadway for at least twenty-one (21) years or since it was established. Inadvertent
errors by the Department of Public Works in determining who should receive such notice, or by the Clerk to
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 88 of 140
the Board's Office in sending such notice, shall not create a jurisdictional defect in the process, even if such
error results in the failure of a property owner to receive such notification.
D. The Resolution vacating the public road right-of-way shall be recorded with the County Cler< and Recorder.
E Upon vacation of the public road right-of-way, title to the land shall vest in the adjacent landowners pursuant
to the provisions of C.R.S. § 43-2-302.
(Weld County Code Ordinance 2021-11)
Editor's note(s) Weld County Code Ordinance 2021-11, adopted July 7, 2021, repealed the forrrer § 8-16-30, and
enacted a new § 8-16-30 as set out herein. The former § 8-16-30 pertained to limitations and derived from
Weld County Code Ordinance 2020-02.
Sec. 8-16-40. Requirements.
A. Petitioner shall pay an application fee, pursuant to Article VII, Permits and Fees - Appendix 5-M Department
of Public Works Permit Application Fees.
B The Board of County Commissioners may approve or deny any request to vacate public road right-of-way as it
determines to be in the best interests of the County. The Board may consider any informat on or evidence it
determines appropriate, including, but not limited to, the following, to be provided by the Department of
Public Works:
1. Existing and future access, and
2. Whether the road right-of-way is a maintained or non -maintained public road, and
3. What the road classification is as identified on the County's current Functional Classification Map, and
4. Whether there is enough information to determine if the public needs this road right-of-way in the future
for items such as utility easements, etc. A title commitment or land survey plat may be required.
C. No public road right-of-way that borders another county or the boundaries of an incorporated municipality
may be vacated without the Resolution of the Board of County Commissioners and the consent of the
governing body of the other county or municipality.
D. No public road right-of-way may be vacated if any adjoining property would be without access (landlocked) by
either public road or private easement.
E The Resolution vacating the public road right-of-way shall reserve rights -of -way or easements for existing
sewer, gas, water or similar appurtenances, for ditches or canals and appurtenances and for e ectric, telephone
and similar lines and appurtenances.
(Weld County Code Ordinance 2021-11)
Created: 2022-02-24 12:36:45 [EST]
(Supp. No. 76)
Page 89 of 140
CHAPTER 8 - Public Works
APPENDIX 8-A RESERVED
APPENDIX 8-A RESERVED4
4Editor's note(s)—Weld County Code Ordinance 2020-03, adopted March 9, 2020, repealed Appendix 8-A, which
pertained to snow removal
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 4S [EST]
Page 90 of 140
CHAPTER 8 - Public Works
APPENDIX 8-B ROAD ACCESS SKETCHES
ROAD
SKETCH
AGGREGATE RASE COURSE
t2� CppVER OR P gg
LO
RECOMMENDATIONS.
DOWN GRADIENT SIAPL POE A
ML$IMUM OP 10'
2%
COUNTY
ROAD
(
PAVEMENT
2%
SHOULDER
OW LINE
i��i�i/��0�����/i�Vi%/`i/��%��%��%/��%��%/��%j��%/��%/��%��%/��%/��%��%/✓��%/��%/��%/����%i���i��G��!/��G��i��li��/��!i�����/�0��i���i��Q��!i��I���� - !I��Q��Q��//��QcW
#.,*** !�`� { /` : /O!/�4 /✓ ��!//////!/�/!/O �t/�//�//�!///�////���/���/�//1��//1 �`!///`\/`!/ !/�//el//�!✓!/*!/,// *,
see4.2 ��✓i�/W /A4d2b:/i:O:/i:/i:/i. A4.4./i /i.0./isO./i./i;✓i&44G.0:/i.✓i:/i.✓i./i:O.Oai:/i:Ii.O././i./2 O.G./i./i./i:W4
NOTE: MIN. PIPE DIAMETER IS 15"
LARGER SIZES MAY BE NEEDED
TO MEET DRAINAGE REQUIREMENTS.
NOTE: LIGHT COMMERCIAL
20' RADIUS
40 L.F. OF 15" DIA. CULVERT OR AS REQUIRED.
CROSS -SECTION
A -A
r-- A
COMMERCIAL
ACCESS
ROAD
24'
CONCRETE HEADWALL
PRECAST OR CAST IN PLACE
CONCRETE HEADWALL
•
ACCESS
40' RADIUS
GRAVEL OR PAVED
SURFACE
AS REQUIRED.
FLOW LINE
SHOULDER
PAVEMENT
WELD COUNTY ROAD
PLAN VIEW
(-or. A
NOTE: ADDITIONAL WIDRNINC Of COUNTY BOAC
TURNING IAA= WAY BR REQUIRED.
- --#4
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 91 of 140
CHAPTER 8 - Public Works
APPENDIX 8-B ROAD ACCESS SKETCHES
ROAD - ACCESS
SKETCH tt2
AGGREGATE BASE COURSE
12- COVER OR PER
MANUFACTURER RECOMMENDATIONS.
DOWN GRADIENT SLOPE POR A
MINIMUM OF ID'
20' RADIUS
ROAD PAVEMENT
2� f 27.
CROSS-SECTION
A -A
PRIVATE PROPERTY
ACCESS
10' MIN. - 12' MAX.
GRAVEL OR PAVED
SURFACE
AS REQUIRED.
NOTE: 15" CMY_ MIN
-- SHOULDER
FLOW LINE
SHOULDER
PAVEMENT
•
WELD COUNTY ROAD
STORM WATER DRAINAGE FLOW LINE
PLAN VIEW
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 92 of 140
CHAPTER 8 - Public Works
APPENDIX 8-B ROAD ACCESS SKETCHES
SKETCH -
AGGREGATE BASE COURSE
lZ COVER OR PER
MANUFACTURER RECOMMENDATIONS -
ACCESS ROAD
DOWN GRADIENT SLOPE FOR A
WD4TMUNI OW l0'
20' RADIUS
27.
ROAD
CROSS-SECTION
PRIVATE PROPERTY
OR SUBDIVISION
ACCESS
24' OR AS REQUIRED
GRAVEL OR PAVED
SURFACE
AS REQUIRED.
_- PAVEMENT
2%
NOTE: 15" CMP. MIN
I2" COVER MIN.
A
A
FLOW LINE
SHOULDER
SHOULDER
PAVEMENT
LOW LINE
ACCESS
#3
WELD COUNTY ROAD
STORM WATER DRAINAGE FLOW LINE.
PLAN VIEW
-A
NOTE: ADDITIONAL WIDENING OF COUNTY ROAD
TURNING LANES MAY BE REQUIRED.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 93 of 140
CHAPTER 8 - Public Works
APPENDIX 8-B ROAD ACCESS SKETCHES
ROAD ACCESS
SKETCH #4
AGGREGATE RASE COURSE
12- COVER OR PER
MANUFACTURER RECOMMENDATIONS.
•
•
NOTE: 15" CMP. MIN
DOWN GRADIENT SLOPE FOR A
MINIMUM Ol 10'
20' RADIUS
2%
ROAD
CROSS-SECTION
A -A
PRIVATE PROPERTY
ACCF.SS
10' MIN. - 12' MAX.
GRAVEL OR PAVED
SURFACE
AS REQUIRED
r'- PAVEMENT
N
2%
FLOW LINE
SHOULDER
SHOULDER
PAVEMENT
FLOW LINE
Alb
WELD COUNTY ROAD
-__3AIfL_A1n9a _.---___---
PLAN VLEW
— A
0
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:45 [EST]
Page 94 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
APPENDIX 8-C CATTLE GUARDS
Date:
Weld County Department of Public Works P.O. Box 758 Greeley, CO 80632 (970) 356 4000 EXT. 3750
WELD COUNTY CA
LE GUARD AGREEMEN
The request for permission to install a cattle guard, location described as follows:
Address or location of access:
Weld County Road No. Side of Road N, S, E or W
Condition of existing guard: Good Fair Poor
k there an existing cattle guard and access to the property? Yes No
Condition of existing guard: Good Fair Poor
is approved subject to the following condition -s, restrictions and agreements:
That you restore the disturbed portions of all of the road right of way and roadway to their original conditions,
:able granular
to be removed from all the rights of way when
material, such as crushed rock
work is completed; that all roadway signs taken down be replaced immediately, and that you chec< and maintain
b-ackfill of mage it may cause.
That all labor and material will be furnished by you at no expense to
the installation with proper wa-rn-ing signs and sig-nals, i.e., flare*, both day and night; that you assume full
s resulting frc
�t any change are made in these
ure that would necessitate the removal or relocation of this installation, you wi I so remove or
relocate at your own expense upon written request from Weld County.
by reason of
of any claims made by any person, firm or corporation by reason of the installation of said cattle guard and the
maintenance thereof.
We d County is not responsible for any c.a-rnages caused by the maintenance of the county roans die to
installations placed inside the county road right of way.
successors and assigns.
ctive agents, heirs, executors, a iministra-tors,
PUBLIC WORKS DEPARTMENT
)unty Code
Page 95 of 140
Created: 2022-02-24 12:36:46 [EST]
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
1111 H STREET, P.O. BOX 758
GREELEY, COLORADO 80632
WEBSITE: WWW.CO.WELD.CO.US
PHONE: (970) 304-6496
FAX: (970) 304-6497
CATTLE GUARD INSTALLATION/RELOCATION
REIMBURSEMENT AGREEMENT
Date:
By signing this document, you have agreed to reimburse Weld County Public Works for
materials to install a 16', 24', or 32' wide Cattle Guard. The Cattle Guard location is on CR
between CR/Hwy and CR/Hwy at tenths of a mile N, S, E, or W of CR/Hwy
Cattle Guard design shall be in accordance with Weld County specifications and details.
Installation will be done by a Weld County Public Works crew at the agreed location.
Payment is required prior to installation.
A price breakdown: Cattle Guard width Foot:Total $
Landowner(s):
please print
(signature
(please print) (signature
Landowner Address:
Landowner Phone:
Weld County Representative Title
** Sign one copy and send the signed copy with payment to Weld County Public Works at P.O. Box 758, Greeley,
Colorado, 80632
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:46 [EST]
Page 96 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
8' 5 12' LOAD RATING H2O-
PORTABLE CATTLE GUARD CONSTRUCTION DETAILS
12'
2' I 2' > I 2' ,`� 4 2' r l 2' , I 2'
4'
B' -
a
4'
3/I6
/
/ _
I
y16 DIA
NOLES FOR _
I/2" U BOLT
IN 4 LIFT
AREA
\ ` 1
o°
L
II
I II
1 _
/'
II II
I I I.
I I I
II I
II I
II I
II II II
11 I
II II II
II II II
II I
II I
II II II
II I
I.°1 I I 1%1
I I
II II II
II I
II II II
II II I I
II I
II I
3'
d 4
6'
3'
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-82-24 12 36 46 [EST]
Page 97 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
CATTLE GUARDS #1 (cont'd)
2 1/2'
21/2 5
TYPICAL Foe BASE
ALL. CONNECTIONS
A a C
BASE B
NOTE OPPOSITE HAND BOLTING PATTERN FOR
SECTION A 8 C RESPECTIVELY
I-6.
9-^
20 7
3a 01' HOLES
H ENO OF BEAM
CHANNEL LENGTH 9-4.
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 46 [EST]
Page 98 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
CATTLE GUARDS #2
A V4 a 2 STRAP
CONCRETE BASE
I I
I I I I I
i
..,
,....---
r
r
I
1
t ....-
24—OY
PLAN VIEW
CROSSBAR
CIO a 207 CHANNEL
W 8 : 17 STRINGER
Ir
7LI/2� C -C
—9
CROSSBAR
en�
1 II 7i1 IS LCS L\ II II cl II IV
STRINGER W 8 a IT, WI 4 1/2--F►-
4
SECTION A -A
�CONERETE BASE
NO 4 BARS WITH
2"COVER
1
1-8
NO 4 SI1JitRIP$ AT
18�CC WfCH
2. COVER
CATTLE GUARD
DESIGNED DON CARROLL
CHECKED DREW SCH FETING
APROlED WAYNE SMYTH
WELD COUNTY ENGINEERIN(
DATE MARCH 31, 1981
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 46 [EST]
Page 99 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
CATTLE GUARDS #2 (cont'd)
12' GATE MADE OF 2" PIPE
5/B DRILL -2 PER
SIDE TYPICAL
GATE SUPPORT R CONNECTIONS
Weld County, Colorado, Charter and County Code
(Supp No 761
Created 2022-02-24 12 36 46 [EST]
Page 100 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
CATTLE GUARDS #3
` CROSS BAR
TYPICAL WHERE
CROSSBAR OR STRAPS
OR STRINGERS CONTACT
16
3,
�{I
I/4"x 2 STRAP
i0
2
STRINGER
-7 95WN
"1----
5/8
--CENTER
STRINGER SPACING DETAIL
SUPER- STRUCTURE
GENERAL NOTES
SUPER STRUCTURE TO BE SUPPLIED IN TWO SEPERATE 12=0 we UMTS ALL CONCRETE REINFORCING
BARS TO BE CONTINUOUS NO SPLICING OR LAPPING IS ALLOWED
ALL BOLTED CONNECTIONS ARE TO BE DOUBLE NUTTED ALL ANCHOR BOLTS, NUTS, WASHERS AND
CLIPS ARE 70 BE GALVANIZED
MATERIALS SHALL MEET THE STATE DEPARTMENT OF HIGHWAYS, DIVISION OF HIGHWAYS, STATE OF COLORADO,
STANDARD SPECIFICATIONS FOR ROAD AND BRIDGE CONSTRUCTION, 1991 OF THE FOLLOWING SECTIONS
SEC 509 03 STRUCTURAL CARBON STEEL (ASTM A36)
SEC 601 02 CONCRETE 15LA55 Al
SEC T09 01 REINFORCING STEEL (GRADE 40)
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-B2-24 12 36 46 LEST]
Page 101 of 140
CHAPTER 8 - Public Works
APPENDIX 8-C CATTLE GUARDS
CATTLE GUARDS #4
ANCHOR DETAI L
r 4 I'
1-4
3/8 PLATE —y
I/16. DIA �
HOLE )
ANCHOR CLIP DETAIL
N
3/13 PLATE �...
4 HOLES
O O O O
2.
3..
2"
14
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 46 [EST]
Page 102 of 140
CHAPTER 8 - Public Works
APPENDIX 8-D DUST CONTROLS AND SEASONAL ADJUSTMENT FACTOR
1. Potable water or natural ground water
3. Calcium chloride
The seasonal adjustment factor to be used in a tr
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2021-02-24 12:36:46 [EST]
Page 103 of 140
CHAPTER 8 - Public Works
APPENDIX 8-D DUST CONTROLS AND SEASONAL ADJUSTMENT FACTOR
33
34
35
36
September
37
0.8 0.9
.3
39
40
October
44
42
0.8- 1.0
43
44
November
45
46
4-7
IA
48
49
December
50
51
1.2
52
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:46 [EST]
Page 104 of 140
CHAPTER 8 - Public Works
APPENDIX 8-E Weld County MS4 Area
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:46 [EST]
Page 105 of 140
CHAPTER 8 - Public Works
APPENDIX 8-E Weld County MS4 Area
Legend
Urbanized Area (2010 Census
Weld County MS4 Permit Aren
Incorporated Municipalities
L I COOT Right of Way
r-1 State R Federal I ands
(Weld County Code Ordinance 2019 05}
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:46 [EST]
Page 106 of 140
CHAPTER 8 - Public Works
APPENDICES 8 -F -8-J. RESERVED
APPENDICES 8-F 8-J. RESERVED5
'Editor's note(s)—Ord. No. 2019-05, adopted June 17, 2019, repealed Appendices 8 -F -8-J, which pertained to
Evans/LaSalle EPA Urban Area Stormwater Phase II; Greeley EPA Urban Area Stormwater Phase II; Erie
Service Area Stormwater Utility Fees; Evans/LaSalle Service Area Stormwater Utility Fees; Greeley Service
Area Stormwater Utility Fees and derived from Weld County Code Ordinance 2003-2; Weld County Code
Ordinance 2009-5.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 107 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
APPENDIX 8-K--
NOp�"�l�F�}�N GOL�01�.P1�0
SUMMARY
I��GrIOf�L� L, GOMMC_I
May 2001
VI. TRANSPORTATION ELEMENT
DNire-re.,e
Noah Fran Range, particularly a ong t ie 1 25 Corridor, transportation is an
al Corridor Plan. The purpose of this element is to identify how much growth
is anticipate& in the Corridor anc wiat types of regiona transportati ecessary to
accommodate this anticipated growth.
To that end, anticipated deve
mined and a
alternatives were evaluated, leading to the development of a preferred long range I 25 Corridor Transportation
Concept Plan.
number of improvements that included the implementation of a commuter rail system. The system would be
ocatec a ong tie I 25 Corricor from Denver to Love anc, wit i an eventua continuation to cowntown Fort Col ins
service to provide connections to the commuter rail line.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 108 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
TAFS recommendations, majo
occur. Wi
growth ai
iodate future traffic, the
arterials and interchanges which serve as access to the freeway were impacted even more so with the eight lane
freeway. This was due to two factors: 1) The lack of alternative north south roadways shifted most of the north
south traffic in the Corridor, both regional and local, to 125 —compounding congestion, and 2) The lack of
reduced their performance, despite an improvement in 1 25's performance. The 125 widening alternatives were
also problematic in that the ability to both widen the freeway and implement the TAFS recommendation for
commuter rail was not possible within the 125 right of way.
As a result of analysis, input from the technical team, policy committee, and public, it was determined that the
and to enhance the mobility potential of the Corridor and its supporting regional transportation infrastructure.
The transportation concept plan recommended for the Corridor embraces the findings of the North Front Range
for commuter rail. The transportation concept plan is supportive of
the development of interconnected regional and local transit, bicycle connections, and pedestrian oriented activity
centers as essential first steps toward addressing the emerging congestion and mobility issues of the Corridor.
The resulting plan proposes a system of increased regional and feeder bus service, a commuter rail system, and
two north south arterials, one cast of k25 and one west of 125 to accommodate future growth in the North Front
Range and the 125 Corridor
on describe the process and analy
TRANSPORTATION PLANNING PROCESS
As mentioned previously, the North Front Range Transportation Alternatives Feasibility Study (TAFS) evaluated
future trave remand requirements a ong tie 125 Corridor between Denver ano Fort Col . Tie stucy
n
s
and feeder bus service to provide connections to the commuter rail line. These recommendations have been
f the overall
plan
The 125 Regional Corridor Transportation Plan is bash in art on a long range transportation planning model that
Fort Collins, Loveland, and Greeley; the towns of Windsor, Bert
Weld counties.
such as the Crossroads Subaru Transportation Study.
RUTURE DEVELO
MENTW
w
N
E
25 CORR
DOR
Range including the cities of
iouc, anc. Johnstown; and portions of Larirner and
ransportation Plan was ncluded. The
on planning efforts,
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 109 of 140
i
CHAPTER 8 - Public Works
APPENDIX 8-K
To ie p eva uate t ie effec , current anc future ceve-opment is
typica y measurec by numbers of lousing units, retai jobs, and non retai jobs for the purposes of transportation
modeling. As resicentia cove opment occurs, resicents of t -iese comes travel to p aces of shopping, work,
services, schools, and recreation. Retail and non retail jobs are indicators of economic development, and have the
As can be seen on tie exiibit at Figure 3, in 1998 tiere were approximate y 17,300 ewe ing units, 4,500 retai jobs
and 23,500 non retail jobs within the two mile wide i 25 Corridor between Fort Collins and Berthoud. This exhibit
IN kw Stays lookipster Neal
4�.7f� Errr�i� noose i* C V A 0014 ii
al.Xli %WAS
SW t t t "-p ! E . ) JMXtbS t $
LED !vitaie iti.1t. 'Mr1'is}firi' 1 j 'Psalm b .�Ilwhliiti!all)
zr r•.. .s .�.w> y ..... lii.... �.i w ... ,....
14 •
i
* ;may ,, 'kr
I. %
As part of the region's long ran
Range estimates hov
Nith some activity along US 34 west of 1 25.
bs are expected within their community for the next 20 to 25
gure 3. As can be seen, cwel
in
g
Significant growt i along the Corridor was a so
expected for retail jobs, which were estimated t-o+ncrea-se from 4,500 to 13,000, or 188 percent, and nonretail
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 110 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
anticipated along the US 34 east of 125. It is imoortant to note tiat as recently as 1998, little growth was projected
east of 125 in Windsor, Berthoud, and Johnstown.
proposals and approved development plans were
collected in the summer of 2000. In the Loveland area, recently updated 2020 projections were used. In the
ans and current zoning were used to estimate long term
development potential along the Corridor. Although there is no specific date defined as to when these
arc currently anticipated to increase from 17,300 to 56,500, a projected Corridor growth of 227 percent. Retail
:o increase by 355 percent, from 4,500 to 20,500. Nonretail jobs are anticipated to incr ase
from 23,500 to 95,600, for a total increase of 307 percent.
4t is important to note that these estimates, shown on Figure 3 as "Anticipated Projection," do not represent
official projections as adopted by the MPO. However, it was determined that these estimates of anticipated
development were an i I I rposes, because t ley ref ect actua- approvec
activity in the Corridor than the 2020 projections completed in 1998.
dwelling units and jobs within the Corridor
proposed and approved. As would be expected, the magnitude of anticipated development within the 125
Corridor will significantly impact traffic flow and congestion along the 125 Corridor. This impact is magnified by the
fact that few roadway improvements are planned i-n the 125 Corridor, as discussed in the next section.
NO
el
;RON
RANGE REG
OVAL TRANSPORTAT
ON
a
LAN
M DROVEMENTS
e, wiici induces tie 125
Corridor. A summary of the improvements proposed by the North Front Range 2020 Regional Transportation Plan
for the 4 25 Corridor is as follows:
• Rail stops in Johnstown and Loveland
• Increased feeder bus service
• Prospect Road: Widen to four lanes west of 125
• Timberline Road: Widen to six lanes from Vine to Harmony and four lanes south of Harmony
• Vine Drive: Widen to 4 lanes west of 1 25
• Harmony Road: Widen to 6 lanes west of l 25
• SH 402: Widen to 4 lanes west of 125
• US 34: Widen to 6 lanes west of 125
• CR 7/Rocky Mountain Avenue: Construction of 4 lanes
t icre is no planner widening of 125 within the study area. Second, tiere are virtually no transportation
improvements planned for the i 25 Corridor east of 125, i-n spite of the fact that significant growth is bath
occurring and anticipated. Third, there are no north south proposed alternatives to 125, other than the proposed
future commuter rail, which will primarily serve long distance home to work trips. Virtually all automobile and
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 111 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
interchanges.
RANSPORTAT
�rridor—both long and sl
ON ALTERNAT
rpi
3.„, .
V
Figure 4: Model Performance
=S DEVELO)MEN
AND ANA
ov�•t�'r�r�e.�t
YS
S
vel through ono of the
In order to address the magnitude of the problem, n-umero-us alternatives were considered. A total of 27 traffic
model runs were conducted to evaluate the tra
ortation infrastructure improvements. -
in Figure 4.6
6 The figures presented on the following exhibit caritai-n two sets of information, the amount of daily traffic and
projected performance. The daily traffic volume k depicted by how wide the line is drawn. The wider the
�e system. The color of the
engineering mcsureme
exit that serves Berthoud currently operates at LOS C cod-i-tions, and LOS B north of Harmony Road. The
s of LOS A, B, and C; yellow at LOS
orange at LOS E; anc reG representing congested conditions or LOS F.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 112 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
The first alternative represents exist.
"North Front Range Regional Transportation Plan Improvements," combined with the development levels
projected in 2020, as identified in Figure 4, "2020 Projection with Committed Network." These development levels
were forecast in 1998, before much of the current growth cycle had occurred.
tion improvements but
comoinec wit-) ceve ooment eve s icentifiec in F.
As can be seen, the current anticipated development obtaine ictions along the Corridor
indicates LOS F congestion and likely gridlock —all along 125 from Berthoud to Fort Collins. Furthermore, the
will result in failing levels of service along the frontage
The third scenario represents the introduction of a system of local roadways both east and west of the Interstate
Highway, to serve local and mid distance trips within the Corridor. The performance of this alternative is shown in
Figure 4, "Anticipated Development with Proposed Network," and is discussed in greater detail below under Local
Roadway Alternative.
As noted previously, a large number of alternatives were evaluated and tested. One alternative evaluated was the
widening of 125 from its current four lane configuration to six or eight lanes. Based on this analysis, it was
determined that the six lane option was not adequate to accommodate future demand. The eigh: lane freeway
t
traffic. The widening alternative was also problematic because the i 25 Corridor has insufficient right of way to
accommodate both widening and tie proposed 125 TAFS recommender improvements for Commuter Rail.
LOCAL ROADWAY ALTERNATIVE
of development planned to occur in the Corridor. One of the primary observations determined from this phase of
ble to serve proposed
development, other than a system of county roads that are discontinuous. Therefore, it was determined that the
primary issues that this pl he following:
What system of local roadway
modate future demand, and
• Can transit, rail, and non engineering improvements fix the problem?
To help evaluate these issues, a north south four lane road located east of the interstate was tested -as an
:s of the first alternative concluded that although traffic would
utilize this north south facility, a four lane roadway was insufficient i-n
point where acceptable levels of service would be experienced. This scenario also indicated that even with an
A follow up alternative examined a six lane arterial, also east of 125. From this alternative, it was determined that
Corridor; however, the size of a six lane arterial raises other issues that need to be addressed. Major concerns
ntion
whic
I
previously, a separate tran
las exami-ned in greater detai
Subarea.
rtation stucy
rt
transportation improvennts needed within t
Corridor six Ian 3s were required
t and resulting traffic,
evard Subarea. As
e frame of this stucy,
le Crossroads Boulevard
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 113 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
The Crossroads Study proposed a four lane County Road S from US 34 to SH 392 with a-dd4tional north south
and it was found to meet the transportation needs within this portion of the Corridor.
It s -ou c be emp-asizec tiat many of tie recommences roacway improvements are contingent upon tie
anticipatec growti in tie Corridor. Most roacway improvements wi not be bui t to maximum capacity in tie next
few years but will be p-hased ir} as development occurs over time. For instance, an existing 2 lane county road that
is recommences to become a 6 ane faci ity wi ire y be u agradec to a 4 ane faci ity in tie interim anc wi on y
be expanded if anc wien tie intensity of acjacent ceve opment requires it. It is critica for communities to be ab e
to icentify the potentia widti of these faci ities before they are neecec. This type of ong range p anning a ows
flict with existing and future
land uses.
OT
ER
SSUES ASSOC
ATED W
-
SA
TE
NAT
VE
t needed to be addressed.
These issues included the alignment for this north south roadway; the need for other connecting improvements
anc interc -ianges necessary to actress anticipated growti; ano tie potentia neec for a norti souti roacway
e north south roadway needed to be
continuous, and how far from 1 25 could this roadway be located yet still be effective.
ch of the participating communities to
arterial. Based on
al too far east resulted in a
mar -sec recuction in its attractiveness as an a ternative to 1 25. Tie neec for other connecting improvements, as
ased in the preferred concept
plan described in the section that follows.
PROPOSED
-25 CORK
DO
CONCEPTUA
RANSPO
TAT
ON
7
LAN
The proposed 1 25 Corridor Conceptual Transportation Plan is presented in Figure 5 and is described below.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 114 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
The recommended arterial improvements for the Corridor include both north/south arterials to serve
development on either side of
improvements were basec an current juriscictiona Master Street P ans.
A ong tie west site of 125, tie norti souti arteria begins at tie nortierly end of the study area as
Timberline Road, which extends as a six lane arterial to Harmony where it changes to a four ane arterial
south of Harmony. From this point, it extends south to County Road 32. Because Boyd Lake is located south
of County Road 32 and does not permi
that the north south arterial be d+rocaed to the south-east alo
the alignment of the Union Pacific Railroad,
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 115 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
until its intersection with County Road 9. This connection is consistent with the Crossroads Boulevard
Subarea Improvement Plans and the Loveland Transportation Plan. This north west to south east diagonal
roadway has bee
acditiona east west crossing of 125 between tie US -34 anc Crossroacs Interciange.
Continuing souti, County Roac 9 (Boyd La<e Avenue) is proposec to be a four ane arteria unti its
intersection with SH 402. South of Loveland, the north south arterial is proposed to occur along the existing
CR7. In review of the potential connections between CR9 to CR7, the recommendation was to utilize CR16 in
order to not impact east west traffic along SH402 or SH 60. As true with any of the Recommended Roadway
Networ< improvements, refinec sma I arcs studies might suggest mocifications to tie precise a ignments
and other recommendations might be made provided the north south connections are made.
Tie general alignment for a norti souti arteria cast of 125 wou c be a ong existing CR5. Tiis arterial
improvement would begin at SH 14 anc extend to tie souti to norti of tie Town of Timnat i. To avoic
im-pacts to Tin -math, the north souti arteria wou c bypass tie town to tie east anc then reconnect wit)
�auld jog slightly to the east
where it intersects with US 34 and continue to the southeast and connect with CR 3. The north south arterial
wou d proceec a ong CR 3 til between CR 16 and SH 60, where it would s -iift to tie west anc continue to
south of SH 56.
Weld County, Colorado, Charter and County Code
(Su pp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 116 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
nal.and hawk Network
..r tan...krr td
�•• Meg Iona Trait
41 IF * fl transit
'Ise fits le
im cOS *aA'San
Pesky Ss nson
East/West Arterials
In addition to the north south arterials east and west of 125, east and west arterials would be nec:ssary to
d 125. T-ree of the east west arterials are
lvd. (US 34). The majority of
include Mountain Vista Dri-v-e, Vi-ne Drive, Prospect Road, Cro-ssrnads Boulevard, SH 402, and SH 56.
Interchange Improvements
The Plan also calls for major improvements to the intc
fling interchanges will eventually need to be replaced or
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 117 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
improved -in order to accommodate anticipated
evels of traffic. Some improvements, such as for the
ve conceptual improvements being
interchanges have not been identified.
facilities. The recommendations are presented in Figure 6. A key component of the transit element is the planned
commuter rail service b
Alternatives Feasibility Study.
e 125 Corridor, connecting
Ito the Corridor from dcw-eloped ar as located to the east and west. On street
tors that are constructed within the 125
Corridor. As t ,
connections between major population and retail/employment areas. An important part of these connections will
I trails identified in the vari
Corridor. Additional connectivity will be provide
between future transit facilities and user destinations within activity centers in the Corridor.
If
Deve
opment with Proposed Network." It represents the existing and
:h the additional
roadway elements included in the proposed 1 25 Corridor Transportation P an, for ceve opmer}t eve s icentifiec in
Figure 3 as "AnticipateG Development." Although this plan will result in roadway congestion levels gr ater than
n areas, and represents a
dramatic improvement over the previously proposed regional network improvements. The improvements
in the Corridor as it grows and develops.
REGIONAL PARTNERSHIP AREAS
The 125 Corridor T
ort to address mobility
r proposed development, refine the trans-portation recommendations
ments, subsequent refinement and
implementation of improvements can best be met at a more localized leve-. The 125 Corridor has already
experienced a focused work effort between Lanim t z e- its ,Fort Collins, the City of Loveland, The
y for a study area
bounded generally by U.S. 34 on the south and County Roy
analysis, the development of funding, and prioritization of roadway improvements needed for this six square mile
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 118 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
area. This multi jurisdiction cooperative work effort has been highly successful, and can serve as a model for other
areas within the Corridor.
To this end, the 125 Corridor Study recommends the development of additional study areas, defined as Regional
Partnership Areas, as presented in Figure 7. In total, five areas have been identified, as follows:
This area consists of the northern portion of the 125 Corridor. It includes all portions within :he City of Fort
Collins and emerging development along the eastern side of 125. The Southern boundary along the west side
of 125 is the City of Loveland, whe ide of 125 is the Crossroads Study
Area (RPA2). RPM also includes the Town of -
The--RPA2 area is defined as the Crossroads Study Area anc examines current anc proposec cove oament
along the eastern side of I. 25 from north of SH 392 and to the south of US 34. This study area includes the
proposed La ds and portions of the
RPA 3 ----Loveland, Larimer County
The RPA3 area is within the City of Loveland along the west side of 125, and includes portions of Larimer
County.
The RPA4 area picks up the southern portion of the Corridor along the east side of 125, beginning at the
southern terminus of RPA2 (Crossroads Study Area). Because this segment is at the southern end of the
Corridor, coordination and interface with connecting roadways and development to the south of the 125
Study Area project will be important for continuity.
RPA 5 --Berthoud, Weld County
The RPAS area focuses on future development within the Town of Berthoud, east of 125 and connections to
the north and south.
Regiona Partners lip Areas work toget ler in a
manner similar to the Crossroads Study effort, conducting a detailed transportation evaluation, examining
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 119 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
r
PHASING OF IMPROVEMENTS
he
�e north south
precise alignments to mitigate potential environmental impacts where
appropriate mitigation will be necessary.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 120 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
NORT
SO UT
r
ARTER
AL AND
25
NTERC
A
ANGE DES
GNGU
DEL
NES
A major objective of the 125 Corridor plan is to set forth design guidelines for the north south arterials to maintain
efficient traffic flow. These Cosign guide -fines adcress such criteria as tie preservation of right of way, roadway
cross sections, and access standards. It is further recognized that the character and design of the north south
arterials should vary, d
centers, or in the more rural portions of the Corridor.
opment of north south arterials within
ctailed planning and traffic
these standards.
These recommended guidelines are not intended to replace other standards and requirements that commu-nities
�ment those standards, and to serve as a
guide for communities that do not yet have standards i-n place for roadways within the Corridor.
Criteria
Parameter
Activity Centers
Transition Areas
Rural Areas
Lower
Density
Higher Density
Agricultural;
Residential and
Vacant, Open
Residential;
Gommerceial-andSome
Business/Retail
Space
Business Centers
Right
of Way
Width
115'
115'
150'
Roadway
Width
(including
gal
8''
median}
Median
Mid
Block
Width
Adjacent
to
Left
Turn
Lane
Design
Speed
MPH
- ;
Speed
Limit
MPH
Travel
Lanes
ft of
Lanes
Width
_
Bike
Lanes
Designated
(Y or
N)
Width
81
81
10'
Parking
Lanes
Width
None
None
None
Sidewalk
Width
6'
6'
Optional
Parkway
Width
(min.)
10'
10'
10'
Street
Lighting
Yes
Yes
Ns
Signals
Signals
Per
Mile
i
0.5
Median
Openings
full
Openings
-
0.5
Per
Mile
_
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-32-24 12:36:47 [EST]
Page 121 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
3f Openings
Per
4
-
Me
Access
Locations
Per
6
-1
Mile
Curb
& Gutter
Yes
Yes
No
Left
Turn
Feet. Storage
43-5
500
Deceleration
Lane
Right
Turn
Feet
38
760
Deceleration
Lane
Acceleration
Feet
380
550
760
Lane
Sight
Distance
Feet
275
325
620
Along
Arterial
Entry Sight
Feet
520
659
Distance
N
ANGE DES
GN GU
DE
NES
constructed at a time when access was only necessary to service
rural and agriculture uses. As a result, as new development occurs along the Corridor, the current interchange
Thereforein accition to
the north/south arterial design guidelines, it is also important to establish minimum desi
interchanges within the study area so as to not restrict future development from encroaching adjacent to the
existing interchanges and preclude o
Based on minimum standards to accommodate back to -back left turn lanes across the interchange overpasses, it is
recommended that at a minimum 660 feet of right of way be preserved between the northbound and southbound
on and off ramps. It is further proposed that the minimum distance for an adjacent frontage road or signal not be
closer than 600 feet, and preferably 1,000 feet, from the adjacent interchange on and off ramps.
It should be noted that these minimum interchange spacing guidelines im-ply a standard diamond style
interchange, similar to the recently completed 1 25/Harmony interchange. In certain locations, other interchange
FUNDING
eeds that exceed
both local and regio
n the Corridor will likely be funded through
for transportation faci
ities s
lou
c be f u nc. eci by t
�e development activities, rather than by local residents.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 122 of 140
CHAPTER 8 - Public Works
APPENDIX 8-K
However, the 125 Corri - —I - --- ---- - -�s- ---------- ___-----______-- f----s----------------------------ure, not all of which
are attributable to development within the Corridor. Many of the improvements that are needed in the Corridor
communities as well as the region as a wio e anc, tiat cove opment in the Corridor can on y be e<pected to be
part of the funding solution.
As part of the planning process, sketch plan level cost estimates were developed for the arterial improvements
e Corridor. These arterial
improvement cost estimates focused on north south arterial improvements and east west arterials serving 125,
which were not included in current jurisdictional transportation plans. These costs estimates do rot include local
or collector leve-improvements. The total arterial improvements cost estimate is approximately $125 million.
In addition to the arterial improvements, sketch plan level cost estimates were developed for interchange
improvements along the corridor. In total, eight interchanges were ioentifiec as requiring major reconstruction
rovements and interchange
ropriate approach for
improvements within the Corridor. It is recommended that each of the Regional Partnership Areas undertake a
ortation improvements within their
area. Some of the mechanisms t
following:
Transportation Impact Fees
These are fees i-mposed on new c
transportation improvements to benefit communities.
evelopment, dedicated to the purpose of
gent. Impact
ons within the Corridor. It
could be form
initial transportation infrastructure costs. This mechanism is typically used to create an incentive for new tax
d -to
The funding of regionaljurisdictions along 125, highway
interchanges or regional mass transit, is a bigger issue. Some of these regional improvements migit be funded
One such source includes the formation of a Rura
entity that has the power to collect revenues for transportation projects from sales and use taxes, a motor vehicle
registration fee or a Visitor Benefit al voter approval of affected
resicen:s ws : lin i _s boc near es bu : woulc serve as a promising -source of funding for regiona transportation
projects.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 123 of 140
CHAPTER 8 - Public Works
APPENDIX 8-L
APPENDIX 8-L
Weld County Department of Public Works
ROADSIDE MEMORIAL SIGN APPLICATION
r'481%17'''IS
Name of applicant or group requesting sign
r� rf
ig..,.
o
COLORADO
Address
City
State
Phone Number
Email Address
Zip Code
Date of Fatal Crash
Location of Accident and Sign Placement (describe as closely as possible to place
sign)
Victim's Name(s) (as they should appear on the sign)
Victim's Immediate Family's Approval Signature (by signing you agree to the terms
and conditions shown below)
Date Signed
Comments
Should this information change please contact Public Works to update our records at 970-304-6496
Terms and Conditions
The sign must be requested by the victim's family or other sponsor with the consent of the victim's family
Weld County shall provide install and maintain the sign for four years after the date of installation After the four
years the sign will be returned to the applicant at the address shown above No private installation or maintenance
is allowed
Signs will only be installed by Weld County on County -maintained rights -of -way Public Works shall install the
sign as close as possible to the location given in the application If that location conflicts with existing signs or
creates an unsafe condition the sign will be moved to where rt can be installed safely If the roadway is annexed by
a local mumcipality after installation the applicant tutu] be required to receive permission from that muntctpality foe
the sign to remain otherwise Weld County will remove the sign if requested by the annexing agency and return it
to the applicant
The applicant shall submit a fee as determined by the Board of Weld County Commissioners to help cover the sign's
cost, installation maintenance and removal by Weld County Please contact the Public Works Department for more
information of current fees Ina multiple -fatality crash the fee shall be split equally between those families who
want their family members' names on the sign Once removed, each separate family shall receive a sign to keep
Please mail form with payment to Weld County PW, PO Box 758, Greeley CO 80632
(Weld County Code Ordinance 2008-7)
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 124 of 140
CHAPTER 8 - Public Works
APPENDIX 8-M Memorial Signs
APPENDIX 8-M . emoriao Signs
30
450 LET1E S
-i ", _ ..
.25 LETTEF °S
(Weld County Code Ordinance 2008-7)
24°®
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 125 of 140
CHAPTER 8 - Public Works
APPENDIX 8-N TRANSPORTATION PLAN
APPENDIX 8-N TRANSPORTATI N PLAN
https //www weldgov com/departments/public_works/transportation_planning/2045_transportation_plan
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 126 of 140
CHAPTER 8 - Public Works
APPENDIX 8-O FUNCTIONAL CLASSIFICATION MAP
APPENDIX 8-0 FUNCTIONAL CLASSIFICATION MAP
https //www weldgov com/departments/public_works/transportation_planning/2045_transportation_plan
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 127 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
The intent of the Right -of -Way Use Permit is to regulate and permit the use of Weld County's public right-of-
way by private companies, municipalities and/or special districts constructing and burying lines either crossing or
running parallel within Weld County right-of-way. Crossings are allowed for all lines. Parallel installations are
allowed for lines of "public utilities" that are defined in CRS 40-1-103 and are "domestic or foreign electric light
power, gas, or pipeline companies" holding current Certificates of Public Convenience and Necessity issued by the
Colorado Public Utilities Commission; for water lines of municipalities, water districts, and water and sewer
districts; for transmission lines or pipelines used solely for agricultural purposes; for fresh water above -ground
transfer pipelines; for lines in non -maintained right-of-way if approved by Weld County based upon locational
factors, such as, surrounding population density, topography, or if the right-of-way provides access to a recorded
exemption lot, and with Permittee's agreement to move the line at its sole expense if Weld County or an annexing
municipality intends to improve the right-of-way; or if authorized by the Board of County Commissioners in an
appeal of the denial of a Right -of -Way Permit application, pursuant to Weld County Code Section 8-13-110. Public
right-of-way subject to regulation by the Right -of -Way Use Permit includes Weld County's maintained and non -
maintained, and all public drainage easements. A Right -of -Way Use Permit grants the Permittee and its
Contractors permission to occupy designated County right-of-way. The Permit authorizes excavation, surveying,
and/or construction of facilities within the County right-of-way and provides for their subsequent restoration upon
completion of the Project. The Permit is issued solely for the Permittee's and its Contractor's construction of the
Project. Permittee is prohibited from changing the use of the Project in any way without first obtaining a new
permit.
SUBMITTAL REQUIREMENTS
1. Complete application. Permittee must submit a complete Right -of -Way Use Application and include
required submittals for review and consideration of its Project. If the Project is approved, a Right -of -
Way Use Permit will be issued to the Permittee. It is the Permittee's responsibility to inform its
Contractor of all Permit requirements, Provisions, and attached Special Provisions.
2. Drawing, plan set, and map. A drawing, plan set and map are required to be submitted with the
Application. Detailed plan(s), sketch, and/or map(s) showing the work location and roadway, edge of
roadway, County ROW lines and width, at least one crossroad, and a legend. It is preferred, that
drawings be 11x17 or capable of being printed out in 11 x 17. All underground installations must
include a cross section typicaldrawing showing depth of line being installed per County requirements
based on the lowest point of the County ROW and show the County ROW width Engineer stamped plan
and profile drawings are required for underground installations running parallel within a roadway:
Drawings at intersections must be in plan and profile and shall be at a scale of 1:100 or as determined
by the Department of Public Works.
3. Traffic Control Plan. A Traffic Control Plan (TCP) or Method of Handling Traffic (MHT) must be
submitted and approved prior to Permittee's commencement of work. Permittee shall provide all
necessary traffic control in accordance with the Manual on Uniform Traffic Control Devices (MUTCD) in
drawing form; narratives will not be accepted.
(a) Flaggers shall be required at any locations where there is encroachment into a travelling lane.
(b) Full road closure requests must be prepared by and signed by a Traffic Control Supervisor (TCS).
(c) Full road closures exceeding three (3) days shall require approval of the Board of County
Commissioners.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 128 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
4 Insurance Permittee and/or its Contractor shall secure and maintain insurance policies and/or provide
proof of adequate self-insurance that will protect itself, its sub -contractors, members of the public who
use the right-of-way associated with the Project, and Weld County, Colorado, from claims for bodily
injury, death, or property damage which may arise from the construction of the Project, or caused by
the facilities which are constructed as permitted herein The Board of County Commissioners of Weld
County, Colorado, its officers, and employees must be named as an "Additional Named Insureds" in all
liability insurance policies secured by the Permittee and/or its Contractor The following insurance
policies and amounts are required Certificates of insurance evidencing such policies shall be delivered
to the Weld County Department of Public Works
(a) Statutory Worker's Compensation
(b) Contractor's public liability and property damage in the following sums
Bodily Injury
Each person I $1,000,000
Each accident $1,000,000
Property Damage
Each accident I $1,000,000
Aggregate $2,000,000
(c) Automobile public liability and property damage in the following sums
Bodily Injury
Each person I $1,000,000
Each accident $1,000,000
Property Damage
Each accident I $1,000,000
5 Bonding and Surety If determined necessary by Weld County's Department of Public Works, Permittee
shall provide a surety bond or other security for the total amount required to restore the right-of-way
under which the Project is to be installed or constructed, based upon current Weld County Department
of Public Works contract prices for the performance of such work Said collateral shall remain in effect
for a period of two (2) years after inspection of completed construction by Weld County Department of
Public Works Whether or not covered by a bond, Permittee shall reimburse Weld County for all
expenses incurred by it as the result of, or related to, the failure by Permittee or its Contractor to
perform all installation, construction, maintenance or other work pursuant to this Permit in a
workmanlike manner
6 Geotechnical Submittals The Weld County Department of Public Works reserves the right to request
from Permittee geotechnical submittals if deemed necessary
The grant of this Permit is conditioned upon Permittee's and its Contractor's compliance with the General
Provisions, Construction Provisions, Pipeline Provisions (if applicable), and General Matters set forth below By
accepting this Permit, Permittee and its Contractor agree to comply with the terms and conditions set forth herein
1 Permit Required
(a)
GENERAL PROVISIONS
Commencement of construction prior to receiving an approved Permit will result in applicable
penalties (see emergency repair section for exclusions listed as item number 12)
(b) Contractor must have a copy of this Permit on site during construction of the Project
(c) This Permit requires commencement of construction within three (3) months from date issued
unless otherwise stated The Permittee may apply for an extension if work is not completed
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 129 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
before the expiration of three (3) months. All applicable fees must be paid before extension will
be issued.
2. Inspection. Inspection of work performed in Weld County right-of-way is required. The Weld County
Department of Public Works must be notified 48 hours prior to commencing all work within Weld
County right-of-way. Final inspections are required. Weld County shall have the right to order
Permittee or its Contractor to stop work anytime Weld County believes that a violation of this Permit
has occurred or if there is a danger to the safety of the public if the work continues.
3 Additional Permits. Permittee shall be responsible for obtaining all other state, federal, or local permits
which may be required of Permittee and/or its Contractor to install and/or maintain its Project.
Permittee shall provide evidence of such other permits upon request by the Weld County Department
of Public Works.
4 Determination of Placement. Weld County reserves the right to determine the specific placement of
the Project or lines within its right-of-way.
5. Suspension of Work. Weld County's Department of Public Works shall have the authority to suspend
work, wholly or in part, because of the failure of Permittee to properly execute the work in accordance
with this Permit. Notwithstanding the issuance of this Permit, Weld County reserves the right to make
o r to require Permittee to make any changes, additions, repairs or required relocation of any facilities
within the dedicated right-of-way at any time.
6. Setback Requirements. By accepting this Permit, Permittee hereby waives its right to require industry
setback requirements which it might otherwise require from other utilities which may be placed in
Weld County's right-of-way and relinquishes its authority over the placement of all other electric,
power, gas, communications or other conduits, pipelines, appurtenances, or irrigation structures which
Weld County may allow to be placed in its Right-of-way. Weld County must approve location prior to
construction.
7 Compliance with Utility Notification Requirements. Permittee and/or its Contractor shall comply with
all applicable requirements of C.R.S. §§ 9-1.5-101, et seq., and be responsible for locating all existing
u tilities and registering all new lines with 811. Contact the Utility Notification Center of Colorado at 811
or 1-800-922-1987 at least two days in advance of digging. Markers and flags are valid for 30 days.
Permittee must remove all utility locates such as flags and marker pins from the right-of-way once the
construction is complete. Any subsurface utility engineering notification sent to the Colorado
Notification Association shall also be sent to the Weld County Department of Public Works.
8. No Damage to Other Projects. No culverts, irrigation structures, drain lines, utility lines, or any other
Projects or facilities within the right-of-way are to be cut or damaged. In the event Permittee or its
Contractor damages an existing facility, Permittee shall first notify the owner and either immediately
repair and replace the damaged facility or pay the owner to repair and replace the same in accordance
with the desires of the owner.
9 Emergencies. Permittee shall report all emergency repairs to Weld County Public Works immediately
u pon being advised that an emergency exists. During such repairs, Permittee shall utilize proper traffic
control measures. Permittee shall apply for a Right -of -Way Use Permit and make the required repairs
as soon as practicable after the Weld County Department of Public Works is notified of the emergency
situation and the need for such repairs. In no event shall such repairs be completed later than 24 hours
after receiving such notification, unless adverse weather conditions prohibit the repair process.
10. Changes Made to the Right-of-way - Permittee's Financial Responsibility. In the event changes are
made by Weld County to the right-of-way or appurtenances within the right-of-way that would
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 130 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
n ecessitate removal or relocation of the Project, Permittee shall do so promptly at its own expense
u pon the request of Weld County.
11. Permittee Responsible for All Project Related Expenses. The construction, operation, maintenance and
repair of the Project constructed by Permittee, and all other improvements described in this Permit,
shall be at its own expense and without the aid or use of Weld County funds.
12. Permittee Solely Responsible. Permittee or its successors and assigns, remains solely responsible for all
matters pertaining to the Project and all costs associated with or pertaining to the Project. These
responsibilities include, but are not limited to, the following: repair and maintenance of the physical
components of the Project; removal of the physical components of the Project upon retirement of the
u se or following the request of Weld County to remove the Project; cooperation with Weld County and
other Permittees whose projects are placed in Weld County's right-of-way.
13. Successors and Assigns of Permittee. It is mutually understood and agreed that this Permit and all the
terms and conditions hereof shall extend to and be binding upon the Permittee and its successors and
assigns.
CONSTRUCTION PROVISIONS
1 Road Crossings. All underground installations crossing maintained or non -maintained Weld County
roadways and 40 -t -of ways road rights -of -way shall be by directional bore unless otherwise approved
by Weld County Public Works.
2. Parallel Installations. Parallel installations within the untraveled portion of Weld County road right-of-
way may be performed by bore, trenching, plowing, drilling or excavation. Parallel installation methods
within the traveled portion shall be determined by the Department of Public Works.
3. Bridge Structures.
(a) No lines shall be attached or otherwise placed along or upon any Bridge structure or wing walls.
(b) No continuous line shall be installed crossing under a bridge structure.
(c) Underground projects installed parallel to a bridge structure must maintain a minimum clearance
of five feet (5') from all wing walls and pilings.
4. Minimum Cover for Countyright of way Road Right -of -Way installationslnstallations. A I depth
requirements are minimums and are subject to approval or modification by the Department of Public
Works based on engineering and safety standards and existing utilities in the road right-of-way. In no
event shall any facilities be installed in Weld County road right-of-way at depth less than four feet (4')
from top of line measured from the lowest point of the road right-of-way.
(a) Dry utilities shall be installed at a minimum depth of four feet (4') from top of line measured from
the lowest point of the road right-of-way (flowline).
(b) Wet utilities shall be installed at a minimum depth of six feet (6') from top of line measured from
the lowest point of the road right-of-way (flowline).
(c) All types of oil and gas lines shall be installed at a minimum depth of ten feet (10') from top of
line measured from the lowest point of the road right-of-way (flowline). Concrete surfaces shall
be crossed at a minimum depth of fifteen feet (15') from top of line measured from the lowest
point of the road right-of-way (flowline).
(d) All line types crossing tenon -maintained road right-of-way shall be at a minimum depth of four
feet (4') from top of line measured from the lowest point of the road right-of-way (flowline).
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 131 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
(e) Culverts must have a minimum of twelve inches (12") of cover.
S. Daily Construction Requirements. At the end of each day during the installation and construction of the
Project, Permittee shall observe the following requirements:
(a) Working hours allowed under this Permit are from Sunrise to 1/2 hour prior to Sunset.
(b) All materials shall be removed a minimum of ten feet (10') from outside edge of the road
shoulder.
(c) All excavations upon the traveled portions of the road right-of-way shall be back -filled in
accordance with the compaction requirements set forth below unless otherwise approved by
Weld County.
(d) All traffic signs must be in place per the approved Traffic Control Plan or removed or covered if
not applicable to nightly activities.
6. Equipment Movement and Equipment Crossings.
(a) Movement of cleated or track equipment is restricted to the immediate work area. Equipment
shall be transported to a proper unloading area. No cleated or track equipment may work on or
move over any roadway surface without mats.
(b) Equipment crossings shall require a separate permit and must meet safety and sight distance
criteria for approval. Crossings are; in line with the Project and 7shall be built up level with the
road surface with a practicable anti -tracking material to prevent damage to the road surfaces and
shoulder areas. Crushed concrete is prohibited for use as a surface material. A minimum of a
twelve -inch (12") culvert shall be placed in ditch areas under tracking pad to maintain proper
drainage. Existing ditch and upstream and downstream culverts must be observed in determining
appropriate drainage culvert size.
7 Site Markers. Permittee shall mark the site of the construction of the Project, whether permanent or
temporary, with markers acceptable to Weld County Department of Public Works. Markers shall be
placed as far from edge of road as to not interfere with normal road maintenance.
8. Future Line Location. The installation of non-ferrous lines in the road right-of-way shall require a
suitable means to facilitate future line location such as, but not limited to, metallic warning tape
installed above the line and registration with 811.
9. Concrete Surfaces. There is a strict no cut policy on all concrete surfaces, which includes potholing. Any
damage or cutting of concrete surfaces will result in the Permittee being responsible for the cost of a
full replacement of concrete panel(s) by a Contractor approved by Weld County. Bore grout may be
required for underground crossings of concrete surfaces.
10. Asphalt Surfaces. Asphalt surfaces are not to be cut unless approved by the Weld County Department
of Public Works. If an asphalt surface cut is granted, the cut shall be repaired with a flowable fill
cement (refer to Section 11. Compaction Requirements, below) and hot bituminous pavement and/or
concrete placed at a thickness of existing plus one (+1).
11. Compaction Requirements.
(a) All compaction of backfills and road surfaces shall be compacted in accordance with the most
current versions of the Colorado Department of Transportation (CDOT) Standard Specifications
for Road and Bridge Construction and Field Materials Manual.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 132 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
(b) All backfills located within an existing asphalt surface or under the asphalt not cu -rently in place
but will be as part of a new road construction, must be compacted using flow -fill cement in the
upper three feet (3') of backfill.
(c) If any wet or non-compactable materials are produced from excavations, they sh ill be
completely removed from the road right-of-way and replaced with compactable materials. the
The road right-of-way shall then be returned to the original grades and cross sections. Weld
County Department of Public Works shall have the authority to determine what naterials shall
be discarded and what materials shall be acceptable as replacement.
(d) On gravel roads where excavation materials are stacked on the road surface, road base of -44- 1.5
1 -12 -inch surface gravel as specified in Chapter 7 9 of the Weld County Engineerir g and
Construction Criteria Manual ;Appendix 8-Q) specifications for surface gravel sha I be spread over
the entire road surface at a minimum depth of six inches (6") upon completion of the work.
Shoulders on paved roads or barrow ditches where excavation is done shall require a minimum
of four inches (4") of 3/ -inch Class 6-6 aggregate road base material. Recycled Concrete will not be
substituted for Class 6 aggregate road base. These amounts are minimums and do not supersede
any requirements within the Permit.
e) On gravel roads where excavation is done within the roadway, backfilling lifts greeter than eight
inches (8"), but not exceeding twelve inches (12"), shall be permitted providing that Permittee
has suitable equipment to properly compact the depth of lift placed. Weld County Public Works
shall determine if Permittee's equipment and the depth of backfill lift is appropriate. Ninety-five
percent (95%) of a standard proctor shall be required at any trench depth or in replacement of
any materials within the traveled portion of the road right-of-way. Eighty-five percent (85%) of a
standard proctor shall be required at any trench depth or in replacement of any naterials off the
traveled portions of the road right-of-way. Installations running parallel within a gravel roadway
will require a final placement of a minimum of six inches (6") of surface gravel after all of the
Project has been placed and compaction test results are in compliance.
Potholes in gravel surfaces shall be filled completely with road base and compact 2d. Potholes in
asphalt shall be filled with a cement/grout to existing thickness plus 1 (+1) or fille 1 with a
compactable base material and the final placement a HMA or concrete material cf existing
thickness plus one (+1). Cold patching material is not an acceptable method of restoration.
12. Reseeding. Permittee shall reseed, with a seed mix approved by Weld County Department of Public
Works, all areas within the road right-of-way in which vegetation was removed or disturbed during the
installation of its Project.
13. Points of Access. Permittee shall install manholes and other points of access to underground lines
within the boundaries of the road right-of-way outside the normal wheel path of the roadway so that
they do not obstruct maintenance operations within the road right-of-way. Permittee stall, at its sole
expense, adjust access points, when requested to do so by Weld County.
14. Survey Monuments. Permittee or its Contractor shall preserve or replace all survey monuments or
benchmarks at each work site. If such monuments or benchmarks are destroyed, Permittee shall hire a
registered land surveyor to replace destroyed monuments or benchmarks. If Permittee chooses to
preserve such monuments or benchmarks, it shall also hire a registered land surveyor t complete such
preservation.
(
(f)
15. Permittee's Obligations Regarding Surveys.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 133 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
(a) All surveying performed within the boundaries of the road right-of-way shall be conducted with
proper safety equipment and advanced warning signs;
(b) Surveying permit holders can be issued an annual permit.
(c) Any excavation within the boundaries of the road right-of-way will be backfilled with the same
material or better than what was excavated.
(d) Weld County Department of Public Works offers free monument boxes and lids to Permittee to
establish, upgrade or perpetuate the location of an aliquot corner of any section on a paved road.
Permittee shall furnish the location of the section corners being preserved to the Department of
Public Works when obtaining monument boxes.
16 Permittee's Obligations Regarding the Completion of Project.
(a) Permittee shall place surface gravel, as specified in Chapter 7 of the Weld County Engineering
and Construction Criteria, on all surfaces where any damage has occurred to the road surface
from equipment, trenching, or storage of material. Weld County shall determine the damaged
areas, remedial work required, and timing of said work.
(b) Permittee shall complete road restoration including, but not limited to, clean-up (including utility
markers), repair of damaged facilities, trench compaction, and replacement of gravel shall be
kept within one (1) mile of new excavation.
(c) All disturbed portions of the road right-of-way or damaged road surfaces are to be returned to
their original condition prior to demobilizing. If the road right-of-way is not returned to original
conditions, Weld County may perform or contract such remedial work and Permittee shall pay for
all work or forfeit its surety bond in order to pay for all work done.
(d) Permittee shall own, maintain, operate and repair any line installed or constructed herein in
accordance with the regulations, conditions and terms of this permit. No lines installed within
County rights -of -way may be abandoned by the owner at any time. Although the lines may be
retired, they may not be abandoned and all responsibility for such lines remains with the owner.
The County does not recognize, nor accept, any lines designated by any other source as
abandoned, and the County will continue to expect such lines to be maintained or removed by
the Permittee.
17. Line Retirement. Retirement of lines in Weld County road right-of-way are still required to be located
as part of 811. If Weld County approves a line to be retired, the retirement of an existing line in the
road right-of-way shall be subject to conditions as determined by the Weld County Department of
Public Works based on the age, condition, material type, and size. Permittee shall cut, cap, and fill
Project(s}lines that are not required to be removed.
18. Line Abandonment. If Permittee desires to abandon a line from being located as part of 811
notification, Permittee shall completely remove the line from Weld County road right-of-way, unless
otherwise approved by Weld County.
19. Drainage Interference. Permittee shall not obstruct the natural free and clear passage of water along
the roadside ditch flow lines or other waterways. If surface drainage is to be affected, Permittee is
responsible for the proper disposition of the runoff.
PIPELINE PROVISIONS
1. Natural Gas/Crude Oil Pipelines.
(a) Road crossings for natural gas/crude oil pipelines must be by directional bore, only.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 134 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
(b) Above -ground appurtenances and/or equipment are not permissible for installation within the
County road right-of-way and must comply with setback requirements.
2. Permanent Fresh Water (Non -Potable) Pipelines.
(a) Road crossings for permanent fresh water (non -potable) pipelines must be by d rectional bore,
onl
Y
(b) Permanent fresh water (non -potable) pipelines must extend past future road right-of-way prior
to daylighting.
(c) Above ground appurtenances and/or equipment are not permissible for installation within the
County I ow- right-of-way and must comply with setback requirements.
(d) Weld County approval is required for any change of use or retirement of a permanent fresh
water (non -potable) pipeline.
3. Temporary Fresh --Wt Above -Ground Transfer Pipelines.
(a) Fresh water aPbove-ground transfer pipelines are allowed as a temporary use for a period of 6
months or less for both road crossings and parallel installations. See the limitations and
restrictions set forth below depending upon crossing methods.
(b) Fresh water aAbove-ground transfer pipelines may transfer fresh or recycled water and dairy
irrigation slurry, only.
(c) The source of water must be disclosed on the Right -of -Way Use Application and location maps.
(d) The use of tenon -maintained Weld County road right-of-way for temporary fresh water above-
ground transfer pipelines shall be negotiated with the landowner(s).
Existing driveway culverts may not be used for water transfers and permission from
ppe property owner must be provided for crossing private driveways or accesses.
All pipelines or lay flat pipes occupying the road right-of-way (running parallel tc, the roadway)
must be secured up out of the ditch flowlines and away from the road edges. They may not
interfere with normal road maintenance or impede drainage. All accesses and driveways shall be
accessible and cannot be blocked by lay flat lines. Trailer mounted pumps shall oe placed on
private property and must be maintained and re -fueled on private property.
Crossing methods for temporary fresh water above -ground transfer pipelines:
1) Plate/Manifold:
a. Applicable for untreated gravel roadways for a transfer duration of 10 days or
less.
2
b Must be covered with Class 6 road base' % "surface gravel with a minimum of
15 -foot road base tapers on each side. All forms of traffic must be able to safely
cross the plate/manifold.
c Traffic control signs required including a speed reduction to 15 mph for the
duration of the transfer.
d Permittee is required to maintain the crossing which includes 24 -hour snow
removal in winter.
Culvert Sleeve:
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 202-02-24 12:36:47 [EST]
Page 135 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
3
4
b.
Applicable for longer term transfers crossing untreated gravel roadways only.
Maximum culvert size is an 18" 18" outside diameter for a single line transfer
and 24" outside diameter Elliptical for a double line transfer unless approved by
the Weld County Department of Public Works.
c. Minimum of 18" of Glass 6 road base 1.5"_4 surface gravel cover on culvert.
d Compaction tests of road base is required after culvert is removed if flowable
fill is not used for final restoration of the roadway.
Existing Culverts:
a. Requests for use of existing County culverts (any culvert crossing under a
County maintained roadway or intersection) are subject to special review. Use
is for a maximum of 15 days.
b Existing culverts are not available for use from March through October.
c. Driveway/access culverts are not available for use.
d. If the culvert also serves for irrigation, written permission from the Irrigation or
Ditch Company may be required.
e Culvert must be cleared anytime drainage is impeded due to run-off or flooding
or a significant rain or flooding event is forecasted. Shut off valves should be
placed on each side of culvert to allow for disconnection and removal.
HDPE or PVC Pipe:
a. Applicable for longer term transfers where a paved, hard surface, or treated
gravel roadway must be crossed.
b Pipeline installation is required to be at a depth of 10 feet based on the lowest
point in the County ROW and ends must extend past future road right-of-way
before daylighting. Installation method by boring only.
c. Weld County approval is required for any change of use or retirement of the
pipeline.
Produced Raw Water Pipelines.
(a) No temporary above -ground transfers.
(b) Pipelines will only be considered for approval that are transferring to a State and County
approved injection or recycling facility.
(c) Casing is required for crossing under County roadways.
(d) Casing type may be determined by the Permittee or its Contractor.
(e) Casing maximum outside diameter is not to exceed 12".
(f) Casing ends must extend outside of the County road right-of-way.
(g) If Flex Steel Pipe or equivalent with a temperature rating of 180 degrees or higher is used, casing
requirement will be waived.
(h) Maximum size of the produced water pipeline is not to exceed 8" and not to exceed 10" outside
diameter 'OD .
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 136 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
Requests for larger diameter pipelines will require special review by the Weld County
Department of Public Works.
Location markers shall be green in color and must list "produced water" and an emergency
contact number.
GENERAL MATTERS
1. Terms.
(a) All references herein to "Right -of -Way" refer to a portion of land that is dedicated or granted to
and accepted by Weld County for transportation purposes, such as a paved or gravel roadway or
highway whether maintained or not unmaintained by Weld County. The term is used as both
singular and plural.
(b) All references herein to "Permittee" are to any persons and/or entities applying :or and being
issued this Right -of -Way Use Permit granting permission to construct their Project within Weld
County's right-of-way.
(c) All references here to "Lines" means all underground and overhead cable, telephone, electric,
power, wire, gas and irrigation lines, and/or appurtenances, structures or pipelines.
(d) All references herein to "Contractor" are to any persons or business entities reta ned by
Permittee to install the Project in Weld County right-of-way.
(e) All references herein to "Permit" refer to this Right -of -Way Use Permit, including all Permit
requirements, Provisions, and attached Special Provisions.
2 Weld County's Limited Interest in Right -of -Way. Weld County owns a limited interest in the right-of-
way and therefore, does not, by the issuance of this Permit, warrant its ownership of the right-of-way.
Permittee is responsible for determining the ownership of properties traversed by its lines, the location
of all property boundary lines, and the ownership of all right-of-way. Therefore, Permittee shall obtain
from the fee title owner(s) of the right-of-way or others having proprietary interests in the right-of-way
such authority or rights as Permittee may need, in addition to this Permit for Permittee's use of the
right-of-way. Permittee acknowledges and agrees that the authorization granted herei 1 by Weld
County is subject to Permittee's securing such authority or rights.
3. Rights Reserved by Weld County. Permittee acknowledges and agrees that the Right -of -Way which are
the subject of this Permit exist as public right-of-way for the primary benefit of the travelling public,
and that the rights granted in this Permit to the Permittee are subject to Weld County's rights and
obligations to preserve and maintain the right-of-way and the public's right to continue to travel safely
upon the right-of-way.
(a) Subject to the right granted herein to Permittee, Weld County reserves the rema ning use of the
Right -of -Way for existing and future construction, operation, maintenance, repai-, replacement
relocation and abandonment of its own use and facilities.
(b) Weld County reserves the right to revoke this Permit at any time if Permittee or i:s Contractor
fails to comply with the requirements of this Permit. Should this Permit be terminated for non-
compliance by Permittee or its Contractor, any lines or facilities installed prior to the termination
shall remain the responsibility of the Permittee and may be removed or maintained by Permittee
at the sole discretion of Weld County.
(c) This Permit is non-exclusive. Weld County reserves the right to allow other public and private
utilities and entities to utilize the subject right-of-way and may impose location requirements and
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 137 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
restrictions on Permittee in anticipation of requests by future public and private utilities and
entities to occupy the right-of-way.
(d) Weld County reserves the right to reconstruct, widen and/or maintain the right-of-way which are
the subject Permit. In the event this work requires Permittee to incur expenses to preserve, re-
locate or maintain its Project, Permittee shall do so upon notification from Weld County at its
sole cost.
4 Indemnification. Except for the negligence of Weld County, Permittee shall indemnify and save
harmless Weld County, its officers, employees, agents, successors and assigns from any damage or loss
sustained by them or any of them, which arises by reason of Permittee's negligence with respect to the
installation, upgrade and/or maintenance of the Project.
5 Hold Harmless. Permittee agrees to protect Weld County and save and hold Weld County harmless
from any and all third- party claims and damages which the installation and/or maintenance of
Permittee's Project and related facilities may directly or indirectly cause. Additionally, Permittee
releases Weld County from any and all claims and damages to property owned by Permittee resulting
from any act, either by or on the part of Weld County or by or on the part of any third -party.
6 No Assignment. Permittee shall not assign any or all of its rights under this Permit without first
obtaining written consent to such assignment from Weld County, which consent shall not be
unreasonably withheld. However, in the event Permittee contracts with a third -party Contractor to
perform the work associated with the installation of the Project, Permittee remains solely responsible
for Contractor's compliance with the terms and conditions of this Permit.
7 Entire Permit Agreement. The parties hereby agree that neither has made or authorized any
agreement with respect to the subject matter of this instrument other than expressly set forth herein,
and no oral representation, promise, or consideration different from the terms herein contained shall
be binding on either party hereto, or its agents or employees. This Permit embodies all agreements
between the parties hereto and there are no promises, terms, conditions, or obligations referring to
the subject matter whereof other than as contained herein.
8 Effect of Invalidity of Provision. If any term or provision of this Permit, or the application thereof to any
person or circumstances shall, to any extent, be held invalid or unenforceable, the remainder of this
Permit, or the application of such terms or provisions, to a person or circumstances other than those as
to which it is held invalid or unenforceable, shall not be affected, and every other term and provision of
this Permit shall be deemed valid and enforceable to the extent permitted by law.
9. No Waiver of Immunity. No term or condition of this Permit shall be construed or interpreted as a
waiver, express or implied, of any of the immunities, rights, benefits, protections or other provisions, of
the Colorado Governmental Immunity Act §§ 24-10-101 et seq., as applicable now or hereafter
amended.
10. No Third Party Beneficiary. It is expressly understood and agreed that the enforcement of the terms
and conditions of this Permit, and all rights of action relating to such enforcement, shall be strictly
reserved to Weld County and nothing in this Permit shall give or allow any claim or right of action
whatsoever by any other person not included in this Permit. It is mutually understood and agreed that
this Permit and all the terms and conditions hereof shall extend to and be binding upon the Permittee
and its successors and assigns.
SPECIAL PROVISIONS
This Permit may be subject to additional Special Provisions. Such Special Provisions are attached hereto.
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 138 of 140
CHAPTER 8 - Public Works
APPENDIX 8-P RIGHT-OF-WAY USE PERMIT
Permittee Signature
Printed name
Date
Weld County, Colorado, Charter and County Code
(Supp No 76)
Created 2022-02-24 12 36 47 [EST]
Page 139 of 140
CHAPTER 8 - Public Works
APPENDIX 8-Q WELD COUNTY ENGINEERING AND CONSTRUCTION CRITERIA
APPENDIX 8-Q WELD COUNTY ENGINEERING AND CONSTRUCTION CRITERIA
2020-weld-county-engineering-and-construction-criteria-final-version-2021-03-17.pdf
redassets/public/departments/public works/documents/evons folder/2020
onstruction criteria final version 2021 03 17.pdf
Weld County, Colorado, Charter and County Code
(Supp. No. 76)
Created: 2022-02-24 12:36:47 [EST]
Page 140 of 140
Cover PageAPPENDIX 8-Q WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
This page intentionally left blank
TABLE OF CONTENTS
Chapter 1 General Provisions 1
1.1 Title 1
1.2 Purpose and Background 1
1.3 Applicability 1
1.4 Reference Documents 1
1.5 Interpretation 2
1.6 Road Acceptance 2
1.7 Improvements Agreements 3
Chapter 2 Road Classifications and Typical Sections 4
2.1 Road Classification System 4
2.1.1 Functional Classifications 4
2.1.2 Primary vs Secondary Classifications 5
2.2 Right -of -Way Widths 5
2.3 Right -of -Way Use Permit 5
2.4 Right -of -Way Determination 5
2.5 Right -of -Way Acquisitions 6
2.6 Typical Cross -Sections 6
Chapter 3 Surveying 18
3.1 Survey Data req-uire a survey control sheet 18
3.2 State Plane 18
3.3 Monument Boxes 18
3.4 Road Safety 18
Chapter 4 Roadway Design Criteria 19
4.1 General 19
4.1.1 Policy on the Use of Referenced Publications 19
4.1.2 Typical Plan Set Guidelines 19
4.1.3 Design Speed 22
4.2 Horizontal Alignment 23
4.2.1 Horizontal Curves 23
4.2.2 Superelevation 24
4.2.3 Transitions 24
4.2.4 Cross Slope 25
4.3 Vertical Alignment _ 25
4.3.1 Maximum and Minimum Grades _ 25
4.4 Sight Distance 26
4.4.1 Stopping Sight Distance 26
4.4.2 Passing Sight Distance 28
4.4.3 Decision Sight Distance 28
4.4.4 Intersection Sight Distance 29
4.5 Intersections 30
4.5.1 Alignment and Profile 30
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE ji
4.5.2 Corner Radii 31
4.5.3 Approval Requirements 31
4.5.4 Auxiliary Lanes 32
4.6 Cul-de-Sacs 32
4.7 Bridges 32
4.7.1 Bridge Hydraulic Capacity 32
4.7.2 Freeboard 33
4.7.3 Bridge Scour 34
4.7.4 Use of HEC-RAS 34
4.7.5 Bridge Railing 34
4.7.6 Minimum Structural Requirements 34
Chapter 5 Drainage Criteria 35
5.1 General 35
5.2 Drainage Law 36
5.3 Drainage Policy 3736
5.3.1 Submittal Requirements 3736
5.3.2 Data Collection 3938
5.4 Rainfall 3938
5.5 Runoff 39
5.5.1 The Rational Method 4140
5.5.2 Larger Basin Rainfall Methods 4746
5.6 Roads, Inlets, and Storm Drains 4746
5.6.1 Applicable Software 4746
5.6.2 Roadway Drainage 4746
5.6.3 Inlets 4847
5.6.4 Pipes 4847
5.6.5 Manholes 4948
5.7 Open Channels, Roadside Ditches, and Grass Swales 5049
5.7.1 Applicable Software 5049
5.7.2 Open Channels and Swales 5049
5.7.3 Roadside Ditches 545-3
5.8 Culverts 5554
5.8.1 Applicable Software 5554
5.8.2 Sizing 5554
5.8.3 Materials 5655
5.8.4 Cover 5655
5.8.5 End Sections and Safety Grate 5655
5.8.6 Maintenance 5756
5.9 Riprap 5756
5.10 Storage 6463
5.10.1 Retention 646
5.10.2 Detention 6564
5.10.3 Dam Information 7574
5.10.4 Irrigation Ditches/Private Irrigation Systems 7675
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE lii
5.11 Stormwater Drainage Criteria Variances 7776
5.12 Oil and Gas Stormwater Management 7877
Chapter 6 GRADING and MS4 Requirements 8079
6.1 Erosion Control & Grading Requirements 8079
6.1.1 Applicability 8079
6.1.2 Grading and Erosion Control Plans 8079
6.1.3 Implementation 818O
6.1.4 Grading Permit Deadline (Fee) & Extension 8180
6.1.5 Tracking Control 8180
6.2 MS4 Requirements 8483
6.2.1 Designated MS4 Areas and Responsibilities 848-3
6.2.2 Applicability of MS4 Requirements 8584
6.2.3 Required Permits 8584
6.2.4 MS4 Requirements for Pre -Construction 8685
6.2.5 MS4 Requirements for Construction Activity 8887
6.2.6 MS4 Requirements for Post Construction 9088
6.2.7 MS4 Requirements for As -Built Drawing Checklist 9492
6.3 Revegetation 9492
6.3.1 Site Preparation 9492
6.3.2 Seeding and Planting 9593
6.3.3 Mulching 9593
6.3.4 Maintenance 9593
6.3.5 Erosion Protection Design Criteria 9694
Chapter 7 FEMA Floodplain Requirements 9795
7.1 Background Information 9795
7.2 Floodplain Management Obligations 9795
7.3 FEMA Floodplains 9795
7.3.1 Floodplain Requirements 9895
Chapter 8 Traffic Criteria 9997
8.1 Traffic Impact Studies 9997
8.1.1 Traffic Impact Study Area 9997
8.1.2 Preliminary Traffic Impact Analysis 9997
8.1.3 Traffic Impact Study Requirements 10098
8.1.4 Traffic Impact Study Checklist 10410-2
8.1.5 Updating Existing Traffic Impact Studies 104
8.2 Change in Access Use 106104
8.3 Temporary Access 106104
8.4 Traffic Control Devices and Plans 106104
8.4.1 Signage and Striping Plans 106104
8.4.2 Striping guidance 107105
8.4.3 Type and Location of Signs 107
8.4.4 New Roadway Signage 107-5
8.4.5 Memorial Sign Applications 107.105
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE � iii
8.4.6 Construction Criteria 1084O6
8.5 Access Points 1086
8.5.1 Local Roadways 1084O6
8.5.2 Collector Roadways 109107
8.5.3 Arterial Roadways 109107
8.5.4 State Highway and Interstate Systems 109107
8.5.5 Shared Accesses 109107
8.5.6 Restricted Movement Access 110108
8.5.7 Access Control Plans 110108
8.6 Access Design 1108
8.6.1 Geometric Design 110408
8.6.2 Access Sight Distance 111109
8.6.3 Subdivision Roads Sight Distance 112110
8.7 Auxiliary Turn Lanes 113114
8.7.1 Auxiliary Lane Length 115113
8.7.2 Storage Lengths 116444
8.7.3 Auxiliary Lane Conflicts 117115
8.8 Access Construction 117115
8.8.1 Gravel Requirements 117115
8.8.2 Pavement Requirements 118416
8.8.3 Access Drainage 118446
8.8.4 Structures 118416
8.9 Average Daily Traffic Count 118446
8.9.1 Vehicle Classification 119117
Chapter 9
9.1
9.2
9.3
9.4 Pavement Design Criteria for Onsite Roadways
9.4.1 Design Equivalent Single Axle Loads (ESAL)
9.4.2 Traffic Growth Rate
9.4.3 Lane Factor
9.5 Flexible Pavement Design
Soil Investigation and Pavement Design 122120
Introduction and Purpose 122120
Field Investigation and Soil Samples 122120
9.2.1 Testing Frequency 122120
9.2.2 Sampling Procedures 1229
Subgrade Testing 122120
9.3.1 Classification 12212O
9.3.2 Swell Test 123121
9.3.3 pH and Sulfate 123121
9.3.4 Moisture Density 123121
9.3.5 Hveem Stabilometer 123121
123121
124122
124122
124122
125123
9.5.1 Serviceability and Reliability 125123
9.5.2 Standard Deviation 125123
9.5.3 Drainage Factor 125123
9.5.4 Strength Coefficients 126121
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE liv
9.5.5 Pavement Thickness 126124
9.5.6 Pavement Design 1264
9.6 Material Specification 126124
9.6.1 General 126124
9.6.2 Procedure for Material Source Approval 127125
9.6.3 Hot Mix Asphalt 127125
9.6.4 Portland Cement Concrete Pavement 128446
9.6.5 Aggregate Base Course 129127
9.6.6 Aggregate Surface Course (Gravel) 130428 Soils/Pavement Design Report 13142-9
Chapter 10 Construction Criteria
10.1 General
10.1.1 Policy on the Use of Referenced Publications
10.1.2 Control of Work and Inspection
10.1.3 Project Acceptance and Warranty
10.2 Contractor Responsibilities
10.2.1 Qualifications, Insurance Requirements, and Licensing
10.2.2 Pre -Construction Meetings
10.2.3 Permits
10.2.4 Public and Worker Safety
10.2.5 Utility Coordination
10.2.6 Dust Control
10.2.7 Traffic Control
10.2.8 Removal of Unacceptable or Unauthorized Work
10.2.9 Record Drawings and Record Keeping
10.3 Materials Quality Control and Testing
10.3.1 Qualifications of Testing Personnel and Laboratories
10.3.2 Minimum Testing Types and Frequencies
10.3.3 Material Sources and Sampling
10.3.4 Required Submittals
10.3.5 Soils Reports and Pavement Designs
10.3.6 Materials Rejection
10.4 Excavation and Embankment
10.4.1 Utility Trenching and Backfill Requirements
10.4.2 Unsuitable Materials
10.4.3 Moisture and Density Control
10.5 Subgrade Construction Methods
10.5.1 Unsuitable Materials
10.5.2 Soft Spots
10.5.3 Moisture and Density Control
10.5.4 Subgrade Proof Rolling
10.5.5 Treated Subgrades
10.6 Base Course Construction Methods
10.6.1 Gradation and Moisture and Density Control
133
133131
133131
133131
134132
134132
134132
135133
135133
135133
136134
13634
137135
137135
138446
139137
139137
139137
139137
140-
1404-3-8
140
1414-3-9
14113-9
1419
14113-9
142440
142140
142440
142140
142140
143141
143141
143141
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I v
10.6.2 Base Course Proof Rolling 144142
10.6.3 Treated Base Courses 144142
10.6.4 Acceptance Prior to Paving 145143
10.7 Pavement Construction Methods 145143
10.7.1 Pre -Paving Meetings 14543
10.7.2 Recycled Asphalt Pavement Surfaces 145143
10.7.3 Hot Mix Asphalt Surfaces 145443
10.7.4 Concrete (PCCP) Surfaces 146444
10.7.5 Pavement Cut and Patching Requirements 150147
10.8 Structures and Drainage Features 150448
10.8.1 Bridges 150448
10.8.2 Culvert and Pipe Installation 151448
10.8.3 Curbs, Gutters, and 151448
10.8.4 Concrete Structures, Manholes, and Inlets 151149
10.8.5 Retaining Walls and Slope Stabilization Measures 151149
10.9 Other Roadway Features 152149
10.9.1 Pavement Markings 152149
10.9.2 Traffic Control Devices (Signs and Signals) 152449
10.9.3 Trees and Plantings 152-5A
10.9.4 Sidewalks and Trails 15358
10.9.5 Guardrails 153150
10.9.6 Fences 153150
10.9.7 Cattle Guards 154151
Chapter 11
11.1
11.2
11.3
11.4
11.5
Permitting 155152
Transport Permit 155152
Right -of -Way Use Permit 155152
Access Permit 155152
Grading Permit 155152
Floodplain Development Permit 156153
Chapter 12 Variance Requests 1574
LIST OF FIGURES
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Figure 2-7
Figure 2-8
Figure 4-1
Figure 4-2
Rural Local and Collector Roads (Unpaved) (Interim) 109
Rural Local (Ultimate) 1140
Rural Collector (Paved) 1244
Rural Arterial 133
County Highway 144-3
Urban Local 1544
Urban Collector 165
Urban Arterial 174-6
Horizontal Curve 2324
Minimum Tangent from Intersection 242-3
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I vi
Figure 4-3
Figure 4-4
Figure 4-5
Figure 4-6
Figure 4-7
Figure 5-1
Figure 5-2
Figure 5-3
Figure 5-4
Figure 5-5
Figure 5-6
Figure 5-7
Figure 5-8
Figure 5-9
Figure 5-10
Figure 5-11
Figure 8-1
Figure 8-2
Figure 8-3
Figure 8-4
Figure 8-5
Figure 8-6
Figure 8-7
Figure 9-1
Intersection Cross Slope Detail 2524
Horizontal Sight Distance 272-6
Crest Vertical Curve 2827
Departure Sight Triangles at Intersection (Stop Control) 3029
Typical Intersections 3130
Weld County Watersheds 3635
Manning's n vs. Depth for Low -Flow Section in a Composite Channel 5351
Manning's n vs. VR for Two-Retardances in Grass -Lines Channels 5452
Riprap Apron Detail for Culverts In Line with the Channel (USDCM, Vol 2 Figure 9-34)5957
Expansion Factor for Circular Conduits (USDCM, Vol 2 Figure 9-35) 6058
Expansion Factor for Rectangular Conduits (USDCM, Vol 2 Fig 9-36) 6159
Riprap Erosion Protection at Circular Conduit (Valid for Q/D2.5<6.0) (USDCM,
Vol 2 Figure 9-38) 6260
Riprap Erosion Protection at Rectangular Conduit Outlet (Valid for WWH1.5<8.0)
(USDCM, Vol 2 Figure 9-39) 6361
Water Quality Capture Volume (WQCV) Based on BMP Drain Time (USDCIV,
Vol 3 Fig 3-1) 6866
Outlet Structure Plan and Profile Example 7169
Emergency Spillway Typical Design 7371
Access Approach 111143
Departure Sight Triangles at Access (Stop Control) 112104
Subdivision Road Sight Distance Triangle 112104
Auxiliary Lanes Layout 113105
Geometric Components of A Deceleration Lane 1146
Geometric Components of an Acceleration Lane 11510-7
Tracking Control for Temporary Accesses Error! Bookmark not defined.111
FHWA Vehicle Classification (CDOT M -E Pavement Design Manual, Figure 3.6) Error!
Bookmark not defined.
LIST OF TABLES
Table 2-1
Table 2-2
Table 4-1
Table 4-2
Table 4-3
Table 4-4
Table 5-1
Table 5-2
Table 5-3
Table 5-4
Table 5-5
Table 5-6
Table 5-7
Typical Cross Sections Summary (Rural) 7
Typical Cross Sections Summary (Urban) 98
Roadway Design Criteria 2221
Stopping and Passing Sight Distances and K Values 2726
Decision Sight Distance 2928
Design Frequencies 3332
Runoff Coefficient Equations for Weld County/2008 MHFD (HSG-a) 4139
Percentage Impervious Values for Weld County 4240
Runoff Coefficient Equations for Weld County/2007 MHFD (HSG-A) 4341
Runoff Coefficient Equations for Weld County/2007 MHFD (HSG-B) 4442
Runoff Coefficient Equations for Weld County/2007 MHFD (HSG C/D) 4543
NRCS Conveyance Factor, K 4644
Inlets for Weld County 4846
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A G F Ivii
Table 5-8
Table 5-9
Table 5-10
Table 5-11
Table 5-12
Table 5-13
Table 5-14
Table 5-15
Table 5-16
Table 8-1
Table 8-2
Table 8-3
Table 8-4
Table 8-5
Table 8-6
Table 8-7
Table 8-8
Table 9-1
Table 9-2
Table 9-3
Table 9-4
Table 9-5
Table 9-6
Table 9-7
Table 9-8
Table 9-9
Table 9-10
Table 9-11
Table 9-12
Table 10-1
Test Requirement and Frequency
Test Requirement and Frequency
Equivalence Load Factors (CDOT Pavement Design Manual, Table H.2)
Lane Factors (Modified from CDOT Pavement Design Manual, Table 3.3)
Serviceability
Theoretical Capacity of Inlets for Weld County
Manhole Sizes
Roughness Coefficients ("n") for Channel Design (After Chow 1959)
Trapezoidal Channel Design Guidance/Criteria
Maximum HW/D Requirements for Weld County
Classification and Gradation of Ordinary Riprap
Drain Time Coefficients for WQCV Calculations
WQCV Outlets Orifice Plate Perforation Sizing
Non -Jurisdictional vs Jurisdictional Dam Criteria Summary
4846
4947
5250
5452
5654
6462
6866
6967
7673
Updating on Existing TIS 1069-8
Minimum Access Spacing Criteria (feet)
Access Geometry
Auxiliary Lane Requirements
Components of Speed Change Lane Lengths for Rural Highways (R -B) from State
Highway Access Code
Acceleration/Deceleration Lane and Taper Design Criteria and Redirect Taper for
Through Lanes
1084-00
1104O2
114106
116108
116108
Grade Adjustment Factors for Acceleration Lanes 11610-8
Auxiliary Lane Storage Lengths 117449
Error! Bookmark not defined.11'I
124117
124117
125117
Reliability Factor
Drainage Factor
12544-8
Strength Coefficient 12611-9
Master Range Table for Hot Mix Asphalt from Table 703-4 in CDOT's Standard
Specifications for Road and Bridge Construction 12812-0
Concrete Aggregate Gradation Table from Table 703-1 in CDOT's Standard
Specifications for Road and Bridge Construction
Aggregate Base Course Requirements
129121
130122
Aggregate Surface Course Requirements 131123
Pavement Marking Types on Concrete 14743-8
LIST OF APPENDICES
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Weld County Drainage Basin Map
Drainage Report Checklist
CDOT Operations and Maintenance Plan Guidelines
As -Built Drawing Checklist
USDCM 2007 Runoff Coefficients
Rational Formula -Based Modified FAA Procedure
Grading Permit Checklist
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE viii
Appendix H
Appendix I
Appendix J
MS4 Pollution Prevention Plan Checklist and Manual
Traffic Impact Study Checklist
Weld County Standard Details
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF lix
This page intentionally left blank.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I x
CHAP TER 1 GENERAL PRO VISIONS
1.1 TITLE
This manual is called the Weld County Engineering & Construction Criteria and will be referred to
throughout the text as the WCECC.
1.2 PURPOSE AND BACKGROUND
Communities and counties often provide engineering criteria for the repair and construction of
infrastructure, outlining specific "must build" requirements. In Weld County, Colorado, which covers
4,000 square miles, the range of soil types and site conditions is so varied that it is not practical or
advisable to develop specific requirements. In Weld County, one size does not fit all.
However, recognizing the need in the engineering community for basic information about the County's
criteria for acceptable infrastructure, the County has developed this document. It outlines design and
material options and guidelines for the design, construction, location, improvement, and maintenance
of infrastructure in Weld County.
The criteria outlined in this manual are intended to provide the designer with guidance tc facilitate the
development of infrastructure that is well suited to County needs and is safe, efficient, and economical.
Some cases may arise where conformance to these criteria will be exceptionally difficult. In such cases,
requests for variance to these criteria will be considered on a case -by -case basis. The overriding
requirement is that all improvements must be designed and constructed with professional integrity and
quality at the forefront. Additionally, designs will consider sustainability (reuse of existing materials
where practical) and long-term total cost of ownership through life -cycle cost analysis.
1.3 APPLICABILITY
The WCECC applies to all lot dividers, developers, landowners, and owners of facilities adjacent to or
located in the County's rights of way or easements —and to the employees, agents, or contractors of
these entities —when they design, construct, and maintain facilities or conduct other activities subject to
review and approval under the provisions of the Weld County Code. The WCECC also applies to the
County and its employees, agents, and contractors.
1.4 REFERENCE DOCUMENTS
The WCECC hereby adopts the latest versions of the following documents by reference. However, some
of these references represent nationwide and statewide standards, respectively, which do not always
satisfy County conditions. When standards differ, the instructions and guidance in this manual will
govern.
• American Association of State Highway and Transportation Officials (AASHTO) A Policy on
Geometric Design of Highways and Streets
• AASHTO Guide for Design of Pavement Structures
• AASHTO Roadside Design Guide
• AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and
Testing
• AASHTO Standard Specifications for Highway Bridges
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A 6 E 1 1
• AASHTO Load & Resistance Factor Design (LRFD) Bridge Design Specifications
• AASHTO LRFD Bridge Construction Specifications
• American Society for Testing and Materials (ASTM) Annual Book of ASTM Standards
• Colorado Department of Transportation (CDOT) Access Control Plans
• CDOT Bridge Design Manual
• CDOT Construction Manual
• CDOT Drainage Design Manual
• CDOT Field Materials Manual
• CDOT M&S Standard Plans
• CDOT M -E Pavement Design Manual
• CDOT Roadway Design Guide
• CDOT State Highway Access Code
• CDOT Standard Specifications for Road and Bridge Construction with Weld County Special
Revisions (aka Weld County Department of Public Works Conformed Standard Special Revisions
to CDOT's Standard Specifications for Road and Bridge Construction)
• CDOT Survey Manual
• Colorado Revised Statutes
• Relevant Federal Emergency Management Agency (FEMA) documents
• Federal Highway Administration (FHWA) Manual on Uniform Traffic Control Devices (MUTCD)
• FHWA Roundabouts: An Informational Guide (NCHRP Report 672)
• FHWA Railroad/Highway Crossing Grade Handbook
• FHWA Real Estate Acquisition Guide for Local Public Agencies ("The Uniform Act")
• Institute of Transportation Engineers (ITE) Trip Generation Manual
• Mile High Flood District (MHFD) Urban Storm Drainage Criteria Manual (USDCM)
o MHFD is formerly Urban Drainage and Flood Control District (UDFCD)
• Transportation Research Board (TRB) Highway Capacity Manual
• Weld County Code
• Weld County Transportation Plan
1.5 INTERPRETATION
This manual presents the basic criteria that must be met to ensure that infrastructure facilities are safe,
efficient, economical, and appropriate for use in the County. Where minimum values are stated, greater
values for safety, durability, or functional limits are encouraged whenever practical and consistent with
federal, state, and local requirements. Situations might arise where the application of individual criteria
from the WCECC will not ensure the protection of public health, safety, and welfare. Accordingly, Weld
County may choose not to accept the infrastructure for taxpayer -funded maintenance; may impose
additional or more stringent criteria than those contained in the WCECC; or may require the
modification of plans, specifications, or operations to protect public health, safety, and welfare.
1.6 ROAD ACCEPTANCE
Acceptance of a road for maintenance by the County is at the discretion of the Board of County
Commissioners (BOCC) and requires passage of a resolution. The Weld County Road Acceptance Policy
requirements are available in Section 8-6-150 of the Weld County Code.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 2
I
1.7 IMPROVEMENTS in REIMBURSE ENT AGREEMENTS
Subdivisions, Planned Unit Developments, Final Plats, Uses by Special Review (USR) and Access Permits
may require the developer to sign an improvements agreement with the County and provide collateral
to guarantee the improvements are completed as required for one or all the following reasons:
• Off -site public improvements
• Road Maintenance Agreement
• Construction Maintenance Agreement
• Access Improvements Agreement
• On -site improvements for subdivisions/PUDs
development that uses the original developer's road improvements.More information can be found in
Chapter 8, Article II, of the Weld County Code.
An Improvements and Road Maintenance Agreement will detail the approved haul route(s), outline
when offsite improvements will be triggered, and include a maintenance agreement for the haul routes.
Possible mitigations included in the road maintenance agreement may include, but are not limited to,
dust control, specified haul routes, damage repairs, and future improvement triggers. An example
agreement is available at:
eview/usr spr
https://www.weld.gov/files/sharedassets/pu
blic/v/1/departments/public-works/documents/usr-spr-permits-improvements-agreement-
template.pdf
Weld County uses the Equivalent Single Axle Load (ESAL) methodology when calculating an
Improvements Agreement proportional share. The ESAL methodology is a national standard for
normalizing traffic counts to reflect the actual damage caused by large vehicles. The ESAL method data
is as follows:
*Add factors & equation.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I3
CHAPTER 2 ROAD CLASSIFICATIONS AND TYPICAL SECTIONS
2.1 ROAD CLASSIFICATION SYSTEM
The County classifies roadways based on their function and whether they are urban or rural. These two
classifications help designers determine the appropriate design characteristics for the road, including
cross section and geometric standards. The functional classifications and urban/rural classification
consider anticipated traffic volume and access requirements on a road and determine the minimum
right-of-way required. Together, these classifications help determine the minimum level of service (LOS).
They are a rational, cost-effective basis for the selection of geometric criteria within the range of values
available to the designer.
The BOCC adopts a Road Classification Map by ordinance and reviews it every two years. Changes made
between the two-year reviews typically are based on development reviews and are made on a case -by -
case basis via a public hearing process. The current Weld County Functional Classification Map can be
found on the Public Works Department's Transportation Planning web page. In addition, the Weld
County Transportation Plan includes recommendations for when to modify road classifications.
2.1.1 Functional Classifications
Function is determined based on the degree to which a roadway provides access and allows mobility
Roadways provide access when they allow travelers to easily reach most of the destinations within a
given area. Roadways provide mobility when they allow travelers to easily go longer distances.
The classification of Weld County roads is comprised of a hierarchy of roadways whose functional
classifications are defined by their usage. The relative degree to which a road serves these functions
defines its functional classification. Roads in Weld County are classified as Arterial, Collector, Local, or
Private Roads. The functional classifications of roadways used by Weld County are described below.
2.1.1.1 Arterials
A county highway refers to a highway defined in House Bill 16-1155. In Weld County a county highway is
a four -lane controlled -access arterial road intersecting with an interstate highway, United States
numbered highway, or State Highway. Roads that were annexed before the County's designation of the
road as a county highway also may be included by intergovernmental agreement (IGA) with the
municipality. Weld County has designated Weld County Road 49 (WCR 49) between Interstate 76 (I-76)
and U.S. Highway 34 (US 34) Weld County Parkway, and Weld County Road 47 (WCR 47) from the
Parkway to State Highway 392 (SH 392) as county highways. See the Weld County Functional
Classification Map, available on the County's Transportation Planning webpage. The county highway
designation means Weld County will govern all substantive aspects of the road, including access,
maintenance, traffic control, speed limits, and overweight limits, even if municipalities later annex the
road
Arterials provide good mobility, carrying significant traffic volumes at high speeds for long distances.
They are seldom spaced at closer than one -mile intervals and serve to connect larger communities. The
primary difference between interstate highways and arterials is access. Interstate highways have fully
controlled accesses with no at -grade intersections, while arterials include limited at -grade intersections.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 4
2.1.1.2 Collectors
Collectors link local roads with the arterial road system and connect smaller communities. Both mobility
and access are of equal importance on these roadways. Travel speeds and volumes are moderate, and
distances traveled are short to medium. Traffic on collector roads typically has an origin or destination
within the nearby area. Weld County has both paved and unpaved collector roads.
2.1.1.3 Local Roads
Local roads primarily provide access to adjacent land in rural and urban areas. Local roads are closely
spaced and carry relatively lower traffic volumes for short distances. They generally are internal to —or
serve an access function for —a residence, farm, single neighborhood, or development. Generally, they
should lead traffic to a collector road.
2.1.1.4 Privately Maintained Roads
Weld County may review privately maintained roads that are planned to be used by the public, such as a
road within the boundaries of a residential subdivision, but the roads will be maintained by a
homeowner's association (HOA) or other private entity.
2.1.2 Urian anct Rural Classifications Primary vs Secondary Classifications
In addition to classifying roads by function, the Weld County Transportation Plan classifies roads as
Urban or RuraiPrimary or Secondary per (C.R.S.) § 43-2-101.
Urban Primary roads usually serve more developed areas and diverse uses (e.g., bicyclists, pedestrians,
on -street parking, etc.). Urban Primary roads usually are paved, with curbs, gutters, and sidewalks.
Often, they connect to an existing stormwater drainage system rather than making use of roadside
ditches (which are found commonly beside rural roads).
Rural Secondary roads primarily serve less developed areas and lower volumes of vehicular traffic. The
majority ofMost of the roads in Weld County are classified as ruraisecondary. However, roads that are in
municipal Urban Growth Boundaries may be classified as urban/primary.
2.2 RIGHT-OF-WAY WIDTHS
The minimum right-of-way widths are as follows, unless otherwise approved by the BOCC
Arterial
140
feet
Collector
80
feet
Local
60
feet
2.3 RIGHT-OF-WAY USE PERMIT
Permits are required when working within the County road right-of-way. More information can be found
in Section 11.2 of this document. See also Weld County Code, Chapter 8, Article XIII, Sec. 8-13-10, et seq.
It is not the intent to allow new private irrigation systems to be located within County road right-of-way.
2.4 RIGHT-OF-WAY DETERMINATION
On October 12, 1889, the BOCC declared all section and township lines on the public domain of the
United States in Weld County to be public highways with the intent of constructing roadways on these
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 15
lines. With this order and for this purpose, the BOCC also established 30 feet of road right-of-way on
each side of the section or township line (a total of 60 feet). Sections not included in the public domain
are railroad sections, school sections (usually 16 and 36), and sections patented prior to October 12,
1889. Not all County roads are a result of the 1889 Resolution. Many Weld County rights of way have
been conveyed by landowners through road petitions and dedications, as well as Weld County
acquisitions working with landowners.
Due to topography, cost, and other factors, not every (county road is situated within the 60 -foot road
right-of-way and/or centered on the section line. In some places, additional right of wayright-of-way has
been acquired or reserved. The right of way section of right -of wayorks web page right-of-way section of
the Public Works web page discusses this in more detail. The County recommends that designers review
this information and also do their own research into right of way in the areas of their projects.
The Weld County right-of-way road files are located in the office of the Clerk to the Board at 1150 O
Street in Greeley, Colorado. Please call (970) 400-4225 to set up a time to come in.
2.5 RIGHT-OF-WAY ACQUISITIONS
Acquisition of road right-of-way will substantially follow the Real Estate Acquisition Guide for Local
Public Agencies published by the FHWA, the Uniform Relocation Assistance and Real Property
Acquisition Policies Act of 1970, 42 United States Code (U.S.C.) Ch. 61 (the "Uniform Act"), and Title 38
of the Colorado Revised Statutes (CRS).
2.6 TYPICAL CROSS -SECTIONS
While it is important to try to preserve the ultimate road right-of-way, funding availability does not
always allow for construction of the ultimate section and, in such cases, an interim section should be
constructed until funding becomes available.
The Public Works Department determines whether a road is designed to the interim or ultimate (or
combinations thereof) road cross section. This determination is based on funding, existing and projected
traffic volumes, connectivity, continuity, mobility, and capacity. If only a portion of the ultimate cross
section is being constructed, the interim design will need to allow for eventual widening of the road to
the ultimate cross section. The interim design should ensure that the first phase of the roadway will not
need to be removed to complete the full cross section. Storm drainage designs and floodplain analysis
will be considered and be constructed to accommodate the ultimate section, unless written approval is
obtained from the Public Works Department.
All designs should consider how the roadway is used, long-term traffic predictions, location and density
of nearby development, and topographical characteristics. A roadway constructed to the ultimate cross
section still may require more right-of-way and roadway width in the future for additional lanes,
pedestrian or bicycle facilities, landscaping, utilities, or construction requirements, such as cut or fill
slopes. Designers should try to anticipate such needs. Other chapters within this manual will discuss
design considerations in more detail.
Table 2-1 (Rural Conditions) and Table 2-2 (Urban Conditions) summarize some of the features
incorporated into the typical cross section drawings for the different road classifications. Figure 2-1
through Figure 2-8 present examples of typical cross section drawings for interim and ultimate roadway
types found in the County. Note that the tables and typical sections in this manual usually reflect
minimum requirements. The Public Works Department may impose additional requirements on a case -
by -case basis.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 6
Table 2-1 Typical Cross Sections Summary (Rural)
Number
of
Roadway
Right
-of
-Way
Road
Travel
Lanes
Travel
Lane
Shoulder
Width
Median
Width
Classification
Width (min.)
Surface
(min.)
Width
(min.)
(min.)/Type
(min.)/Type
Drainage
RURAL ROADS (INTERIM)
Arterial
Collector
Collector
(Unpaved)
Local (Unpaved)
140 ft
80 ft
80 ft
60 ft
County
Highway
Arterial
Collector
Local
Non -maintained
Local -
Residential
Non -maintained
Local —
Residential
140 ft
140 ft
80 ft
60 ft
30 ft
30 ft
Paved
Paved
Gravel
Gravel
Paved
Paved
Paved
Paved
Unpaved
RAP
Unpaved
Gravel
2
12 ft
12 ft
12 ft
12 ft
6 ft Paved
2 ft Gravel
4 ft Paved
2 ft Gravel
2 ft Gravel
2 ft Gravel
RURAL ROADS (ULTIMATE)
12 ft
12 ft
12 ft
12 ft
10 ft
13 ft
N/A
N/A
N/A
8 ft Paved
2 ft Gravel
8 ft Paved
2 ft Gravel
6 ft Paved
2 ft Gravel
1 ft Paved
1 ft Gravel
2 — 5 ft Gravel
2-2 ft Gravel
N/A
16 ft
Paved
0 ft to 28 ft
Paved or
Unpaved
Separation
0ftto 16 ft
Paved
N/A
N/A
N/A
Roadside Di
Roadside Di
Roadside Di
Roadside Di
Roadside Di
Roadside/N
Ditch or Sto
Sewer
Roadside Di
Roadside Di
Roadside/Uti
Culverts nee(
located outsi
ROW on lanc
property
Ditch swale
Culverts nee(
located outsi
ROW on land
•
ro pe rty
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 8
Table 2-2 Typical Cross Sections Summary (Urban)
Classification
Roadway
Right
Width
-of
-Way
(min.)
Surface
Road
Travel
Number
(min.)
Lanes
of
Travel
Width
(min.)
Lane
Shoulder
(min.)/Type
Width
Median
(min.)/Type
Width
Drainage Type
Sidewalk
Width
(min.)
URBAN
ROADS
(INTERIM)
Arterial
140
ft
Paved
2
12
ft
6
2
ft
ft
Paved
Gravel
N/A
Roadside
Storm
Sewer
Ditch
or
N/A
Collector
80 ft
Paved
2
12
ft
5
1
ft
ft
Paved
Gravel
N/A
Roadside
Ditch
N/A
Local
60
ft
Paved
2
12
ft
1
1
ft
ft
Paved
Gravel
N/A
Roadside
Ditch
N/A
URBAN
ROADS
(ULTIMATE)
Arterial
140
ft
Paved
4
12
ft
16
ft
Paved*
16
or
ft to 28
Raised
Median
ft Paved
Curb
Storm
& Gutter
Sewer
and
10
ft
Collector
80
ft
Paved
2
12
ft
8
ft
Paved*
0
ft
to
16
ft Paved
Curb
Storm
& Gutter
Sewer
and
5
ft
Local
60
ft
Paved
2
12
ft
8
ft
Paved*
N/A
Curb
Storm
& Gutter and
Sewer
5
ft
*includes gutter pan width
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 19
Figure 2-1
Rural Local and Collector Roads (Unpaved) (Interim)
I
R.O.W. (See Note 5)
wog _
16' a -/-
12'
Buffer
Varies
NOT TO SCALE
INN
Shoulder
Compacted Subgradc
* ABC
Travel Lane
IT
2'
16'+/-
Travel Lane
INTERIM TYPICAL
CROSS SECTION
Typical Gravel Road
-Shoulder Buffer
Notes:
0-
1. * The allowable class and thickness of
Aggregate Base Course (ABC) shall be
determined by the guidelines described
in the Pavement Design Chapter.
The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated
3. All sideslopes shall be seeded and mulched.
4. Additional ROW may be required by Public
Works to meet site specific requirements.
5. Width of ROW shall be determined by
classification of road.
6. Signing per approved plan.
Computer File Information
Creation Date: 0711 Oil 0 Initials: KH
Last Modification Date: 04108:16 Initials: ddd
Full Pads: T:TBSCWdminTroposals1Wcldc
Drawing Elk Manic:
Micas* u r n Vet XM Scale: N.T.S. Units: English
WELD COUNTY
PUE31.1C WORKS DEPARTMEN1
MI 11 N Screen Fist Office Box 794
Greeley, Cokado *0632-075$
Phone: 4970) ifbi-6496
Fax: (970) 3M-697
kern cd
Revisal -
Revised:
INTERIM RURAL LOCAL.
AND COLLECTOR ROADS
Designer Weld County
Deta kr. K. Hinnenkamp
FIGURE Na i
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 110
Figure 2-2
Rural Local (Ultimate)
ore
Ina
tit
Butler
Varies
2K'
w
�•
Shoulder ,
r�
NOT TO SCALE
a.
t
,4t
12'
•
12'
Travel Lane ; Travel Lane
•
• HMA
•
2% i 2%
1
Shoulder
q.
ii' .I1=1tit 'll=ii=deli=11'11=r1=li
all a MI
ABC
(Class 5)
• HMA
• ABC (Class 6)--
•
Compacted Subgrade
TYPICAL
CROSS SECTION
Notes:
Buffer
I. • The allowable class and thickness of Hot
Mix Asphalt (HMA) and Aggregate Base
Course (ABC) shall be determined by the
guidelines described in the Pavement
Deign Chapter.
2. The foreslopes and backsiopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated.
3. All sideslopes shall be seeded and mulched
4. Additional ROW may be required by Public
Works to meet site specific requirements.
Satzning and striping pei appro‘ ed plan
Computer File Information
(nata. , Dal4 0' II) 10
K
t a.) Wl CiI CITS 1 r►.it: I t l 'Ot' 12
WELD COUNTY
PL'F31.IC WORKS DEPARTMENT
III Fist I PBS(' Adnui .Proptnals 11 eiif.
Dra W n2 File \smc
\kiv! aaro 1cr XM Scale KT -S t rict I ngti,Il
111) t t Stnvi i Pai Otricc Bo% "c'
(lfc: lc% l uiurat,t K0O!2.O7%'
Mont t4'U► 304.64%
at Iror104 491
ANN%
Re.vvd
K c• i .ai
RURAL LOCAL
'k.�rner Weld ('ountt.
K Hinncnl.emr
FIGURE NO. 2
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X11
Figure 2-3
Rural Collector (Paved)
•
22'
Buffer Shoulder
Varies
y
,, Varies
NOT TO SCALE.
80' R.O.W.
36'
6'
24'
6'
12'
I
1
1
Travel Lane Travel Lane
Ifir
2%
1
* HMA
2%
•
•
22'
Shoulder Buffer
;-T--1
1
Iq
I
ABC
(Class 5)
* HMA —
* ABC (Class 6)
Shoulder/_./
Multi -Use
20'
Butter
-M7,11 i I 1 ;i I FI I I I FI I I
Compacted Subgrade
INTERIM TYPICAL
CROSS SECTION
80' R.O.W.
1
40'
•
8'
houldcr/
Multi -Use
6'
8'
Shoulder
Multi -Use
10.
11'
12'
Travel Lane ' Travel Lane
* HMA
` 2 I
`
ABC
(Class 5)
* HMA
* ABC (Class 6)
Compacted Subgrade
ULTIMATE TYPICAL
CROSS SECTION
20'
Buffer
Notes:
1. * The allowable class and thickness of Hot
Mix Asphalt (HMA) and Aggregate Base
Course (ABC) shall be determined by the
guidelines described in the Pavement
Design Chapter.
2. The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated
3. All sideslopes shall be seeded and mulched.
4. Additional ROW may be required by Public
Works to meet site specific requirements.
5. Signing and striping per approved plan.
•
Computer File information
Creation Date: 02110110 Initials: KM
Last Modification Date: 01/04:' 12 Initials: KU
WELD COUNTY
PUBLIC WORKS DEPARTMENT
Full Path: TAPBSC'Admin\Pwposals'.Wcldc
Draw trig Fie Natne:
Mia m Sn Vet XM Scale: N.T.S. Units: English
till N Succtticst olliae liox 75x \PP" rd
Otvetry, Colorado 80632-U'5t Kr, mNi*
Phone- 4970) 304-6406
Fax: (970) 304-6497 Rr, Ica
RURAL COLLECTOR
Designer: Weld County
Detaikr: K. Hinncnkamp
FIGURE NO. 3
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 112
Figure 2-4
Rural Arterial
sty
Buffer
Varies
22' 2W
Buffer
Varies
a
INF
8'
sty
i
140' it.O.W.
40'
s..
v
Shoulder/. 6' 12' 12' «.. 6' houlder
'ravel Lane I ravel Lane
ABC
(Class 5)
• HMA
Compacted Subgrade
— • ABC (Class 6)
INTERIM TYPICAL
CROSS SECTION
C
I
140' it.O.W
84'-96'
10' ___ 24' _-- 0'
Shoulder/
Multi -Use
8'
ravel Lane
V -/TI F:am! flap rsL-ra r Ztry• .� r a .•v f�7.� r r; T!f • e,+• y�' .-47 Seal WaivniNtrai; •
1� �►�.1!"If �ff�f1111 q�����'i�������t�-.tr �1 it lt--lt�l�-t�-11 � �--r�-��-�t-�t--YI _II��f�1: ••.....•.. •.
. �fl liana»'r�1friitti tTin%.LlriL'n�.�1 iL��1���1�1i .�.b ilttl“� �1�.H..1
•_If_4f_L_1.-.. �it_n_tt_11.11=ri-.:11-11=11111-1111=.11=1)-.)1=11
Travel Lane
44
50'
13u tier
24' 10' 1 22' - 28'
ravel Lane Travel Lane
• HM
Shoulder/
Multi -Use
—ABC •HMA—
(Class 5)
NOT TO SCALE
• IINIA
ABC
(Class 5)
ULTIMATE TYPICAL
CROSS SECTION
* ABC (Class 6)
Buffer
ekt-
Compacted Subgrade
.+
Notes
1. * The allowable class and thickness of Hot
Mix Asphalt (HMA) and Aggregate Base
Course (ABC) shall be determined by the
guidelines described in the Pavement
Design Chapter.
2. The foreslopes and backsiopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated.
3. All sideslopes shall he seeded and mulched.
4. Additional ROW may be required by Public
Works to meet site specific requirements.
5. Signing and striping per approved plan.
Computer File 1nfomiation
! rc.4t,,•c :tic 1)2 Iii IU Eutula Ktl
.hi \! .l t'..��. 41 IL,: 1l (1.4 12 IneIul. Kit
WELD COUNTY
PUBLIC WORKS DEPARTMENT
1 P.'i I PUS( Pr'1..'';tl.. 1l lltk
,knot n; F Ic \irrt
then : itr ho 1:7 \\I ski.. \ I N I tut+ I ngll•h
till II Strict Pon Office Bel 7:$
Gwcky. Colorado ns%241'S*
Phone. (970) W.$.M•rt*
Flt ern) ZG4-64
kpfv ,cd
Rc, Ned
ItoPeal
RURAL ARTERIAL
nnicio Weld ( ount}
lY.t� 4r K Ilinn:nkant
FIGURE NO. 4
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 113
Figure 2-5
County Highway
41
140' R.O.W.
28'
Buffer
Varies
N -
10' 24'
..r w
Shoulder/
Multi -Use 12'
Travel Lane
x'
a2r10
1T
IPS
Travel Lane
I
16'
Left Turn Lane
NOT TO SCALE
24'
12' 12'
"Travel Lane Travel Lane
*PCC
1o./
10'
r+►
Shoulder/
Multi -Use
x'
* ABC (Class 6)
Compacted Subgrade
COUNTY HIGHWAY TYPICAL
CROSS SECTION
se.
2W
Buffer
Notes:
1. * The allowable class and thickness of Portland
Cement Concrete (PCC) and Aggregate Base
Course (ABC) shall be determined by the
Duidelines described in the Pavement
esign Chapter.
2. The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated.
3. All sideslopes shall be seeded and mulched.
4. Additional ROW may be required by Public
Works to meet site specific requirements.
5. Signing and striping per approved plan.
Computer File Information
Creation Date: 02!1 Of t 0 lainalc: KFt
Last Modification Date: 01'04' 12 Initials: IC I
WELD COUNTY
PUBLIC WORKS DEPARTMENT
Full Path: T:' PSSCAdmin`Proposals% Welde
Drawing File Name:
MILIaii360I Vet. XM Scale: N.T.S. Units. English
1111 H StmtPost Ofrxcr Sox 79?t
Grccicy. Colorado 80632-0758
Phone 1970) 304.64%
Fax: 1070p 304-6497
ARuomi
knisod:
Recd:
COUNTY HIGHWAY
Designer Weld County
Dct.ukr: K. Hinncnkamp
FIGURE NO. 5
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X14
Figure 2-6 Urban Local
4'.
I
60' R.O. W
hoe
mot
owe _
28'
•
Buflcr
Shoulder
Varies
•
11'
1''
T rat cI Lane
• LIMA
I
Tr -a% el Lane
2°0
16'
Buffer
Shoulder
fir.•. �•- -�f tz����r`��1��/1�//�'//�11/��v��fl—lt—se •�— �•
algae" =1 i:=1t = Ilrlll--1l.il.Il�11-��=�ij"Ili'' U
ABC
(Class 5)
• HMA--
• ABC (Class 6)
Compacted Subgradc
INTERIM TYPICAL
CROSS SECTION
ci
I
off RDA W,
l
vfi
10'
Sidewalk'
Curb
Buffer
S'
!Me _
I
40'
10'
K'
Shoulder
Multi -Use
12'
Travel Lane
10/
. /a
I
t
• IIMA
I
12'
Travel Lane
2%
8'
• • Z. .: a :r,sa hied• ftsass re ��nai_-..►.. ,�.
livelierIli n .: ir_ugu // a Willn ir_- fi ir= Si
Shoulders
Multi -Use
Sidewalks
Curb/
5' Buffer
1'
ABC (Class 6) —
Compacted Subgradc
ULTIMATE TYPICAL
CROSS SECTION
5' Minimum Sidewalks as Required by Public Works
No 1-0 SCALE
Computer File Information
Crc.ct►.c t k to (12 10 10 ht)ra& KH
lJo M•xf'('.athn Nth- t)I tt: 1.3 Inutak KH
F.dl Path r PBS(' AJrnin flrop•.i..41. 11 rltl.
Dritl Int F k \a nr
•.Ifcrov43tam ‘?r \ T • I nit• I aglish
Notes:
I • The allowable class and thickness of Hot
Mix Asphalt (HMA 1 and Aggregate Base
Count (ABC) shall be determined by the
guidelines described in the Pavement
Design Chapter.
3.
4.
,WELDCOUNTY
PU BLIC WORKS DEPARTMENT
1111 H Street Post O1114C Box 7)*
(;rrckr. (o$n'a1•n M)bt;J)7%Jt
piker 407a) k)44l%
Fan ern, 1Os-Msv
krorna
Rculat
Roil•cti
The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6: 1 or flatter where it can be accommodated.
MI sideslopes shall be seeded and mulched
Additional ROW may be required hw Public
Works to meet site specific rcquircmen1.
\wiling ,and Nu iptn,' per approved plan.
URBAN LOCAL.
kvZc' 11cIJl IJI1I%
),1•1;:r I I line;; r;i.,irnp
1 FIGURE NO. o
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 115
Figure 2-7 Urban Collector
v _
roe
80' R.o.w.
Varies
22'
Buffer Shoulder
fr
,41 _
NOT TO SCALE
2.2'
S.
lot _
36'
•
.m.
I
24'
ok.
Fl er
12'
Travel Lane
•
I
Cif 12'
CrTravel Lane
t
•HMA
2%
t
3
5'
Shoulder
�411, "IFS .tine Te ei• s We e a Wa Wa (/a gre.e awma Weliee se _ l
1 iralI.=111' 1=31i r= igIt_11aII_ifhTr 1[411=1I~liali__ .•
ARC
(Class 5)
• ILMA —
• ABC (Class 6) --
Sidewalk/
Curb/
Buffer :e7.4..
g
Os*
Compacted Subgrade
INTERIM TYPICAL
CROSS SECTION
r
I
4
1
- p
Sidewal►.
Curb/
�.--5' Buffer
K'
Shi'ulcicr
Multi -1 a
12'
t
r
12'
ll'
•.►N Cl i inc , Travel Lane
r,
• HM.\
,
•
2%
should&
Multi -Use
Plasj
.• .. u--••��f��i��'�t!��tl�•'it��ij���ffw��-"1•�•ff ^- •. .•
1=lielielleli�il=ll.-llf:nsn11c..a l 11=11-ti.:hell =114
• ABC (Class 6)
,
Camp.tct:d Suh_iadL
ULTIMATE TYPICAL
CROSS SECTION
I
5' Minimum Sidewalks as Required by Public Works
Notes;
a
1. • The allowable class and thickness of llot
Mix Asphalt (HMA) and Aggregate Base
Course (ABC) shall be determined by the
guidelines described in the Pavement
Design Chapter.
The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6:1 or (latter where it can be accommodated.
3. All sideslopes shall be seeded and mulched.
4 Additional ROW may be required hs Public
Works to meet site specific requirements
5 Srtzntrig and striping per approved plan
Computer File inlortnation
Cm:S=L `ic IQ lit lit bifiuft 1.H
p.
1.n1Mo,bltati.,i11.tk u1 (4 I2 hots'', K11
WELD COUNTY
PUBLIC WORKS DEPARTMENT
Fill Path r PBS(' A.lmrn %k cl+it
ikaa�nF Fir %sac
t cioet*on Vet XXII Sear N i S. t tuts t nglish
VIEW
lilt H Street Post Office an 7„ ';t""
Greeley. Calnrodu irtM)2-07ty Re.'
Mot (97W 30141%
Fn. (9701 1 o.$-649` Rc►uc+:
URBAN COLLECTOR
Dkvprt: «cld Counts
i F, IIinncnk.unp
FIGURE NO. 7
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X16
Figure 2-8
Urban Arterial
140' R.O.W.
I
40'
52'
Buffer
Varies
Y
1
24'
Shoulder -1 6'
•
11'
I
1
12'
trt+
Travel Lane I Travel Lane
*HMA
2;
?o/
l
Shoulder
4•
a.1 .. ..►'• r��1O���N�p•tl.trt �t..l. r� uo �::1 1s'I
�t,.!!I11 iilli�IfiAIiailw�.II�.tf�lll!.iliw�1ii1�1•��1
ABC
(Class 5)
* HMA
1
Compacted Subgrade
* ABC (Class 6)
INTERIM TYPICAL
CROSS SECTION
I
140' R.O.W.
Buff: r
N
16'-22'
Sidewalk:
Curb/
Buffer
10'
16'
Shoulder/
Multi -Use
24'
Travel Lane Travel Lane
16' - 28'
Raised Median
1
24'
12'
'travel Lane
* HMA
w
12'
Travel Lane
2of
i''iT' -Ife- 111 -Fs= tAi ti ` IT► -_I c'etell e' r= aii.-, . awls_ -t•Il ttr.�ii tiaisi-;:x:-- ,�ri..�'.'w l.:a w. ..
.. u—u—uttll�ll1111=t1=it-tl-lt=li:11--l1=Ii=1i=11=11�1111�11�11�1111 •[ c[ 1[ .. ..—...
I -Il^Il ir= ir'll=nell2M=11=11=n^Ir=n=II=H=II=alr=lr_1l_11=71-1111-n=n=n=lr=it=>Ir=rr=ir_u=ii n7ir-ir�i'tn�n�n-n rr_ir it-,tl
- ...�..�..�./►�ruwl[wpwEl�
16'
Shoulder/
Multi -Use
16' - 22'
Sidewalk/
Curb/
Butler
10' v
NOT TO SCALE
* ABC (Class 6)
ULTIMATE TYPICAL
CROSS SECTION
10' Minimum Sidewalks as Required by Public Works
1
Compacted Subgrade
.6
Notes:
1. * The allowable class and thickness of Hot
Mix Asphalt (HMA) and Aggregate Base
Course (ABC) shall be determined by the
guidelines described in the Pavement
Design Chapter.
2. The foreslopes and backslopes shall be
no steeper than 4:1 with a preference of
6:1 or flatter where it can be accommodated.
3. All sideslopes shall be seeded and mulched.
4. Additional ROW may be required by Public
Works to meet site specific requirements.
5. Signing and striping per approved plan.
Computer File Information
Creation 1M?: 02)1 all a Initials: K11
Last Modification Date: 01/041 12 Initials: k I
WELD COUNTY
PUBLIC WORKS DEPARTMENT
Full Path: T:PBSC'Admin\Proposals\.'Weldc
Draw ill Fik Name:
hlicroea in Vet_ XM Scale N.T.S. Units: English
t l 11 U Mutt Post OfUcu tiox 758
Cowley, Colorado 80632-b7SS
Phone: (970) 304.6496
Fat: (970) 304.6497
Awful ed
Kcmcd:
Revised:
URBAN ARTERIAL
1. cr: \%cld County
iktaikr. K. HInnenkump
FIGURE NO. 8
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X17
CHAPTER 3 SURVEYING
3.1 SURVEY DATA - REQUIRE A SURVEY CONTROL SHEET
The required horizontal datum for surveying in Weld County is North American Datum of 1983, NAD-83.
The required vertical datum is North American Vertical Datum of 1988, NAVD-88.
3.2 STATE PLANE
It is requiredcommended that survey control be tied into a National Geodetic Survey (NGS) monument
for state plane conversion. Please refer to the NGS website for monument information and location.
3.3 MONUMENT BOXES
Monument boxes are available at no charge for surveyors with valid permits who are upgrading aliquot
corners on paved Weld County Roads or placing monumentation for aliquot corners on new paved Weld
County Roads. Please contact Public Works in advance at (970) 400-3750.
3.4 ROAD SAFETY
Appropriate traffic control devices and safety equipment are required when surveying within the County
right-of-way.
For the safety of the traveling public, monument box covers must be replaced, or the holes created must
be backfilled. To minimize damage to the asphalt, concrete collars will be required around newly
installed monument boxes.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 18
CHAPTER 4 ROADWAY DESIGN CRITERIA
4.1 GENERAL
4.1.1 Policy on the Use of Referenced Publications
This chapter summarizes and/or supplements standards that have been prepared by AASHTO. The
County expects and recommends that transportation designers reference the most recent edition of
AASHTO's A Policy on Geometric Design of Highways and Streets as a primary guide when designing
roadways in the County. Designers also are expected to reference CDOT design manuals. However,
AASHTO and CDOT policies represent nationwide and statewide standards, respectively, which do not
always satisfy County conditions. When standards differ, the instructions and guidance in this manual
will govern.
For the design of auxiliary turn lanes, please see Chapter 8 of this document. All traffic control devices
and road striping will be in accordance with the latest version of the MUTCD or as shown in the latest
version of CDOT's M&S Standard Plans.
4.1.2 Typical Plan Set Guidelines
Typical plan sets should include enough detail and documentation to allow successful construction of
the proposed transportation improvements. Plan sets found to be incomplete, or of insufficient quality
to be easily readable by the reviewer(s), will be rejected by the Public Works Department Plan sets will
be produced on 11 -inch x 17 -inch paper and may be submitted electronically. All plan sets will be
prepared by or under the direct supervision of a Professional Engineer licensed in the state of Colorado.
Each sheet will be stamped and signed by the Professional Engineer of record. The following elements
also must be included:
• Cover Sheet. Must include a vicinity map with scale and north arrow, an index of sheets, design
data, the phone number and address of the company and/or engineer responsible for the
drawings, a utility contact list with phone numbers and email addresses, the Utility Notification
Center of Colorado (UNCC) phone number (811), the project title, and the date printed.
• M&S Standards Sheet. Must show which M&S standards from the most recent CDOT M&S
Standard Plans are applicable to the project.
• Typical Section Sheet(s). Must include functional classification of the roadway, rural or urban
classification of the roadway, right-of-way width, lane and shoulder widths, road centerline
(crown) location, typical cross -slope, and pavement structural section elements and thicknesses.
• General Notes. Must include all notes that are applicable to the construction of the project. May
also include notes on pavement design, Best Management Practice (BMP) design, etc.
• Summary of Approximate Quantities and Earthwork Quantities Sheet(s). Must include tables
showing the bid tabulation quantities and breakdowns of all quantities by location.
• Survey Control Sheet(s). Must include the basis of elevation control, basis of bearings, and
project coordinates datum.
• Right -of -Way Plan Sheet(s). Must be included when temporary or permanent easements are
needed or right-of-way will be acquired. Must include scale and north arrow, existing right-of-
way lines, parcel lines and data, ownership information, proposed easement or right-of-way
lines, and existing and proposed improvements.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X19
• Utility Plans Sheet(s). Provide existing (SUE) and proposed utility relocations. Both plan sets
Mmust include scale and north arrow, utility ownerships, utility locations, utility conflicts. The
SUE sheets shall provide the, and _appropriate level of mapping meeting Colorado state
legislative subsurface utility engineering (SUE) requirements. County requires Quality Level B or
better for all utility impacts. The utility plan should also show the location of where utilities are
proposed to relocate.
• Demolition and Removal Sheet(s). Must show existing conditions and include all items that are
to be removed or demolished by the contractor as part of the project.
• Plan and Profile Sheet(s). Must include horizontal and vertical scales and north arrow, location
of right-of-way, location of easements, location of property lines, location of utilities, centerline
stationing, horizontal and vertical curve information, existing and finished road grades, and
design elevations. Separate plan and profiles sheets will be included for each access point,
irrigation structures, and other structures as applicable.
• Intersection Detail Sheet(s). Must include roadway centerline with stationing, north arrow,
horizontal scale (1 inch = 20 feet preferred), proposed and existing contours (1 foot minimum),
grade flow arrows, location of right-of-way, curb type label (if applicable), and critical spot
elevations.
• Grading and Erosion Control Sheet(s). Must include existing and final elevation contours at a
minimum or one -foot contour interval , spot elevations at critical drainage points to facilitate
review and construction, slope/flow arrows and labels, limits of construction disturbance, and
location of permanent erosion control features. If the project requires a Stormwater Permit per
the National Pollutant Discharge Elimination System (NPDES), a detailed stormwater
management plan (SWMP) and landscaping/vegetation plan will be required. (Additional
information can be found in Chapter 6 of this document.)
• Drainage Sheet(s). Must include location and type of all drainage features (e.g., pipes, ditches,
inlets, manholes), details for pond spillways and outlet structures, plan and profile views of all
pipes and culverts (unless new pipes or culverts are replacing existing ones of the same size and
at the same location), location of all existing utilities, utility potholing, identification of utilities
that conflict with new drainage features, and construction details. Labeling is required for any
pond water surface elevations (WSEL), volumes, water quality capture volumes (WQCV), and
elevations. Drainage sheets must correspond to the accepted drainage report.
• Signage and Striping Plan Sheet(s). Must include driving lane and shoulder widths; stationing
locations for striping beginnings, endings, and changes; color and size of striping; striping
material type; stationing location for signs; type and size of signs; and quantities tabulation
tables
• Landscaping Plan Sheet(s). Must include all areas that are to be seeded and/or landscaped. If
trees are to be replaced, they must be shown on this plan subset.
• Phasing Plan Sheet(s). If the project is to be phased, the phasing plans must be included.
• Construction Traffic Control Plan Sheet(s). Must include plan view of all existing roads within
the limits of the detour or within one mile of the project, whichever is larger; type and size of
signs or other traffic control features; locations for all traffic control features; and quantities
tabulation table. These sheets also must show any anticipated detour routes for road closures
during construction.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 20
• Cross Section Sheet(s). Cross sections on 50 -foot interval must include depiction of existing and
final ground elevations, location of existing and proposed right-of-way and easement lines,
utilities, station labeling, and roadway centerline location.
• Stormwater Management Plan. Must determine whether site is located in a Municipal Separate
Storm Sewer System (MS4) area and must be included for temporary and permanent control
measuresconditions. See Chapter 6 of this document for more information.
These guidelines are not intended to replace specific guidelines related to preparation and submission
of plat maps and property description maps prepared by a licensed professional surveyor. These
guidelines also are not inclusive of all the specific items that may be required by the Wele County Public
Works, Planning or Building Departments. There may be additional requirements for more complex
projects, such as bridge replacement and County Highway projects.
Table 4-1 below summarizes the roadway design criteria that can be found in this document for each
roadway classification. For additional details refer to the sections below that discuss each topic.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE I21
Table 4-1 Roadway Design Criteria
Design
Element
Arterial
Collector
Local
Design Speed
Within
Subdivisions
60 mph
50 mph
40 mph
Outside
Subdivisions
See
Note
1
Posted
Speed
Within
Subdivisions
50 mph
40 mph
30 mph
Outside
Subdivisions
See
Note
1
Design Vehicle
WB-67
WB-67
WB-67
Maximum
Superelevation
Rural
6%
6%
6%
Urban
4%
4%
4%
Minimum
Length
Required
Tangent
Between
Curves in Addition
to Superelevation
Transition
100
ft
100 ft
50
ft
Minimum
Intersection
Tangent (Measured
from
Pavement
Edge)
(See
Note
2)
200
150
ft
100
ft
ft
Minimum
Centerline
Radius
See
Note
3
Minimum
K Value
for Vertical
Curves
See
Note
4
Minimum
Stopping
Sight
Distance
See
Note
4
Minimum
Centerline
Grade
on
Road
with
Curb
and Gutter
0.40%
0.40%
0.40%
Maximum
Centerline
Grade
5%
6%
8%
Maximum
Vertical
Grade
Change
Not
Requiring
a Vertical
Curve
≤0.2%
≤0.2%
≤0.2%
Minimum
length
for Vertical
Curves
Preferred:
300
ft
300 ft
300 ft
Allowed
(3 x
Design Speed):
i
180
ft
150
ft
120
ft
Notes:
1. See Section 4.1.3 to determine an appropriate design speed and posted speed limit. Enforceable speed limit for roads
without a posted speed limit is 55 mph.
2. See Figure 4 2Figure 4 2.
3. See AASHTO's A Policy on Geometric Design of Highways and Streets superelevation tables for minimum radii based on
design speed and maximum superelevation.
4. See Table 4-2 Table 4 2 for minimum stopping sight distance and K values for vertical curves.
4.1.3 Design Speed
Weld County requires designers to use a design speed that is 10 miles per hour (mph) above the
required posted speed limit. Any change to the existing posted speed limit on a County road requires
review by the Public Works Department and approval by the BOCC.
To determine an appropriate speed limit, traffic investigations should consider the following factors
applicable to the portion of road being studied:
• Vehicle speed data (85th percentile)
• Crash history
• Hazardous locations (curves, sight distance, etc.)
• Parking practices
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 22
• Roadside development
• Road characteristics
The enforceable speed limit on roads within the County (not including roads within a subdivision) is 55
mph unless posted otherwise or within business districts, residential areas, or other areas where special
conditions require a lower speed limit. Section 42-4-1102 of the Colorado Revised Statutes requires that
speed limits not be higher or lower than the basic prima facie (reasonable and prudent under normal
conditions) speed limit unless a traffic investigation has justified the change.
Posted speed limits for roads within subdivisions shall be as follows:
• 50 mph for arterial roads;
• 40 mph for collector roads;
• 30 - 40 mph for local commercial/industrial uses; and
• 25 — 30 mph for local residential uses.
4.2 HORIZONTAL ALIGNMENT
4.2.1 Horizontal Curves
Horizontal alignment of the roadway is critical for safe and economical operation of motor vehicles
traveling the roadway at the design speed. Horizontal curve design should be based on an appropriate
relationship between design speed, right-of-way, profile grades, and construction costs —and on their
joint relationships with superelevation and side friction. Curves are not required when the deflection
angle (A) (total central angle of the circular curve) is less than 1 degree. Curves should be at least
500 feet long for a deflection angle of 5 degrees, and the minimum length should be increased 100 feet
for each 1 degree decrease increase in the deflection angle. Figure 4-1 illustrates a simple horizontal
curve.
Figure 4-1
Horizontal Curve
Tangent
Point of Curvature (PC)
Point of Intersection (PI)
External Distance (E)
Deflection Angle (A)
Length of Curve (L)
Simple Curve
Point of Tangency (PT)
The formulas can be found in AASHTO's A Policy on Geometric Design of Highways and Streets and
CDOT's M&S Standard Plans. Minimum radius values may also be taken from the AASHTO
superelevation tables, using the "NC" (normal crown) line item. For rural areas, use the AASHTO table
for minimum radii normal crown rates with emax = 6 percent. For urban areas, use the AASHTO table for
minimum radii for normal crown rates with emax = 4 percent.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 23
Designers should use every effort to exceed the minimum curve radius recommended by AASHTO when
practical. Simple curves should be used for all roadways. Broken back, compound, or reverse curves are
not recommended. The tangent between curves should be sufficient to accomplish the superelevation
transitions required for adjacent curves. An additional 50 feet to 100 feet of tangent length, graded as a
normal crown, should be provided between the end of the transition out of one curve and the beginning
transition into the next for ease of driving.
Minimum intersection tangents (measured from the pavement edge of the intersected road at
intersections) shall be as follows: 200 feet for arterial roadways; 150 feet for collector roadways; and
100 feet for local roadways as illustrated in Figure 4-2.
Figure 4-2 Minimum Tangent from Intersection
MINIMUM
TANGENT FROM INTERSECTION
WELD COUNTY ROAD
EDGE OF PAVEMENT
POINT OF CURVATURE (PC)
4
4.2.2 Superelevation
Proper design of horizontal curves often requires the use of superelevation (roadway banking). Factors
controlling the use of superelevation include climate conditions, terrain conditions, classification of the
road, and the frequency of slow -moving vehicles on the roadway. In general, a lower rate of
superelevation is used in urban areas than in rural areas. For rural areas, use the AASHTO table for
minimum radii for design superelevation rates with emax = 6 percent. For urban areas, use the AASHTO
table for minimum radii for design superelevation rates with emax = 4 percent. If possible, superelevation
rates of 4 percent or less should be used in roadway designs.
4.2.3 Transitions
The superelevation transition section consists of the superelevation runoff and tangent runout sections.
The superelevation runoff is the length of roadway needed to accomplish a change in outside lane cross
slope from zero to full superelevation, or vice versa. The tangent runout section is the length of roadway
needed to accomplish a change in outside lane cross slope from normal cross slope rate to zero, or vice
versa. Additional information pertaining to the lengths and use of transitions for simple and spiral curves
can be found in AASHTO's A Policy on Geometric Design of Highways and Streets and CDOT's M&S
Standard Plans. The design should allow for 60 percent of the superelevation transition length to occur
before the horizontal curve starts and after it ends. The remaining 40 percent of the transition occurs
within the horizontal curve. This includes the lengths for all the transitions including normal crown, level
crown, reverse crown and full superelevation.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 24
4.2.4 Cross Slope
Cross slope is necessary to ensure adequate roadway drainage. The paved typical cross sections
(described in Chapter 2 of this document) all show a cross slope of 2 percent, and this is the County's
preferred value for a paved roadway. Non -paved roadways should have a cross slope closer to 3 to 4
percent to help accommodate surface drainage. Undivided roads should have a normal crown that is a
two-way cross slope, with the high point of the cross section located on the road centerline. Divided
roads should have a cross slope on each side of the divide, with the high point of each section located
where the pavement meets the median.
Unusual conditions and transition areas may cause the 2 -percent cross slope requirement to vary. Cross
slopes varying from a minimum of 1 percent to a maximum of 4 percent may be allowed Depending
upon surface type. Intersections of roads with curbs and gutters sometimes require the use of crosspans
for drainage. At these areas, the normal two-way 2 -percent cross slope will transition to a one-way
slope adjacent to the cross pan, with a slope range of 1 percent to 3 percent. For intersections not
requiring cross pans, see Figure 4-3 for the desired cross slope configuration.
Figure 4-3 Intersection Cross Slope Detail
UNCONTROLLED
INTERSECTION
.a1
J NN_•M.Y-�
glad' Saga
1\111‘100:
1
101 111)11111
1liIjr�:::
Maintain positive drainage
from centerpoint of intersection
to all quadrants.
Eliminate crown from all
directions approaching
the intersection.
CONTROLLED
INTERSECTION
l� i t t; t l:rig lei riti
s ? i i r-�,�,�'---� i? •'! 114 l =
1 1 11/1. hit
,441,
epacr••••••rwe:";
Through road retains crown;
side roads with stop/yield signs
are shaped to match the edge
of through road.
The rate of change for cross slope in an area of transition, should not exceed 1.5 inches over a 50 -foot
horizontal distance. This rate helps to ensure ride quality for the traveling public.
4.3 VERTICAL ALIGNMENT
Weld County's topography generally is flat with gentle slopes, but some areas have steep drainage
basins and rolling hills. When designing roadway vertical alignment, designers must consider stopping
sight distance requirements for the given speed limit and the challenges of large cut -and -fill sections.
Vertical curves are classified as either sag or crest curves. Typically, sag curves are control ed by
nighttime driving conditions with headlight visibility restrictions, and crest curves are controlled by
stopping sight distances. Vertical curves should be simple in application and should result in a design
that is safe and comfortable in operation, aesthetically pleasing, and adequate for drainage especially
when a curb and gutter are used.
4.3.1 Maximum and Minimum Grades
Grade lines typically are controlled by topography and structure clearances, but very flat grade can be
controlled by drainage considerations. Other factors that should be considered are road classifications,
design speed, safety, and construction costs.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 25
A minimum grade value of 0.4 percent is preferred for road sections with curbs and gutters. In certain
conditions, a grade as low as 0.3 percent may be used with approval of the Department of Public Works.
The designer must consider the ultimate design of the roadway, however, recognizing if a curb and
gutter may be required in the future, and then design for those conditions during the interim design.
Maximum allowable grades are as identified in Table 4-1Table 4 1 above; 5 percent on arterials, 6
percent on collectors, and 8 percent on local roads. Grades of 4 percent or steeper will require special
consideration for drainage or erosion protection.
When using combinations of horizontal and vertical curves, it is important to recognize the driver's
perspective. Sharp horizontal curvature should not be introduced at or near the top of a pronounced
crest vertical curve. If unavoidable, the horizontal curve should be made longer than the vertical curve
to help minimize the driver's inability to perceive the horizontal change, especially at night. For further
details, see AASHTO's A Policy on Geometric Design of Highways and Streets and CDOT's Roadway
Design Guide.
The length of vertical curves can be determined by dividing the rate of vertical curvature by the grade
change or algebraic difference in intersecting grades (%).
L (Length)(ft) = K (rate of curvature) / A (grade change)(%)
A vertical curve is not required when a grade change or the algebraic difference is ≤ 0.2 percent. The
Weld County preferred minimum length of a vertical curve is 300 feet. The allowed minimum is three
times the roadway design speed.
4.4 SIGHT DISTANCE
At intersections, accesses, and points along County roadways, sight distance is essential to protect the
traveling public. In evaluating the overall performance of a roadway, there are several sight distances to
consider when designing a roadway. When items such as walls, buildings, bridge piers, cut slopes, or
vegetation growth are near the roadway on the inside of a curve, they can block a driver's view of the
road ahead. If they are too close, the driver will not have sufficient distance along the curved roadway to
stop when a hazardous condition comes into view. Sight distance related to accesses is discussed in
Chapter 8 of this document.
4.4.1 Stopping Sight Distance
Stopping sight distance is the length of roadway it takes for a driver to bring a vehicle to a complete
stop. Stopping sight distance is measured from the driver's point of view, which, according to AASHTO's
A Policy on Geometric Design of Highways and Streets, is 3.5 feet above the road surface, to an object's
height of 2 feet within the roadway. Stopping sight distance includes the reaction time of the driver and
braking distance of the vehicle, as well as roadway grades (see Table 4-2). Additional information
regarding reaction time and braking distance can be found in AASHTO's A Policy on Geometric Design of
Highways and Streets and in Chapter 8 of this document.
As shown in Table 4-2, stopping sight distance varies depending on the percent in grade up or down
within the vertical curve. The designer should account for the varying grades within his or her profile
design and select the appropriate values of stopping sight distance.
Table 4-2 lists stopping and passing sight distances for various percent grades up or down.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGL 26
Table 4-2 Stopping and Passing Sight Distances and K Values
Design
Speed
(mph)
Stopping
Sight
Distance (feet)
Passing Sight
Distance
Grade
No
% Down Grade
% Up
Grade
Crest
Sag
Crest Curve
(0)
3
6
9
3
6
9
K
K
(feet)
K
25
155
158
165
173
147
143
140
12
26
450
72
30
200
205
215
227
200
184
179
19
37
500
89
35
250
257
271
287
237
229
222
29
49
550
108
40
305
315
333
354
289
278
269
44
64
600
129
45
360
378
400
427
344
331
320
61
79
700
175
50
425
446
474
507
405
388
375
84
96
800
229
55
495
520
553
593
469
450
433
114
115
90C
289
60
570
598
638
686
538
515
495
151
136
1,000
357
65
645
682
728
785
612
584
561
193
157
1,100
432
For horizontal curves (see Figure 4-4), the sight line is measured along the chord of the carve, while the
stopping sight distance is measured along the centerline of the inside lane around the curve.
Figure 4-4 Horizontal Sight Distance
Sight Distance
Highway CL ,
Line of Sight
Sight Obstruction
HSO = R(1 -cos (28.65S/R)) or
S = R/28.65 acos ((R-HSO)/R)
HSO - Horizontal Sightline Offset
S a Stopping Sight Distance
R - Radius of lane centerline
•
Horizontal sight distance may be restricted by obstacles along the roadway or even by cut slopes
through a hillside. Other normal roadside objects, such as guardrail, concrete barriers, and privacy
fences, should be studied for interference with sight distance.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 27
Vertical sight distance is determined by the geometrics of the curve. Figure 4-5 is an example of the
crest vertical curve.
Figure 4-5 Crest Vertical Curve
2ft"...ere.
sight Distance (S)
(Th Length of Curve (L)
3.5 ft
Sag vertical curves usually are controlled by headlight distance. Under certain conditions, the minimum
stopping sight distance values used for design exceed the length of visible roadway. This is because of
the limitations of vehicle headlights, especially low -beam headlights.
Formulas to determine stopping sight distance on both crest and sag curves can be found in AASHTO's A
Policy on Geometric Design of Highways and Streets.
4.4.2 Passing Sight Distance
Passing sight distance is the length of roadway required for the driver of a vehicle to pass another
vehicle safely and comfortably, without interfering with the speed of an oncoming vehicle traveling at
the design speed if it came into view after the passing maneuver was started. Passing sight distance is
measured from the driver's point of view, which is to be measured at 3.5 feet above the road surface, to
an object's height of 3.5 feet. Typically, passing sight distance will be limited on crest vertical hills. A
significant amount of cut may be required to achieve adequate passing sight distance. Table 4-2 lists
appropriate passing sight distances for various speeds.
4.4.3 Decision Sight Distance
The stopping sight distances shown in Table 4-2 are distances for reasonable and alert drivers to come
to a complete stop. They do not include the time it takes drivers to make a decision when unexpected or
unusual maneuvers are required. Decision sight distances (see Table 4-3) are substantially greater than
stopping sight distances. Locations where these kinds of decisions are required include interchanges,
cluttered or confusing intersections, and short lane drops. (See AASHTO A Policy on Geometric Design of
Highways and Streets for more information.)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 28
Table 4-3 Decision Sight Distance
Decision Sight
Distance
Design Speed
(mph)
Decision Sight
Distance for Avoidance
Maneuver
(ft)
A
B
C
D
E
30 or less
220
490
450
535
620
40
330
690
600
715
825
50
465
910
750
890
1,030
60
610
1,150
990
1,125
1,280
70
780
1,410
1,105
1,275
1,445
Where.
Avoidance Maneuver A = stop on rural road (t = 3.0 seconds) Avoidance Maneuver B = stop on urban road (t = 9.1 seconds)
Avoidance Maneuver C = speed/path/direction change on rural road (t = 10.2 sec to 11.2 sec)
Avoidance Maneuver D = speed/path/direction change on suburban road (t = 12.1 sec to 12.9 sec)
Avoidance Maneuver E = speed/path/direction change on urban road (t = 14.0 sec to 14.5 sec)
4.4.4 Intersection Sight Distance
There are numerous intersections within Weld County; most are controlled, but some are uncontrolled,
which means there is no signing in either direction. Ideally, intersections would have adequate sight
distance in all directions and along approaches to allow drivers to see obstructions or approaching
vehicles. However, many of the County intersections do not have unobstructed views for various
reasons. Utility appurtenances, embankments, vegetation, and privacy fences are just a few examples of
sight restrictions. In these circumstances, and where no traffic control devices are present, the basic rule
of the road is the vehicle on the left is to yield to the vehicle on the right if they arrive at about the same
time. If drivers cannot see due to sight obstructions at the intersection, it is the responsibility of every
driver to slow down and determine if it is safe to continue through the intersection. Additional
information regarding intersection sight distance can be found in AASHTO's A Policy on Geometric
Design of Highways and Streets.
The recommended dimensions of the sight triangles vary with the type of control used at the
intersection because different types of control impose different constraints on drivers ard, therefore,
result in different behavior. AASHTO's A Policy on Geometric Design of Highways and Streets presents
procedures to determined sight distances at intersections for the following types of traff c control:
1. Intersections with no control
2. Intersections with stop control on the minor road
3. Intersections with yield control on the minor road
4. Intersections with traffic signal control
5. Intersections with all -way stop control
6. Left turns from the major road
7. Roundabouts
Figure 4-6 below, illustrates an intersection with stop control on the minor road. For information
regarding the variable definitions and equations used to calculate these distances, see Section 8.6.2 of
this document and AASHTO's A Policy on Geometric Design of Highways and Streets.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 129
Figure 4-6 Departure Sight Triangles at Intersection (Stop Control)
Clear Sight Triangle
Decision Point
O
cr
0
SC
Major Road
al
CD
0
L
O
C
Major Road
i
a
--
b
0.4
Clear Sight Triangle
Decision Point
Departure Sight Triangle for Viewing Traffic Departure Sight Triangle for Viewing Traffic
Approaching the Minor Road from the Left Approaching the Minor Road from the Right
Private accesses need to take into consideration these sight distance requirements just as other
roadways would. More information regarding access sight distance can be found in Chapter 8 of this
document.
4.5 INTERSECTIONS
By definition, an intersection is the location where two or more roadways meet or join together. This
occurs at at -grade crossings, interchanges, or grade separations without ramps. All of the County -owned
intersections in Weld County are at -grade intersections.
Generally, there is more potential for conflict at intersections than on straight sections of roadway, so
intersections usually have higher accident rates. Chapter 9 of AASHTO's A Policy on Geometric Design of
Highways and Streets discusses intersections and provides guidance on design details. Designers also
should refer to CDOT's Roadway Design Guide. The sections below highlight a few key aspects of
intersection design. See also Chapter 2 of this document for typical cross-section drawings.
4.5.1 Alignment and Profile
It is very important for the success and safety of any intersection that it is aligned with the intersecting
roadway. For standard, at -grade, four-way intersections and T -intersections, the roadways should meet
as close to perpendicular as possible. Skewed intersections are difficult for drivers and create unsafe
conditions. The required angle between centerlines of the intersecting roadways is 90 degrees, as shown
in Figure 4-7. Any deviations from 90 degrees will need to be approved by the Department of Public
Works.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 30
Figure 4-7 Typical Intersections
I
I
90 Degrees
I
I'.
Rdwy CL
4— —
90 Degrees 90 Degrees
Four -Way Intersection
I
I
i
RdwyCL
T Intersection
The alignments and grades of the intersecting roadways should permit the maneuvers needed for cars
to pass through the intersection with minimal interference. Alignments should be as stra ght and flat as
practical, and substantial grade changes should be avoided.
All lanes shall be in general alignment through each intersection; however, a maximum 2 -foot shift is
allowed across an intersection without a variance approval by the County Engineer.
The profile grade lines should be adjusted back a distance from the intersection to provice a smooth
transition. It may be desirable to remove the cross slopes coming into the intersection, as steep cross
slopes or grade changes create an undesirable bump at the intersection and may require reconstruction
to correct. Refer back Figure 4-3 for an intersection cross slope detail. A smooth transition is particularly
important at intersections where drivers do not reduce their speed or come to a stop. Designers should
remember that intersections which are currently stop -controlled may not be stop -controlled in the
future.
4.5.2 Corner Radii
Corner radii are another critical aspect of intersection design. Corner radii are selected based on the
turning radii of different design vehicles. Chapter 2 of AASHTO's A Policy on Geometric Design of
Highways and Streets discusses design vehicles and their different turning radii. The four classes of
design vehicles are: passenger cars, buses, trucks, and recreational vehicles. The Weld County design
vehicle is the WB-67 truck.
4.5.3 Approval Requirements
Chapter 9 of AASHTO's A Policy on Geometric Design of Highways and Streets summarizes the minimum
edge of traveled way design for the four classes of design vehicles. Usually, the simplest curves to
construct are the simple curve with taper and the three -centered compound (symmetric) radii. Other
compound curves can be difficult to implement in the field. For intersections on arterial and collector
roadways, designers should consider a minimum radius of 65 feet, following a simple curve with taper
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF 131
radii. This allows larger trucks to make right turns without the rear tires going off the road and without
veering into opposing vehicle paths. An exhibit from AutoTURN software or equivalent roadway design
turning template software must be provided to the County to demonstrate the corner radius is
appropriate.
4.5.4 Auxiliary Lanes
See Chapter 8 of this document for information on auxiliary lanes.
4.6 CUL-DE-SACS
Cul-de-sacs and dead-end roadways are not common in the County but are sometimes found in
subdivision and residential areas. Cul-de-sacs should be designed with a radius large enough to allow a
standard fire truck to use the cul-de-sac to make a u -turn without having to back up. The minimum
outside curb or pavement edge radius allowed for a cul-de-sac is 55feet. The minimum right-of-way
turnaround radius is 65 feet. The maximum cul-de-sac length between intersecting streets (from
centerline to centerline) is 1,500 feet. No more than 20 lots may be served by a permanent cul-de-sac.
The most common design is a circular cul-de-sac with or without a center island. Chapter 5 of A Policy on
Geometric Design of Highways and Streets offers additional design criteria and other types of cul-de-
sacs. The designer must consult the relevant fire protection authority for its minimum criteria as well.
4.7 BRIDGES
This section is not intended to cover bridge design in detail. It covers only general guidelines. More
detailed bridge design information can be found in the latest editions of AASHTO's LRFD Bridge Design
Specifications, the Culverts and Bridges chapter in the USDCM, Volume 2, and CDOT's Drainage Design
Manual and Bridge Design Manual, as updated.
4.7.1 Bridge Hydraulic Capacity
During preliminary design, the designer shall complete a hydrologic and hydraulic analysis of the
waterway to correctly size the opening of a new bridge, coordinating with owners as necessary. Bridges
over canals require less hydrologic analysis than bridges over natural drainage ways. Designers shall
gather and analyze background information, such as past inspection reports, measurable high-water
marks, past maintenance issues, scour, and flood records. The storm design frequency for the different
types of roadways and drainage types is shown in Table 4-4.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 32
Table 4-4 Design Frequencies
Drainage
Type
I
Design Frequency
Multi -Lane Roads
Urban
area
100
-year
Rural
area
100
-year
Two -Lane Roads
Urban
area
100
-year
Rural
area
Qso > 4000 cfs
Qso < 4000 cfs
50 -year
25 -year
Drainage Type
Design Frequency
Bridge
foundation
scour
Q25 requires
scour design
Qso
and
scour
0200 Check
design
Based
Qsoo
Flood
and
Check
on
Q1oo
Q1oo
Qdesign
Flood
Check
requires
if:
Flood
0200
050 requires
scow -
design
Q100
and
In areas that contain the FEMA mapped 100 -year floodplain, designers shall use the 100 -year discharge
in their designs. If a bridge is being constructed in a 100 -year floodplain, all applicable floodplain
regulations and codes apply, including the need to submit a Letter of Map Revision (LOM 1) to FEMA for
review and acceptance and the need to obtain a Floodplain Hazard Permit from the County.
On wide floodplains, structure loss can be prevented by lowering approach embankments to provide
overflow sections that pass unusual floods over the roadway. This may require relief structures to be
constructed to allow minor flooding without upstream ponding. Factors such as traffic delays and
alternative routes should be considered.
Additional and detailed information can be found in CDOT's Drainage Design Manual and CDOT's Bridge
Design Manual.
4.7.2 Freeboard
A minimum clearance, or freeboard, shall be provided between the water surface elevation and the low
girder of the bridge. The freeboard is required to allow for wave action, ice, debris, and u icertainty
during estimation.
The minimum freeboard for a bridge should follow these guidelines:
• For a high -debris stream, freeboard should be 4 feet or more. A "high -debris" stream
designation often will be site -specific and shall be determined through consultation with Public
Works officials and local landowners, as well as through a thorough investigation of the debris
potential in the watershed.
• For low- to moderate -debris streams, the minimum freeboard will be 2 feet.
The water surface elevation at a distance of 50 feet to 100 feet upstream of the face of the bridge will
be the elevation to which the freeboard is added to get the low girder elevation of the bridge as a rough
estimate of maximum backwater.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A G F I 33
4.7.3 Bridge Scour
Increased flow velocities at bridge constrictions often lead to scour of the bridge foundations, which can
cause the potential for collapse of the structure. Localized bridge scour is comprised of contraction
scour and local scour at piers and abutments. These three components are added together to create the
final scour envelope.
Methodologies for estimating scour at bridges can be found in the following FHWA guidelines:
• FHWA, Evaluating Scour at Bridges, Hydraulic Engineering Circular No. 18 (HEC-18), latest edition
• FHWA, Stream Stability at Highway Structures, Hydraulic Engineering Circular No. 20 (HEC-20),
latest edition
Methodologies for designing scour countermeasures at bridges, piers, and abutments can be found in
FHWA's Bridge Scour and Stream Instability Countermeasures: Experience, Selection, and Design
Guidance, Hydraulic Engineering Circular No. 23 (HEC-23), latest edition.
4.7.4 Use of HEC-RAS
It is acceptable to use the U.S. Army Corps of Engineers (USACE) Hydrologic Engineering Center's River
Analysis System (HEC-RAS) to determine the hydraulic characteristics at bridges. Standard modeling
practices accepted by FEMA should be used when performing HEC-RAS modeling.
It is not acceptable to rely on HEC-RAS output for estimating maximum velocities for erosive or
hazardous considerations or local scour in a channel. A more -detailed hydraulic analysis of the specific
cross section, accounting for variable velocities across the channel, is necessary.
4.7.5 Bridge Railing
Bridge railing should be provided along bridge edges to protect both drivers and in applicable situations
pedestrians. Weld County follows CDOT M&S Standards for bridge rail and guardrail design. CDOT's
M&S Standard Plans, as well as the CDOT Bridge Structural Worksheets, identify several different railing
options and configurations that the designer may consider. AASHTO's bridge design documents provide
additional information as well.
4.7.6 Minimum Structural Requirements
Design loadings for bridges shall comply with the latest editions of AASHTO's LRFD Bridge Design
Specifications and CDOT's bridge design publications.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 34
CHAPTER 5 DRAINAGE CRITERIA
5.1 GENERAL
The intent of Weld County's storm drainage criteria WCECC is to protect the health, safety, general
welfare, and economic well-being of the County and residents, while also protecting property and
infrastructure. The drainage characteristics of Weld County vary greatly throughout the 4,000 square
miles of the county. This chapter aims to provide greater detail on the expectations and guidance for
drainage -related portions of a project.
Weld County has adopted the following master drainage plans:
• South 1-25 Corridor Master Drainage Plan, also known as "Godding Hollow and Tri-Town Study"
(adopted in 1999). The South 1-25 "Tri-Town" Master Drainage Plan from 1999 can be found on
the City of Dacono's website.
• Master Drainage Plan for the Area Surrounding Weld County Parkway (adopted in 2016). This
Master Drainage Plan can be found on the County's Parkway webpage.
A map of Weld County's drainage basins is shown in Figure 5-1. A full-sized version is provided in
Appendix A.
This manual refers to both the current and older, archived versions of Urban Drainage and Flood Control
District (UDFCD) Urban Storm Drainage Criteria Manual (USDCM), Volumes 1 through 3. This manual will
explicitly state when to use an older version of the USDCM. UDFCD has rebranded as of 2019 and is now
referred to as the Mile High Flood District (MHFD). The MHFD acronym will be used exclusively
throughout the chapter.
It shall be noted that specifically to drainage, some of these references have provided updated values
and equations in recent years that are in accordance with Full Spectrum detention pond design. Weld
County does not support Full Spectrum design and, as such, when standards differ, the instructions and
guidance in the following Drainage Chapter will govern.
All Storm Drainage Guidance documents provided by the County can be found on the Weld County
Public Works Development Review webpageWeld County Planning and Zoning's Development Review
webpage.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF I 35
Figure 5-1 Weld County Watersheds
•
•
U
•
•
•
urea
tile
Ow
L.
SI\\l
.
_i
-
`
is
•
•
04 •
ti.
p..i.
•
•
o
eau
T
a
►7
T"
1
-al
'r
SAS Pram
•
7i:I
.....„, a
al . .
....
Trwar
.
4
i
_lit,.if
■■
II
1
ifY�
4
�a
jj
Weld
County
�
Drainage
Basin
Map
W
;
s'
r
x
{
r
.I•
too
.
.mss
10
Mal PRISMS eh'
.
�
i•
WSW
fi
MI* twrA *eaMtr•s
eon., ant
...
a
•.......,4
ea
_I
•
it W
Rai
H ••
--^
SSW
I
r
F ��+—
_'
VI
-
`
s _•■■
'�'{a.
t
�.
■�
�sa►wl
•1
QrMra1
QJI al11OItI•d/l'laR
�;
f
M
viiik
f
,
is
.0
OSP • Aare Yaw ,
. _.-C.
_ : 7
s ♦
C oLIORADO
- I
•.
L ,•
Pa fa. Da
y
•
I
Ls
ow• u walls r.+
a
►'1
j
r
f
:"
A tars
j
- - ?-�
P
L I
*
t
se
T
*.
w4. e
i
y�
S0 • a
rw..�aw
sir(
F
rays
•
"4.11
T
S
• . !
■O
a
a..
I.wi Mr 7w
LI
Pr
LOP CIS
..
1,1
Aropto O4p46
r
A
1
t t
t
r
•
a
T•_
..
ran saw w
tic.,4:-•:•.-1-1•2
alliMat
•saes YM
Lt
is
Sp.«
Sara ems
L
•
.p
...
LI'
arw Sea
N
1
f
"
w
•
lIMPICAINS-
•�f•h�w�
•+w s ►.
Si•• i flit .—S- —
t rp.ra as IV OA IPIalIMPif
•
..•:Y- i�h-r iiir
•
.r7-111,
T�-77.....
r mow« �r�A �.+
sows age
5.2 DRAINAGE LAW
is
I.2
I M
•1D
I14
/it
at
M
at
TTr
T sr
• M
rw
Refer to the Drainage Law chapter of the USDCM, Volume 1, for more information on drainage law as it
relates to stormwater runoff and floodplain management.
•
•
•
• The owner of upstream property possesses a natural easement on land downstream for
rty owner may alter
more harm to the downstream -land tha-n fcwrnei'ly• 8+tte-rsweet Farms, Inc. v. Zimbelman, 976
P.2d 326 (Cob. App. 1998).
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 36
�nduit or outlet for the drainage of lands so long as
opacity and cause flooding of adjacent
lands. Ambrosio v. Pearl Mack Construction Co., 351 P.2d 803 (Colo. 1960).
•
D -itch corpo-ratinns that own ditches owe a duty to those property owners through which their
es using ordinary care so as to prevent damage to adjoining
real property. Oliver v. Amity Mut. irrigation Co., 9°4 P.2d 495 (Colo. App. 1999).
•--A "dangerous condition" constitutes an unreason -able risk to the health or safety of the public,
which is known to exist or which in th
mown to
omission of the public
entity in constructing or maintaining such facility. 24-10 103 C.R.S.
• A Colo -a -d -o Registered Professional Engineer is required not only to serve the interests of his or
her employer/client but also is required as his or her primary obligation —to protect the safety,
Rules of The State Board of Licensure for Architects, Professional Engineers, and Professional
Land Surveyors.
53 DRAINAGE POLICY
The drainage policies set forth are intended to provide adequate stormwater management to preserve
and promote the health, safety, general welfare, and economic well-being of the County. Weld County
embraces the basic principles defined in the Drainage Policy chapter of the USDCM, Volume 1.
5.3.1 Submittal Requirements
The Weld County Public Works DepartmentPlanning Services Department is the agency responsible for
reviewing drainage in the development review process. The submittal requirements for each project
(commercial and residential developments, new roadways, new bridges, channel restorations, etc.) will
differ based on the scope and location of the improvements.
The Drainage Report Checklist provided in Appendix B shall serve as a guideline for designers throughout
the entire design and construction process. The Drainage Report Checklist provides a framework of
Weld County's requirements for the drainage report, construction drawings, and operations and
maintenance (O&M) plan. The designer shall include this checklist with the preliminary and final
deliverables for the project.
• The drainage report must fully document all assumptions and methodologies and shall contain
copies of all applicable tables and reference materials in an appendix. A drainage basin map
shall be included showing basin delineations, flow arrows, design points, pond volumes, and any
other information pertinent to the design.
• Grading and drainage plans shall be submitted as a single PDF document, printab e to scale on
11- inch x 17 -inch paper.
• To assist owners with maintenance, an Operations and Maintenance (O&M) plan for stormwater
facilities and associated infrastructure shall be included with the final drainage report. The O&M
plan should include instructions on safe and correct operations, repair and maintenance of all
installed equipment and facilities, and recommended inspection schedules. The O&M plan to be
distributed to any applicable homeowners' associateassociation or business spark association
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 37
(or equivalent). Weld County has adopted CDOT's guidelines for the O&M plan and is provided
in Appendix C.
• Electronic copies of drainage design spreadsheets, models, etc., may be requested for submittal
to Weld County for reviewing purposes. AutoCAD base files (including site layout, roadways,
utilities, survey coordinate system information) and/or GIS shape files shall be included with the
project's final submittal for inclusion into the County's GIS mapping system. Electronic pdf
copies of all calculations relevant to the design of the project shall be included in the drainage
report appendices for review.
• Each plan and report must be prepared by or under the supervision of a professional civil
e ngineer licensed to practice in the State of Colorado. Plan sheets will contain the Engineer's
seal; signed, dated, and sealed per State requirements. Electronic stamps are acceptable.
• The report shall contain the Weld County Drainage Code Certificate of Compliance stating that
the design meets all applicable drainage requirements set forth in this WCECC, with the
e xception of County -approved variances. The Certificate of Compliance is available on the
Department of Public WorksPlanning and Zoning's Development Review webpage. Design
variance request information is to be included on the lower portion of the Certification of
Compliance sheet. The consulting engineer should provide information supporting the variance
request in the form of a drainage memo or letter. Any necessary engineering calculations or
e xplanation should be provided in the submittal.
• The designer/contractor is to provide an as -built survey, when requested, of the constructed
stormwater facilities upon final completion and inspection of the project for acceptance by
Weld County and issuance of any Certificate of Occupancy. An As -Built Drawing Checklist is
included in Appendix D. The survey will be conducted, signed, dated, and sealed by a
Professional Land Surveyor licensed to practice in the State of Colorado. At a minimum, the as -
built drawings shall include:
1. Drawing showing design contours versus as -built contours of constructed pond/site (1 -foot
contour intervals, labeled)
2. Spot elevations at critical drainage design points:
• Pond outlet structure
• Pond emergency spillway, start and end of riprap or other required protection
• Pipe/inlet elevations
• Structure inverts
• Exposed 6groundwater elevation, if applicable
3. Pond design volume (stage -storage tables) versus as -built volumes. The designer/contractor
shall submit a Statement of Compliance signed and stamped by a Colorado Professional
Engineer that verify verifiesand state in writing that the pond as -built volume meets the design
volume requirements.
4. Drawings shall be properly scaled and sized to clearly show the work that was done through
construction. The contractor teshall provide signed and stamped Engineered copies of relevant
plans and details with updates including the following, but not limited to, updated elevations,
dimensions, and pipe sizes.
5. All appurtenances and related features witishall be located horizontally and vertically by the
surveyor.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 38
Due to a project's scope and/or location, special permits may be required. Such permits Additional
submittals may include construction permits, floodplain permits, and environmental permits as deemed
ject scope and location. Requirements for those special permits are dictated
submittals will follow the guidelines set forth by the approving department or agency.
5.3.2 Data Collection
The County uses information and data provided by FEMA, the National Oceanic and Atmospheric
Administration (NOAA), the U.S. Geological Survey (USGS), private consulting engineers, and the
Colorado Water Conservation Board (CWCB). Before commencing design of any drainage project,
designers should collect and evaluate data for the particular watershed area under consideration.
Unless explicitly stated otherwise, Weld County will allow the use of data collection methodologies
other than what is recommended in this WCECC on a case -by -case basis when complete documentation
of all assumptions is provided. Weld County reserves the right to review alternatives and compare with
other commonly used approaches, including those discussed in the USDCM.
5.4 RAINFALL
The designer should use the most appropriate and best available data for the project area in
determining the rainfall quantities. Local rainfall data shall be obtained from NOAA Atlas 14:
Precipitation -Frequency Atlas of the United States, Volume 8 (Atlas 14) unless otherwise approved by the
Department of Public Works, or unless otherwise specified in urbanized jurisdictions and existing master
plans. The use of synthetic rainfall distribution data is not permitted.
5.4.1.1 Intensity Duration Curves for Rational Method
To develop depth -duration curves or intensity -duration curves for the Rational Method of runoff
analysis, the 1 -hour depth(s) obtained from NOAA Atlas 14 can be applied to Equation 5-1 below for the
duration (or durations) of interest:
1 _ 28.5P1
(10+Td)
o.78h Eq. 5.4.1
Where:
• 1= rainfall intensity (inches per hour)
• P1= 1 -hour point rainfall depth (inches)
• Td= storm duration (minutes)
For more details regarding the development of rainfall information, refer to the Rainfall chapter of the
USDCM, Volume 1.
5.5 RUNOFF
For more details regarding the development of runoff information, refer to Chapter 8, Article XI, of the
Weld County Code and the Runoff chapter of the USDCM, Volume 1. The County explicitly uses the 2007
version of the Runoff chapter of USDCM, Volume 1 and, as such, it has been made available on the Weld
County website. Depending on the size and location of a project, there are three allowable stormwater
runoff calculation methods. Table 5-1Table 5 1 below summarizes the allowable methodc logy. When
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 39
designing a site with multiple detention basins in parallel or series, the use of Stormwater Management
Model (SWMM) is required for routing. Weld County does not allow the use of CUHP.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA l 40
Table 5-1 Runoff Coefficient Equations for Weld County/2008 MHFD (HSG-a)
Size of Basin
Allowable
Runoff
Calculation
Method
Less than
5 acres
Rational
Method
required
5 to 160
Acres
Rational
Method
or SWMM
allowable
Greater
than
160
acres
SWMM
is required
5.5.1 The Rational Method
The Rational Method is a simplistic method for determining peak runoff from a proposes development
or road construction project. It should not be used for basins greater than 160 acres. Refer to the Runoff
chapter of the USDCM, Volume 1 provided on the County Website for more information regarding
application of the Rational Method.
The design engineer shall use the Rational Method to perform runoff calculations (for basin sizes under
160 acres). The spreadsheet used to perform runoff calculations, UD-Rationalv1.02, is available for
download on the Department of Public WorksZoing'sZoning's Development Review webpage. This
spreadsheet utilizes the rational method "C -values" from the 2007 design manual (shown in Table 5-3
through Table 5-5 below). The design consultant may use the downloadable spreadsheets or may create
their own based on the information provided in the following portion of this document. The created
spreadsheets must use the older 2007 C -values or they will notto be accepted. A copy of these runoff
coefficients are provided in Appendix E and on the Weld CountyDepartment of Planning and Zoning's
Development Review webpage. The rational formula is as follows:
Q=CxIxA Eq.5.5.1
Where:
Q = peak runoff rate, cfs
C = runoff coefficient, dimensionless
I = rainfall intensity at the time of concentration, in/hr
A = area of the basin, acres
The runoff coefficient, C, represents the effects of infiltration, evaporation, retention, and interception
and is calculated based on the soil type and impervious percentages. Higher impervious percentage
values (roofs, parking lots) mean the area does not readily allow water to infiltrate into the ground,
whereas lower impervious percentage values (parks, green space) mean the area does allow water to
infiltrate into the ground. The recommended impervious percentage values, I, for Weld County are
provided in Table 5-2, below.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 41
Table 5-2 Percentage Impervious Values for Weld County
Land
Use or Surface
Characteristics
Percent Impervious
(%)
Commercial
95
Residential:
Single
-Family
Greater than
2.5 acres or larger
12
Greater
than 0.75 acre to 2.5 acres
20
Greater than
0.25 acre to 0.75 acre
30
0.25 acre or smaller
45
Multi
-Unit
Detached
60
Multi
-Unit
Attached
75
Apartments
80
Industrial:
Light
80
Heavy
90
Solar
Facilities:
A & B Soils
2
C &
D Soils
25Site-specific
Parks,
Cemeteries
10
Playgrounds
25
Schools
55
Railroad
Yard
Areas
50
Roofs
90
Undeveloped
Areas:
Historic
Flow
Analysis
2
Greenbelts,
Agricultural
2
Streets:
Paved
100
Packed
Cleared,
Roads/Parking/Storage)
Gravel
Earthen
(Includes
Areas
typically
Road
Base and
used
Compacted,
for
40
Recycled
Asphalt
Pavement
75
Drives and
Walks
90
Table 5-3 through Table 5-5 use the impervious percent value (expressed as a decimal) to calculate the
runoff coefficients for Natural Resources Conservation Service (NRCS) hydrologic soil groups A, B, and
C/D for various storm return periods.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 42
Table 5-3 Runoff Coefficient Equations for Weld County/2007 MHFD (HSG-A)
Hydrologic Soil Group A
Equation
5 -Year
10 -Year 100 -Year
Cs = (-0.08i + 0.09) +
(1.31i3- 1.4412 + 1.135i
- 0.12)
Clo=(-0.14i+0.17)+
(1.31i3 - 1.4412 + 1.135i
- 0.12)
Coo = (-0.251 + 0.32) +
(1.31i3- 1.44i2 + 1.135i
- 0.12)
2% 0.00
0.07 0.22
5% 0.02
0.10 0.24
10% 0.06
0.14 0.28
15% 0.10
0.17 0.30
20% 0.13
0.20 0.33
25% 0.16
0.23 0.35
30% 0.19
0.25 0.37
35% 0.22
0.28 0.39
40% 0.25
0.30 0.41
45% 0.27
0.33 0.43
50% 0.30
0.35 0.45
55%
0.33
0.38 0.47
60% 0.37
0.41 0.50
65% 0.41
0.45 0.53
70% 0.45
0.49 0.56
75% 0.50
0.54 0.61
80% 0.56
0.60 0.66
85% 0.63
0.66 0.72
90% 0.71
0.73 0.79
95% 0.80
0.82 0.86
100% 0.90
0.92 0.96
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 43
Table 5-4 Runoff Coefficient Equations for Weld County/2007 MHFD (HSG-B)
Equation
Hydrologic
Soil
Group
B
5 -Year
10 -Year
100
-Year
Cs = (Ca + Ccd)/
2
Clo = (Ca + Ccd)/
2
Cioo = (Ca + Ccd)/
2
2%
0.08
0.17
036
5%
0.10
0.19
0.38
10%
0.14
0.22
0.40
15%
0.17
0.25
0.42
20%
0.20
0.27
0.44
25%
0.22
0.30
0.46
30%
0.25
0.32
0.47
35%
0.27
0.34
0.48
40%
0.30
0.36
0.50
45%
0.32
0.38
0.51
50%
0.35
0.40
0.52
55%
0.38
0.43
0.54
60%
0.41
0.46
0.56
65%
0.45
0.49
0.59
70%
0.49
0.53
0.62
75%
0.54
0.58
0.66
80%
0.59
0.63
0.70
85%
0.66
0.69
0.75
90%
0.73
0.75
0.81
95%
0.81
0.83
0.88
100%
0.90
0.92
0.96
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 44
Table 5-5
Runoff Coefficient Equations for Weld County/2007 MHFD (HSG C/D)
Equation
Hydrologic
Soil
Group
C/D
5 -Year
10
-Year
100
-Year
Cs
=
(0.858i3
(-0.10i + 0.11)
- 0.786i2
0.774i + 0.04)
+
+
C10
(0.858i3
=
0.774i
(-0.18i + 0.21)
- 0.78612+
+ 0.04)
+
Coo
(0.858i3-
=
0.774i
(-0.39i + 0.46)
0.78612
+ 0.04)
+
+
2%
0.16
0.26
0.51
5%
0.18
0.28
0.52
10%
0.21
0.30
0.53
15%
0.24
0.32
0.54
20%
0.26
0.34
0.55
25%
0.28
0.36
0.56
30%
0.30
0.38
0.57
35%
0.33
0.40
0.57
40%
0.35
0.42
0.58
45%
0.37
0.44
0.59
50%
0.40
0.46
0.60
55%
0.43
0.48
0.62
60%
0.46
0.51
0.63
65%
0.49
0.54
0.65
70%
0.53
0.57
0.68
75%
0.58
0.62
0.71
80%
0.63
0.66
0.74
85%
0.68
0.71
0.79
90%
0.75
0.77
0.83
95%
0.82
0.84
0.89
100%
0.90
0.92
0.96
5.5.1.1 Time of Concentration
The time of concentration is calculated based on the length, slope, and cover in the basin. The time of
concentration is calculated by adding the initial or overland flow time and the channelized travel time.
Where:
tc = ti tt
tc = Time of concentration, minutes
t; = Initial or overland flow time, minutes
tt = Channelized travel time, minutes
5.5.1.2 Initial or Overland Flow Time
The initial or overland flow time will be calculated as follows:
Eq. 5.5.1.1
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 45
Where:
t
i
0.395(1.1-05) JL1
50.33
O
Eq. 5.5.1.2
L,= Length of overland flow, ft (500 ft maximum for non -urbanizing undeveloped areas, 300 ft
maximum for urbanizing or developed areas)
SO= Overland basin slope, ft/ft
5.5.1.3 Channelized Flow Time
The channelized flow time (travel time) will be calculated as follows:
Where:
tt
Lt Lt
60K JSo 60V
Lt = Waterway length, ft
SO= Waterway slope, ft/ft
K= NRCS Conveyance Factor (see Table 5-6)
V= Travel time velocity, ft/s
Table 5-6 NRCS Conveyance Factor, K
Type
of
Land
Surface
NRCS Conveyance Factor
Tillage/Field
5
Short
pasture and
lawns
7
Nearly
bare ground
10
Grassed waterway
15
Paved
areas and
shallow
paved
swales
20
5.5.1.4 Urban Check
Eq. 5.5.1.3
For developed and urbanizing basins, the maximum time of concentration shall not exceed the time of
concentration calculated by the urban check equation as follows:
Where:
t = Lt + 10
180
Lt= Waterway length, ft
Eq. 5.5.1.4
The minimum time of concentration for urbanizing areas is 5 minutes and the minimum time of
concentration for non -urbanizing areas is 10 minutes.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 46
5.5.2 Larger Basin Rainfall Methods
Based on Table 5-1, areas larger than 160 acres require use of the SWMM, developed by the
Environmental Protection Agency (EPA). The designer should use the most up-to-date version of
SWMM.
Any supporting modeling data should be included in the drainage report appendices, so that review staff
can adequately review the model. Supporting documentation should include basin information,
infiltration method used (with supporting coefficients, curve numbers, soil types), rainfall data, stage -
storage curves for ponds and any other pertinent information for the model. Electronic submittals of
the SWMM model are required with each submittal package for review by County staff.
5,6 ROADS, INLETS, AND STORM DRAINS
Stormwater collection and conveyance systems (roads, inlets, and storm drains) for new developments
shall be designed to convey the 100 -year storm event to the proposed detention/retention pond. Street
flooding may occur, in which case traffic is disrupted as the street functions as an open channel (see
Section 5.8). In these cases, the design engineer shall ensure that any flooding or surcharge of the
system shall maintain public safety, minimize flood damages, and allow for emergency vehicle access as
required by the local agency.
Sizing of inlets, pipe systems, culverts or other drainage collection systems on private development sites
should be designed to safely convey flows through the site, in a manner that will protect the site's users
from harm and will not cause damage to on -site structures. The design engineer for the project shall
provide calculations for pipe sizes, overtopping of roads, ditches, etc., such that the County's review
engineers can verify that the drainage on -site is safe for users. The County reserves the right to
comment on private drainage systems that they see as being unsafe or inadequate for the intended site
use. The 100 -year developed flows must be transported safely to the site's detention pond for a
controlled release.
For information regarding the design of stormwater collection and conveyance systems, refer to Chapter
8, Article XI, of the Weld County Code and the Streets, Inlets, and Storm Drains chapter of the USDCM,
Volume 1.
5.6.1 Applicable Software
It is acceptable to use HydroFLOW, CivilStorm, HY-8, FlowMaster, and StormCAD softwares to determine
the hydraulic characteristics of storm networks/culverts. Inlet spread calculations and street capacities
with curb and gutter to be analyzed using newest version available of MHFD's UD-Inlet spreadsheets
provided on their website. Alternative modeling software may be used upon approval by the
Department of Public Works.
5.6.2 Roadway Drainage
Roadway classifications in Weld County are described in Section 2.1 of this WCECC and include freeways
(interstates), county highways, arterials, collectors, local roads, and privately maintained roads. For
collector roads, local roads, and privately maintained roads, the maximum encroachment depth over
the roadway crown is 6 inches during the 10 -year storm and 18 inches during the 100 -year storm.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 47
Allowable roadway overtopping for interstates, county highways, and arterials shall be determined by
the Public Works Director or Designee.
5.6.3 Inlets
The design guidelines provided in the Streets, Inlets, and Storm Drains chapter of the USDCM, Volume 1
should be used when designing stormwater inlets. In general, the allowable road capacity and maximum
encroachment depth shall dictate the placement of inlets. Inlets should be placed at low points (sumps),
median breaks, intersections, super -elevation transitions, and before cross walks and bridges, as
required. The standard inlets permitted for use in Weld County streets and roads are shown in Table
5-7. Weld County has adopted CDOT (Type C, Type D, Type R and Type 13) and Greeley (Combination
Type 3) Inlet detail, with modifications as provided in details sheets. See Appendix J. Note: Inlet Types C
and D will require close mesh grates as directed by Weld County.
Table 5-7 Inlets for Weld County
Inlet
Type
Permitted
Use
Curb
Opening
Inlet
Type
R
All
street
types
with
6 -inch
vertical
curb
Grated Inlet
Type
C,
D
Roadside
ditches
or swales
Grated
Inlet
Type
13
Alleys
or
private
drives
with
a valley
gutter
Inlet
Type
3
All
street
types
with
6 -inch
vertical
curb
Combination
Various factors, such as debris clogging, pavement overlaying, and variations in design assumptions can
decrease the capacity of inlets. To account for these factors, Weld County recommends that the
theoretical capacity calculated for inlets be reduced by the factors presented in Table 5-8.
Table 5-8 Theoretical Capacity of Inlets for Weld County
Condition
Inlet
Type
Percent of Theoretical
Capacity
Allowed
Sump
or continuous grade
Curb
Opening
Type
R (5 -ft
Length)
2
88
Curb
Opening
Type
R (10
-ft
Length)
2
92
Curb
Opening
Type
R (15 -ft
Length)
2
95
Continuous
grade
Inlet
Type
3
66
Combination
Sump
'Grated
Inlet
Type
C or
D2
50
Grated
Inlet
Type
132
50
Combination
Inlet
Type
3
65
1 Type C and D inlets shall not be placed in roadways
2 CDOT Standards, with modifications
5.6.4 Pipes
The design guidelines provided in the Streets, Inlets, and Storm Drains chapter of the USDCM, Volume 1
should be used when designing stormwater pipes. Pipe networks shall be sized to convey the 10 -year
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 48
storm event while flowing at 80 percent of the full pipe capacity. In the 100 -year event, the hydraulic
grade line (HGL) shall be kept at least one foot below manhole lids, inlet grates, and inlet curb openings.
The calculated HGL for both the minor and major storm events shall be provided on all p -oposed final
storm profile views. The minimum flow velocity (for both storm events) shall be 3 ft/s to minimize
sediment deposition. Maximum flow velocity (for both storm events) shall not exceed 18 ft/s to
minimize scour at the outlet. Erosion protection at the pipe outlet is required for all velocities greater
than or equal to 3 ft/s. Riprap should be used at pipe outlets and have a minimum D50 of 9 inches (Type
L)
The minimum allowable size for a storm sewer within a public right-of-way or public drai iage easement
shall be 15 inches in diameter or equivalent. The Department of Public Works should be contacted to
determine which types of storm sewer pipes are permissible for use in public rights of way or public
drainage easements. Pipes constructed under the travel lanes of a new public roadway shall be
reinforced concrete pipe (RCP), Class 3 strength or greater, depending on traffic loading, or an approved
equivalent. All RCPs shall have a minimum cover of 12 inches above the pipe crown and tell to the
bottom of pavement section (asphalt or concrete) at the edge of the roadway. A minimum of 12 inches
of cover above the pipe crown to the top of the finished grade is required for gravel roads. If 12 inches
of cover is not possible, the pipe material must be rated for a minimum of HS -20 loading Jr the largest
expected loads crossing it (i.e., oil rigs, semi -trucks, etc.). The contractor must provide sh Dp drawings for
any precast concrete box culvert (CBC) to be approved for use by the engineer.
The Manning's roughness coefficient "n" for all storm sewer capacity calculations in Welc County shall
be 0.013 regardless of pipe material (e.g., concrete, polyvinyl chloride [PVC], or high -density
polyethylene [HDPE])—with the exception of aluminized corrugated metal pipe (CMP), which shall have
a coefficient of 0.025. However, the designer should take note that only RCP and CMP are allowed in
public ROW due to ditch burning. Any other pipe material used shall only be placed outside of public
ROW, or upon approval by the Department of Public Works.
5.6.5 Manholes
Manholes shall be provided to allow for inspection and maintenance of stormwater systems. At a
minimum, manholes shall be placed at all pipe junctions, changes in pipe size or material, and changes in
grade and alignment. For long straight runs of pipe, the distance between manholes shall be limited to
400 feet (for pipe diameters < 42 inches) and 500 feet (for pipe diameters ≥ 42 inches). Manhole lids
shall not be located within the vehicle wheel path.
Table 5-9 Manhole Sizes
Storm Pipe
Diameter
(inches)
Manhole
Diameter
(ft)
15
inches
to 18
inches
4
ft
21
inches
to 30 inches
5
ft
36 inches
to 54 inches
6
ft
60 inches
+
CDOT
Standard
M-604-20
It shall be noted that the designer should review the incoming and outcoming pipe angles to ensure that
the manhole diameter can accommodate the pipe skew, when the pipe sewer alignment is not straight
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X49
through, or when more than one sewer line goes through the manhole. Steps shall be provided to allow
safe access into the manhole. Manhole details are provided in Appendix J
5.7 OPEN CHANNELS, ROADSIDE DITCHES, AND GRASS SWALES
It is important to distinguish the difference between channels, ditches, and swales. Open channels and
grass swales often are existing drainage conveyances that either carry large offsite flows around a site or
carry onsite flows to a detention pond on -site. County -owned roadside ditches are common along rural
roads and provide runoff conveyance for the County's roadway infrastructure. Irrigation ditches are not
considered to fall under any of these definitions and shall be treated as separate infrastructure
altogether.
Open channels, grass swales, storm pipe systems, and culverts located on new development sites need
to ensure runoff from the developed site for the 100 -year storm event can safely reach the on -site
detention pond with adequate capacity and freeboard. This can be a combination of overland flow,
pipes, or swales to get the runoff to the pond, without it leaving the site. The design engineer needs to
provide calculations to show that the 100 -year developed flows make it to the pond without
overtopping or exceeding the capacity of the proposed drainage system. Any off -site flows that are
planned to be routed around the developed site must be designed using a 100 -year runoff value, so that
no unplanned flows enter the proposed site that were not planned for in the detention pond's spillway
calculations.
Roadway ditches that are designed by consultants for the County (for County -owned and maintained
roadways only) may use a developed runoff from the 10 -year, 1 -hour storm event in their ditch designs.
For more information regarding the design of open channels, refer to Chapter 8, Article XI, of the Weld
County Code and the Open Channels chapter of the USDCM, Volume 1. Information regarding the design
of roadside ditches is provided in the Streets, Inlets, and Storm Drains chapter of the USDCM, Volume 1.
If grass swales are used, they shall be designed in accordance with the Grass Swales Fact Sheet (T-2) of
the USDCM, Volume 3.
5.7.1 Applicable Software
The design of open channels, grass swales, and roadside ditches is to be completed in FlowMaster or
Hydraflow Express Extension for Autodesk software. Channels, swales, and roadside ditches will be
designed to account for any erosive or hazard conditions.
It is acceptable to use USACE's HEC-RAS software to determine the hydraulic characteristics of large
open channels. HEC-RAS modeling shall be performed to align with standard modeling practices
accepted by FEMA.
It is the designer's responsibility to effectively model erosive, hazard, or local scour in a channel for
estimating maximum velocities. The designer shall create a model that adequately places the correct
number of cross sections in the necessary locations to accurately make an evaluation of velocities
throughout the channel to determine its erosive and scour potential.
5.7.2 Open Channels and Swales
Generally, channels and swales should be designed as a trapezoidal shape with a minimum two -foot
bottom width and side slopes no steeper than 4:1. If, however, steeper slopes are required due to site
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 50
constraints, the design engineer should address how the channels will be maintained, since it may not
be safe to mow on slopes that are greater than 4:1. The design engineer also should consider the
appropriate seed mix and seeding application method when determining side slopes. More information
on seed mixes and revegetation can be found in Chapter 6 of this WCECC.
Open channels and swales shall be designed to allow the 100 -year design flow plus a minimum of one
foot of freeboard. However, channels conveying less than 20 cfs may reduce the minimum one -foot
freeboard requirement to the freeboard required to convey 1.33 times the 100 -year design flow. The
reduced freeboard may only occur if a one -foot minimum freeboard is not physically possible and
calculations are submitted.
Hydraulic structures (check/drop structures, bridges, transitions, constrictions, bends, ccnfluences,
rundowns) associated with open channels shall be designed for the 100 -year storm event. For more
information regarding the design of hydraulic structures, refer to Chapter 8, Article XI, of the Weld
County Code, the most recent version of Hydraulic Structures chapter of the USDCM, Volume 2, and
Chapter 4.7 - Bridges of this WCECC.
MHFD has published guidelines for typical Manning's n values and other design criteria for "V" and
trapezoidal swales. Table 5-10 through Table 5-12 and Figure 5-2 and Figure 5-3 below provide guidance
for channel design.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A C � 51
Table 5-10 Roughness Coefficients ("n") for Channel Design (After Chow 1959)
Channel
Type
Roughness Coefficients
(n)
Minimum
Typical
Maximum
I.
Excavated
1.
Earth,
or
straight
Dredged
and
uniform
a. Gravel,
uniform
section,
clean
0.022
0.025
0.030
b. With
short
grass,
few weeds
0.022
0.027
0.033
2.
Earth,
winding,
and
sluggish
a. Grass, some weeds
0.025
0.030
0.033
b.
Dense weeds
or aquatic
plants
0.030
0.035
0.040
c. Earthy
bottom
and
rubble/riprap
sides
0.028
0.030
0.035
3. Channels
not
maintained,
weeds
and
brush
uncut
a.
Dense weeds,
high
as
flow
depth
0.050
0.080
0.120
b. Clean
bottom,
brush
on sides
0.040
0.050
0.080
II.
Natural
streams (top
width
at
flood
stage 100
ft)
1. Streams on
plain
a. Clean,
straight,
full
stage,
no rifts
or deep
pools
0.025
0.030
0.033
Clean,
winding,
some
pools
and
shoals,
some
0.035
0.045
0.050
b. weeds
and
stones
Very weedy
reaches,
deep
pools,
or
floodways
0.075
0.100
0.150
c. with
heavy stand
of
timber
and
underbrush
III.
Lined
or
Built
-Up
Channels
1. Concrete
a.
Trowel/float
finish
0.011
0.015
0.016
b. Shotcrete
0.016
0.020
0.025
2. Gravel
bottom
with
sides
of:
a.
Formed
concrete
0.017
0.020
0.025
b.
Random
stone in mortar
0.020
0.023
0.026
c. Dry rubble
or riprap
0.023
0.033
0.036
3. Wetland
Bottom
Channels
See
Figure 5-2
4. Grass -Lined
Channels
and
Swales
See Figure 5-3
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 52
Figure 5-2 Manning's n vs. Depth for Low -Flow Section in a Composite Channel
Manning's n Value
070
065
060
055
050
045
040
035
030
a- n=0.0001(Y')-0.0025(Y)+0.050
0.0206(
Y) + 0 099
-
2 3 4 5 6 7 8 9 10
Depth of Flow Y, in Feet
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 53
Figure 5-3 Manning's n vs. VR for Two-Retardances in Grass -Lines Channels
MANNING'S n
02 03 04 0506 06 10 2 3 4 5 6 8 10 20 30
VR, PRODUCTOF VELOCITYAND HYDRAULIC RADIUS
From "Handbook of Channel Design For Soil
and Water Conservation. U S Department of
Agriculture. Soils Conservation Service. No
SCS-TP-61 March. 1947. Rev June. 1954
Table 5-11 Trapezoidal Channel Design Guidance/Criteria
Design Item
Criteria for Various Types of Channel lining
Grass: Erosive Soils
Grass: Erosion Resistant Soils
Riprap
Concrete
Maximum 100-yr Velocity
3.0 ft/sec
5.0 ft/sec
12.0 ft/sec
18.0 ft/sec
Minimum Manning's n -
capacity check
0.030
0.030
0.030
0.011
Maximum Manning's n -
capacity check
0.035
0.035
0.040
0.013
Maximum Froude Number
0.5
0.8
0.8
n/a
Maximum side slope
4H:1V
4H:1V
2.5H:1V
1.5H:1V
Minimum centerline radius for
a bend
2 x top width
2 x top width
.
2 x top width
2 x top width
Minimum freeboard
1.0 ft
2.0 ft
1.0 ft
1.0 ft
5.7.3 Roadside Ditches
The designer shall design flexible ditch linings based on FHWA's Design of Roadside Channels with
Flexible Linings, Hydraulic Engineering Circular No. 15 (HEC-15) guidelines and should coordinate with
the Department of Public Works for approval of the chosen lining. Riprap-lined ditches shall have a
minimum D50 of 9 inches (Type L).
Roadside ditches shall be designed to maintain a minimum of one foot of freeboard during the 10 -year
storm event. Design criteria, provided in the previous Open Channels and Swales section, should be used
in the design of roadside ditches as well.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 54
5.8 CULVERTS
Culverts are structures that convey flow through embankments such as roadways and railroads and
should not be confused with storm drainage systems. If a project uses culverts in any facet and connects
to County facilities, then the culvert and associated facilities must convey the 100 -year storm event
flow. A culvert is required for every new access point or supporting documentation must be provided to
the County to show that a culvert is not needed. For more information regarding the design of culverts,
refer to Chapter 8, Article III, Article XI, and Appendix 8-B of the Weld County Code and the Culverts and
Bridges chapter of the USDCM, Volume 2. See also the latest edition of AASHTO's Roadside Design
Guide.
5.8.1 Applicable Software
It is acceptable to use FHWA's HY-8 or CulvertMaster culvert analysis software to determine the
hydraulic characteristics of culverts. Alternative modeling software may be used upon approval by the
Department of Public Works.
5.8.2 Sizing
Culverts shall be sized such that any roadway overtopping meets allowable street capacity and
maximum encroachment depth requirements. The minimum allowable size for a culvert within a public
right-of-way or public drainage easement shall be 15 inches in diameter or equivalent. Weld County may
require additional culvert capacity to prevent flooding and backwater effects on adjacent properties.
The storm drainage system for a developed site, via culverts, inlets, swales, pipe systems, must provide
adequate capacity to safely convey the 100 -year developed runoff to the site's detention/retention
pond without leaving the site. If the culvert/pipe system is undersized and results in floocing, the
flooding must be contained onsite. It should be shown that on -site flooding does not impact permanent
structures or buildings on -site. Developed runoff from the site may not adversely impact adjacent or
downstream properties.
The maximum overtopping of local or collector County roads during the 10 -year storm event is 6 inches
and 18 inches in the 100 -year event. However, the County prefers to minimize overtopping to the
greatest extent possible. Allowable roadway overtopping for county highways and arterials shall be
determined by the Public Works Director or Designee. Private culverts/swales within developments
must be sized to provide adequate capacity to carry runoff from the 100 -year event safely to the
proposed detention/retention pond.
Additionally, culverts must be sized to meet the maximum headwater to depth ratios (HW/D) listed in
Table 5-12.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 55
Table 5-12 Maximum HW/D Requirements for Weld County
Range of
Diameter or
Height
or
Rise
(Inches)
Maximum
HW/D
Less than
36 inches
2.0
36 inches
to 60 inches
1.7
Larger than
60 inches
but
less
than
84 inches
1.5
84 inches
to less
than
120
inches
1.2
120
inches
or larger
1.0
Culverts shall be installed to the minimum slope required to achieve a minimum flow velocity of 3 ft/s to
minimize sediment deposition within the pipe. The slope should be checked for each design, and if the
proper minimum velocity is not obtained, other design options should be evaluated. Maximum velocity
at the culvert exit should be consistent with the velocity in the channel to which it discharges so as to
reduce the risk of scouring at the culvert outlet. Energy dissipators may be required and shall be
designed per the most recent version of Hydraulic Structures chapter of the USDCM, Volume 2, and the
guidelines in the FHWA Hydraulic Design of Energy Dissipators for Culverts and Channels, Hydraulic
Engineering Circular No. 14 (HEC-14).
5.8.3 Materials
Weld County allows the installation and use of commonly available culvert types such as RCP and
aluminized CMP within the public right-of-way. Weld County will allow the use of other culvert types on
a case -by -case basis when complete documentation of all culvert specifications is provided. It should be
n oted that pipe materials that do not withstand high temperatures (burning of roadside ditches), should
n ot be used within the County ROW.
5.8.4 Cover
All culverts must be installed with a minimum of 12 inches of cover above the pipe crown and bell to the
bottom of asphalt at the edge of pavement (for paved roads) and a minimum of 12 inches of cover
above the pipe crown to the top of the finished grade (for gravel roads). If 12 inches of cover is not
possible, the culvert material must be rated for a minimum of HS -20 loading or the largest expected
loads crossing it (i.e., oil rigs, semi -trucks, etc.).
5.8.5 End Sections and Safety Grate
At a minimum, culverts installed in public rights -of -way must be equipped with a flared end section or
headwalls on the culvert entrance and outlet, as directed by Public Works. Cutoff walls below the outlet
e nd section shall be 4,500 psi concrete with epoxy coated #5 rebar 12" on center each way, three inches
clear from all earthen edges, 8" wide x 3' deep and 2' beyond each outside edge of the end section.
There may be situations in which other types of culvert inlets are necessary. In those situations, the
design methodologies outlined in the Culverts and Bridges chapter of the USDCM, Volume 2 should be
u sed.
Safety grates are strongly recommended at culvert entrances to prevent people, animals, and large
debris from inadvertently entering a culvert. Safety grates shall not be placed at the outlet of culverts or
storm drains. The following conditions may require use of a safety grate:
• It is not possible to see daylight from one end of the culvert to the other.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 56
• The culvert is less than 42 inches in diameter.
• Conditions within the culvert (bends, obstructions, vertical drops) or at the outlet are likely to
trap or injure a person.
Exceptions to the above criteria consist of street curb -opening inlets and driveway culverts that are
subject to ponding depths no greater than 12 inches at the flowline and culvert entrances that are made
inaccessible to the public by fencing.
Sound engineering judgement should be used to determine the need for a safety grate while also
considering hydraulic forces and clogging potential. Undersized or poorly designed grates can become
clogged during heavy runoff and the culvert may be rendered ineffective. Additionally, the surrounding
site features and depth and velocity of flow may increase the risk of pinning a human or animal against
the grate. To minimize these hazards, safety grates should be sized according to the Outlet Structures
Fact Sheet (T-12) of the USDCM, Volume 3 and designed to meet the following criteria:
• Grates should be inclined at a slope no steeper than 3:1 (flatter is better) and have a clear
opening at the bottom of no more than 9 inches to permit passage of debris and bed load at
lower flows.
• Weld County does not allow the use of collapsible gratings.
5.8.6 Maintenance
The County will maintain culverts located within the County ROW. Private property owners are
responsible for maintenance of their culverts. Culverts that are part of a subdivision drainage plan are
maintained by the respective homeowner's association. Those culverts should be maintained and
cleaned out on an as -needed basis to ensure proper drainage of the subdivision. Safety grates should be
inspected and cleaned after every large storm event (at a minimum) to ensure that the systems remain
effective and that clogging and pinning risks are minimized.
5.9 RIPRAP
Riprap should be included on the downstream end of culverts and pipe systems to provide erosion
protection. The following direction should be used when designing riprap aprons at the outlet of
culverts and pipe systems. Mirafi FW-300 or approved equivalent shall be installed under all riprap.
5.9.1.1 Configuration of Riprap Apron
Figure 5-4 illustrates typical riprap protection of culverts outlets.
5.9.1.2 Extent of Protection
The length of the riprap protection downstream from the outlet depends on the degree of protection
desired. If it is necessary to prevent all erosion, the riprap must extend until the velocity decreases to an
acceptable value. The acceptable major event velocity is set at 3 ft/sec for non -cohesive soils and at 5
ft/sec for erosion resistant soils. The rate at which the velocity of a jet from a conduit outlet decreases is
not well known. The procedure recommended here assumes the rate of decrease in velocity is related to
the angle of lateral expansion, 0, of the jet. The velocity is related to the expansion factor, 1
2tan0
which can be determined directly using Figure 5-5Figure 5 5 or Figure 5-6Figure S fi by assuming the
expanding jet has a rectangular shape:
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 57
Where:
and:
Where:
LP
k2tan0) tan (At
\Yt
w)
Lp = Length of protection (ft)
W = Width of the conduit (ft, use diameter for circular conduits)
Yt = Tailwater depth (ft)
0 = The expansion angle of the culvert flow
A
t
Q
V
At = required area of flow at allowable velocity (ft2)
V = the allowable non -eroding velocity in the downstream channel (ft/sec)
Q = design discharge (cfs)
For Eq. 5.9.1:
Eq. 5.9.1
Eq. 5.9.2
• If the tailwater elevation is unknown or unable to be calculated, a value of 0.4 x the culvert
height or pipe diameter may be used for Vt.
1
• The expansion factor can be found from Figure 5-5 and Figure 5-6 shown below, after
2tan 0
calculating Q/D2.5.
• In the calculations for At, the allowable non -eroding velocity in the downstream channel should
be:
o 3.0 ft/sec for erosive soils
o 5.0 ft/sec for non -erosive soils
In certain circumstances, Eq. 5.9.1 may yield unreasonable results: Therefore, in no case should Lp be
less than 3H or 3D, nor does Lp need to be greater than 10H or 10D whenever the Froude parameter,
Q/WH15 or Q/D2 5, is less than 8.0 or 6.0, respectively. Whenever the Froude parameter is greater than
those maximums, increase the maximum Lp required by 1/0Dc or XH for circular or rectangular (box)
culverts, respectively, for each whole number by which the Froude parameter is greater than 8.0 or 6.0,
respectively.
Once Lp has been determined, the width of the riprap protection at the furthest downstream point
should be verified. This dimension is labeled "T" on Figure 5-4. The first step is to solve for 0 using the
results from Figure 5-5 or Figure 5-6:
8 = tan -1
Where:
C2 (ExpansionFactor)/
1 1
• Expansion Factor = determined using Figure 5-5 or Figure 5-6
Eq. 5.9.3
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 58
T then is calculated using the following equation:
T = 2 (Lp tan6) + W
Eq. 5.9.4
Figure 5-4 Riprap Apron Detail for Culverts In Line with the Channel (USDCM, Vol 2 Figure 9-34)
EXTEND RIPRAP TO HEIGHT
OF PIPE OR BOX, MIN.
RIPRAP MORE THAN 1.0' ABOVE
PIPE INVERT SHALL BE INSTALLED
6" BELOW FINISHED GRADE AND
BURIED WITH TOPSOIL
FINISHED
GRADE
PLAN
NTS
END TREATMENT MAY CONSIST OF RCP END SECTION
(WITH TOEWALL) OR HEADWALL
L
TOEWALL
8" THICKNESS
3' MINIMUM DEPTH
i
nrnw
GEOTEXTILE EROSION
CONTROL. MIRAFI 300
OR EQUAL
t
2D50 MIN
PROFILE
NTS
SOIL RIPRAP OR
VOID -FILLED RIPRAP
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 59
Figure 5-5 Expansion Factor for Circular Conduits (USDCM, Vol 2 Figure 9-35)
S = Expansion Angle
0
c
v
N
cr
0
I --
U
ei.
EXPANSION
8
7
6
5
4
2
I
0
O
.2 .3 4 .5 .6 .7 .1
y
1
,
w'
a
inea
o
. o
....
It)
o
ts
O
1,
co -
j
/
r
/4
TAILWATER DEPTH/ CONDUIT HEIGHT, Y t / D
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A G F: 60
Figure 5-6 Expansion Factor for Rectangular Conduits (USDCM, Vol 2 Fig 9-36)
8 = Expansion Angle
7
6
m
c
a
N5
4
Q
2
0 3
2
a
2
X
W
1
0
l
F
Ate
ID
p
b {0
0
V
A
1
-
,
0 .1 .2 .3 .4 .5 .6 .7 .8
TAILWATER DEPTH/ CONDUIT HEIGHT-Yt/H
.9
1.0
The size of riprap can be found using the following graph after calculating Q/D1.5 and Yt/D, and reading
the value from Figure 5-7 and Figure 5-8, shown below.
Use Figure 5-7 to determine the required rock size for circular conduits and Figure 5-8 for rectangular
conduits. Figure 5-7 is valid for Q/D,2 5 of 6.0 or less and Figure 5-8 is valid for Q/WH1 5 of 8.0 or less. The
parameters n these two figures are:
Q/D1 5 or Q/WH°.5 in which Q is the design discharge in cfs, D, is the diameter of a circular conduit in feet,
and W and H are the width and height of a rectangular conduit in feet.
Yt/Dc or Yt/H in which Yt is the tailwater depth in feet, D, is the diameter of a circular conduit in feet, and
H is the height of a rectangular conduit in feet. In cases where Yt is unknown or a hydraulic jump is
suspected downstream of the outlet, use Yt/Dt = Yt/H = 0.40 when using Figure 5-7 and Figure 5-8.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA 1' N G F I 61
Figure 5-7 Riprap Erosion Protection at Circular Conduit (Valid for Q/D2.5≤6.0) (USDCM, Vol 2
Figure 9-38)
0
a
0
60
40
20
0
Cry
��►C�
#
.9-4,
404
tte
AR
-c
*91-
i--,
1.
TYPE
**
2
.4 .6
Yt/D
.8
Use Da instead of D whenever flow is supercritical in the barrel.
** Use Type L for a distance of 3D downstream
1.0
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 62
Figure 5-8 Riprap Erosion Protection at Rectangular Conduit Outlet (Valid for Q/WH1.5≤8.0)
(USDCM, Vol 2 Figure 9-39)
c. 4O
I
o
0
20
OO
`e
(.)(- A1/4
e
�Ce
g
o�
k
I
PE
1Y
ik*
.2
.4
Yt /H
6
8
1.0
Use Ha instead of H whenever culvert has supercritical flow in the barrel
**Use Type L for a distance of 3H downstream
After selecting the riprap size, the minimum thickness of the riprap layer is defined as:
T=2D50
Table 5-13, below, identifies d50 based on riprap classification and gradation.
Eq. 5.9.5
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 63
Table 5-13 Classification and Gradation of Ordinary Riprap
Riprap
Designation
% Smaller
Given Size
Than
by
Weight
Intermediate
Dimensions
(inches)
Rock
dso (inches)'
Type
VL
70-100
12
50-70
9
35-50
6
6"
2-10
2
Type
L
70-100
15
50-70
12
35-50
9
9"
2-10
3
.
Type
M
70-100
21
50-70
18
35-50
12
12"
2-10
4
I
r
•
Type
H
70-100
30
50-70
24
35-50
18
18
2-10
6
Type
VH
70-100
42
50-70
33
35-50
24
24
2-10
9
d50 = mean particle size (intermediate dimension) by weight.
" Mix VL and L riprap with 30% (by volume) topsoil and bury it with 6+ inches of topsoil, all
vibration compacted, and revegetate.
5.10 STORAGE
Weld County requires regional and/or on -site detention for all future developments. The County shall be
contacted to verify if any existing drainage master plans exist in the area of work. If it is determined that
there is an existing master plan for the area of work, the designer shall incorporate that information into
the design and ensure that the design follows the drainage requirements set forth in the masterplan.
The designer also should keep the following things in mind:
• Weld County does not allow detention release rates based on soil types.
• Weld County does not allow full spectrum detention to be used in sizing ponds (see Weld
County's spreadsheets for storage capacity).
5.10.1 Retention
Stormwater retention facilities (stormwater infiltration facilities) normally are not allowed in Weld
County but shall be considered for special circumstances with the issuance of a variance. Variance
requests shall only be considered in situations where there is a proven hardship on the proposed site. A
hardship would be considered where there is not adequate topography to physically drain a pond (sump
in basin), refusal of an irrigation ditch to accept additional drainage, or some other physical site
constraint. Variances shall be reviewed on a case -by -case basis to determine the validity of the hardship
and shall be signed by the CountyDevelopment Review Engineer. Upon the determination that a
retention pond is applicable, the volume should be calculated as 1.5 x the developed site runoff for the
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 64
100 -year, 24 -hour storm event plus 1 foot of additional freeboard. An emergency spillway is required for
retention ponds.
Retention ponds may be sized using the "Modified FAA" tab on the spreadsheet referenced in the
"Detention" portion of this document, using a near zero release rate per acre and extending the rainfall
duration to 1440 minutes (24 -hours x 60 minutes). The resulting volume at the 1440 -minute interval
shall be the value that must be multiplied by 1.5 for the final retention pond volume.
A second method for calculating retention pond volume is:
Volume = 1.5 x Area x C -Value x Rainfall
• Area = Site area draining to pond (acres)
• C -Value = Composite C -Value for area draining to pond (based on soil type and overall,
developed impervious percentage for site)
• Rainfall — NOAA Atlas rainfall depth for site location, 100 -year storm at 24 -hours ;in feet, divide
NOAA rainfall depth in inches by 12)
• Volume = Required Volume for Retention Pond in acre -ft
The retention pond/infiltration facility shall be designed to meet Colorado Revised Statute 37-92-602 (8)
drain time requirements. In order to meet the State Statute requirements, soil infiltration rates may be
used to calculate pond drain times. However, soil infiltration rates cannot be used in the overall sizing
of the detention/retention ponds. These requirements state that retention facilities:
• Be solely operated for stormwater management;
• Be owned and operated by a governmental entity or is subject to oversight by a governmental
entity;
• Continuously releases or infiltrates at least 97 percent of all runoff from a rainfall event that is
less than or equal to the 5 -year storm within 72 hours after the end of the event;
• Continuously releases or infiltrates at least 99 percent of the runoff from a rainfall event that is
greater than the 5 -year storm within 120 hours after the end of the event; and
• Operates passively and does not provide active water treatment processes for the stormwater.
5.10.2 Detention
Developments are required to detain the runoff (developed site condition) produced by the 100 -year, 1 -
hour storm event with 1 foot of additional freeboard. Pond release rates are based off the calculated
undeveloped runoff value for the site. A 2 -percent site imperviousness percentage should be used to
calculate the historic runoff rate for pond release values, regardless of site conditions prior to new site
improvements.
Release rates are calculated using the 5 -year, 1 -hour storm for urbanizing areas and the 10 -year, 1 -hour
storm for non -urbanizing areas. Urbanizing areas are defined as areas within one -quarter mile of any
municipal boundary, as amended. Non -urbanizing areas are greater than one -quarter mile in distance
from a municipal boundary. Municipal boundaries may be found on the County's GIS online mapping
website. If the project site is within an urbanizing area or adjacent to a municipal boundary, the
governing entity's drainage criteria must be taken into consideration. Weld County requires that the
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF 1 65
more restrictive of the criteria (if municipality is more conservative) must be used in the drainage design
of the site.
The design engineer shall submit all design worksheets for pond designs in the appendices of the
drainage report for review. Rainfall data/depths should be site specific and taken from the NOAA Atlas
14, online precipitation frequency data server webpage. A UD-Detention v2.34 worksheet is available on
the Weld County Planning and Zoning
Development Review webpage. This spreadsheet is an older, archived version of the MHFD's
spreadsheet, which utilizes the "Modified FAA" procedure for pond sizing with the County approved C -
values. The County DOES NOT accept the full spectrum detention pond design method. The design
consultant may use the downloadable spreadsheets or may create their own based on the information
provided in this document. If created spreadsheets are utilized, they must comply with the design
requirements in this document.
Rainfall duration times should be extended until the pond reaches a peak volume, after which the pond
volume falls. If the peak is not reached within a reasonable time period (less than two to three hours ±)
the volume at the 60 -minute interval may be taken as the required detention volume for the site. If a
series of detention ponds are proposed on -site, the County may require a SWMM model be created for
the development, so that the pond volumes/water surface elevations can be analyzed as routed ponds.
An excerpt from a previous version of USDCM, Volume 2 on the Modified FAA procedure has been
provided on the Weld County Planning and
Zoning Development Review Webpage, and in Appendix F for reference, if the consultant would like to
create their own pond -sizing spreadsheet.
The outlet works for detention and water quality facilities shall be designed to meet Colorado Revised
Statute 37-92-602 (8), drain time requirements. In order to meet the State Statute requirements, soil
infiltration rates may be used to calculate pond drain times. However, soil infiltration rates cannot be
used in the overall sizing of the detention/retention ponds. These requirements state that detention
facilities:
• Be solely operated for stormwater management;
• Be owned and operated by a governmental entity or be subject to oversight by a governmental
entity;
• Continuously release or infiltrate at least 97 percent of all runoff from a rainfall event that is less
than or equal to the 5 -year storm within 72 hours after the end of the event;
• Continuously release or infiltrate at least 99 percent of the runoff from a rainfall event that is
greater than the 5 -year storm within 120 hours after the end of the event; and
• Operate passively and do not provide active water treatment processes for the stormwater.
5.10.2.1 Pond Layout Considerations
The geometry of a stormwater detention facility depends on specific site conditions such as adjoining
land uses, topography, geology, preserving or creating wildlife habitat, and volume requirements.
Several key features must be incorporated in all detention facilities:
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE l 66
• Embankments and side slopes shall have a maximum slope of four feet horizontal to one foot
vertical (4:1) and shall be stabilized. Slopes steeper than 4:1 in detention basin a -eas will not be
accepted.
• Detention basin embankments shall be designed to withstand the 100 -year and larger storm.
Poorly compacted native soils shall be excavated and replaced. Embankment soi s shall be
compacted to at least 95 percent maximum density (Modified Proctor) or as specified in the
geotechnical report for the site.
• Detention basin bottoms shall have a minimum slope of 1 percent for vegetated surfaces. If the
desired slope is not attainable, a bottom slope of 0.5 percent may be used with a concrete
trickle channel.
• Water quality and detention flows are released through an outlet structure. The minimum
outlet pipe size for use in detention facilities is 12 -inch diameter (or equivalent).
Orifice/restrictor plates may be used to reduce flows from the minimum pipe sizes.
• When possible, place inflow culverts as far from the pond outlet as possible for increased water
quality through pond vegetation.
• Inflow points shall enter the detention basin at or near the toe of the basin to prevent erosion
along the basin embankments. If providing an inflow point at the toe of the basin is not feasible,
then erosion protection must be provided from the inflow all the way to the toe of the basin.
• Detention basin bottom must be a minimum of 24 inches above the groundwater elevation.
(Groundwater elevation data must be determined during high groundwater mon:hs.)
• Detention basins must be located a minimum of 20 feet away from an irrigation ditch or other
facility, or more if specified by the owner of the irrigation canal and protected frcm seepage
from the irrigation canal.
• Stormwater infiltration facilities shall not be placed in the FEMA mapped floodway and should
not be placed in the FEMA mapped 100 -year floodplain. Any berming within the floodplain will
require a floodplain study, which may result in the need for a LOMR/CLOMR.
5.10.2.2 Water Quality
With drain time requirements in mind, the outlet works for an extended detention basin shall be
designed to release the water quality capture volume (WQCV) over a 40 -hour period. The WQCV may be
calculated, along with the orifice hole sized, on the MHFD spreadsheet. An alternate method to
calculate the required WQCV is to use the equations taken from USDCM, Volume 3 as shcwn below.
The WQCV is calculated as a function of imperviousness and BMP drain time using Eq. 5.10.2.1, and as
shown in Figure 5-9:
WQCV = a(0.91i3 — 1.1912 + 0.78i) Eq. 5.10.2.1
Where:
WQCV = Water Quality Capture Volume (watershed inches)
a = Coefficient corresponding to WQCV drain time (5-)
i = Imperviousness (%/100)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 67
Figure 5-9 Water Quality Capture Volume (WQCV) Based on BMP Drain Time (USDCM, Vol 3 Fig
3-1)
(13
0
s
U
C
V
a)
r
w
co
,c
C�
CJ
0.500
0.450
0.400
0.350
0.300
0.250
0.200
0.150
0.100
0,050
0.000
e
I I
40
hour
drain
time
0
OP
f
r
24
hour drain time
WQC Vte
(0. 91 r- .1.191:
I
40.
780
4
of tee
.
12
24
-hr
-hr
drain
drain
time
time
a = 0.8
a = 0.9
r
40
-hr
drain
time
a = 1.0
I
r�r
12
hour
drain
time
�.r
•
0 0,1 0.2 0.3 0 4 ` 6 i 0.8
0.9
I
Total Imperviousness Ratio (i= la/100)
Figure 3-1. Water Quality Capture Volume (WQCV) Based on BMP Drain Time
Table 5-14 Drain Time Coefficients for WQCV Calculations
Drain Time
(hrs)
Coefficient, a
12
hours
0.8
24
hours
0.9
40
hours
1.0
Weld County does not require the use of trash racks be placed in front of the water quality plate. It shall
be at the discretion of the design engineer if trash racks are included. The WQCV is considered a part of
the overall detention/retention volume requirement and should not be added to the volume.
The water quality orifice plate perforations also may be found using the chart in Table 5-15 only.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 68
Table 5-15 WQCV Outlets Orifice Plate Perforation Sizing
Orifice Plate Perforation Sizing
Circular Perforation Sizing
This table may be used to size perforation in a vertical plate of riser pipe.
Hole
(in.)
Dia.
*
Hole
(in.)
Dia.
Min.
S
(in.)
Area
per Row (sq.
in.)
n= 1
n= 2
n= 3
1/4
0.250
1
0.05
0.10
0.15
5/16
0.313
2
0.08
0.16
0.24
3/8
0.375
2
0.11
0.22
0.33
7/16
0.438
2
0.15
0.30
0.45
1/2
0.500
2
0.20
0.40
0.60
9/16
0.563
3
0.25
0.50
0.75
5/8
0.625
3
0.31
0.62
0.93
11/16
0.688
3
0.37
0.74
1.11
3/4
0.750
3
0.44
0.88
1.32
13/16
0.813
3
0.52
1.04
1.56
7/8
0.875
3
0.60
1.20
1.80
15/16
0.938
3
0.69
1.38
2.07
1
1.000
4
0.79
1.58
2.37
1
1/16
1.063
4
0.89
1.78
2.67
1
1/8
1.125
4
0.99
1.98
2.97
1
3/16
1.188
4
1.11
2.22
3.33
1
1/4
1.250
4
1.23
2.46
3.69
1
5/16
1.313
4
1.35
2.70
4.05
1
3/8
1.375
4
1.48
2.96
4.44
1
7/16
1.438
4
1.62
3.24
,
4.86
1
1/2
1.500
4
1.77
3.54
5.31
1
9/16
1.563
4
1.92
3.84
5.76
1
5/8
1.625
4
2.07
4.14
6.21
1
11/16
1.688
4
2.24
4.48
6.72
1
3/4
1.750
4
2.41
4.82
7.23
1
13/16
1.813
4
2.58
5.16
7.74
1
7/8
1.875
4
2.76
5.52
8.28
1
15/16
1.938
4
2.95
5.90
8.85
2
2.000
4
3.14
6.28
9.42
n =
Number
of
columns
of
perforations
Minimum
steel
plate
thickness
1/4"
5/16"
3/8"
* Designer
the
needed
may
interfere
area if desired.
to the
nearest 32'''' inch to better match
Rectangular Perforation sizing
Use only one rectangular column whenever two
2,inch diameter circular perforations cannot provide
needed outlet area.
Rectangular Height = 2 -inches
Rectangular Width = Required Area per Row / 2
Rectangular
hole
Width
Min.
Thickness
Steel
5"
1/4"
6"
1/4"
7"
5/32 "
8"
5/16"
9"
11/32
"
10"
3/8"
> 10"
1/2
"
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 69
5.10.2.3 Outlet Structure
Included below is a typical configuration for a detention pond outlet structure. The detail shows the
general features and layout of the basic components of a typical outlet structure. Figure 5-10 is not a
construction detail. The design engineer will be required to design the outlet structure to meet the
needs of the individual site plan and topography.
In addition, the following items must be included in the outlet structure design:
• The outlet pipe must contain a minimum of two concrete cutoff walls embedded a minimum of
18 inches into undisturbed earthen soil. The cutoff walls must be a minimum of 8 inches thick.
• The outlet pipe bedding material must consist of native earthen soil, not granular bedding to at
least the first downstream manhole or daylight point.
• A water quality plate designed to release the WQCV in 40 -hours attached to the front of the
structure. Plate should be a tight fit with no gaps. Gasket or seal could help facilitate this fit.
• A restrictor plate attached to the back wall of the structure to limit the pond release to the
calculated 5 -year or 10 -year historic runoff rate for the site (see detention pond section for
details)
• The outlet pipe must be a minimum diameter of 12 -inches.
• To reduce maintenance and avoid operational problems, outlet structures must be designed
with no moving parts other than the trash rack (i.e. use only pipes, orifices, and weirs). Manually
and/or electrically operated gates shall be avoided. To reduce maintenance, outlets should be
designed with openings as large as possible, compatible with the depth -discharge relationships
desired and with water quality, safety, and aesthetic objectives in mind.
• Outlets should be robustly designed to lessen the chances of damage from debris or vandalism.
Avoid the use of thin steel plates as sharp -crested weirs to help prevent potential accidents,
especially with children. Trash racks must be provided on all outlet structures.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 70
Figure 5-10 Outlet Structure Plan and Profile Example
OUTLET REQUIREMENTS
WQCV SHALL BE RELEASED OVER 40 HOURS
• OUTLET WORKS SHOULD BE SIZED AND
STRUCTURALLY DESIGNED TO RELEASE AT
NO MORE THAN THE 1 -HOUR, 5 -YEAR
HISTORIC RELEASE RATE IN URBANIZING
AREAS AND THE 1 -HOUR. 10 -YEAR HISTORIC
RELEASE RATE IN NON -URBANIZING AREAS.
▪ OPENINGS IN THE SAFETY GRATE SHALL
ALLOW ENOUGH FLOW TO PASS THE 5 -YEAR
OR 10 -YEAR HISTORIC FLOW (DEPENDENT
ON URBANIZATION CLASSIFICATION). USING
A 50% CLOGGING FACTOR.
STEEL FOR GRATES AND GRATE
INSTALLATION HARDWARE SHALL BE
GALVANIZED AND CONSTRUCTED IN
ACCORDANCE WITH CDOT SECTION 112.06.
- CONCRETE SHALL BE CDOT CLASS D, 4500
PSI IN 28 DAYS, PER CDOT SPECIFICATION
SECTION 601.
- REINFORCEMENT BARS SHALL BE PER CDOT
SPECIFICATIONS. SPACING AND SIZE TO BE
DETERMINED BY CONSULTING DESIGN
ENGINEER
- STEPS SHALL BE PROVIDED WHEN HEIGHT IS
GREATER THAN 3'-6' AND SHALL CONFORM
TO AASHTO M 199
OUTLET _ STRUCTURE
SAFETY
GRATE
eyiOUTLET PIPE
12" MIN.
RESTRICTOR
ORIFICE PLATE
bk
WATER QUALITY
z PLATE
r"
WQCV ORIFICE PLATE
(HOT -DIPPED
GALVANIZED STEEL)
PLAN VIEW
1 1 I
III
SECTION A -A'
SAFETY GRATE
WQCV WSEL -\
WOCV ORIFICE PLATE
HOT -DIPPED
GALVANIZED STEEL
�
JI
I
a
4
WQCV WSEL
100 -YEAR RESTRICTOR
ORIFICE PLATE PLATE
(3/8" MIN HOT -DIPPED
GALVANIZED)
1O0 -YEAR RESTRICTOR
ORIFICE PLATE PLATE
(318' MIN. HOT -DIPPED
GALVANIZED)
OUTLET PIPE
12' MIN
V\ \ / \/
\,// /// / // /
,-\\ \\/./ \ X/`
,\,// , // , //, /X /X // //a //a //, /
SECTION B —B'
5.10.2.4 Stage Storage Curves
A relationship between the water surface elevation and detention basin volume, commonly referred to
as a "stage -storage" curve, needs to be developed for each pond. The afore mentioned MHFD
spreadsheet will calculate a stage -storage table based on overall pond dimensions, however the County
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 71
requires the stage -storage volumes be based on the actual site design contours. The volumes may be
calculated in the "Basin" tab of the spreadsheet by using the "Surface Area at Stage (ft2) override"
column or by using the equation below.
Another method of calculating the stage -storage volume is called the "Conic" method and is based on
the following formula:
Where:
D (A B V AB)
3
V= Volume between two contours, ft3
D= Depth between contours, feet
A= Area of bottom contour, ft2
B = Area of top contour, ft2
Eq. 5.10.2.2
A cumulative volume should be provided for the progressing stages/depth of the pond. The required
pond volume for water quality and detention should be compared to the available pond volume
provided in the design. The information should be clearly shown in the project's drainage report.
5.10.2.5 Spillway
Detention ponds and stormwater infiltration facilities (retention ponds) shall contain an emergency
spillway capable of conveying the peak 100 -year storm discharge (from developed site) draining into the
pond/infiltration facility. The spillway also should be capable of passing any off -site flows that are routed
through the pond un-detained. The spillway location should be placed so that downstream properties or
residences are not adversely affected. The invert of the emergency spillway must be equal to or above
the 100 -year WSEL. The elevation of the top of the embankment should be a minimum of 1 foot above
the water surface elevation when the emergency spillway is conveying the maximum design or
emergency flow. The depth of flow over the emergency spillway shall be 6 inches or less. Additional
spillway details are shown in Appendix J.
Flow over a horizontal spillway can be calculated using the following equation for a horizontal broad -
crested weir, shown below.
Where:
Q
C LH1.5
BCW
Q = Discharge, cfs
CBCW = Broad -crested weir coefficient, dimensionless (ranges from 2.6 to 3.0)
L= Length of weir, ft
H= Head above weir crest, ft
In addition, the County requires the following items be included in the spillway design.
Eq. 5.10.2.3
• A concrete cutoff wall 8 inches thick, 3 feet deep, and extending a minimum of 5 feet into the
embankment on each side of the emergency spillway opening is required on all privately
maintained detention ponds/infiltration facilities and regional detention ponds/infiltration
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA I 72
facilities. The concrete cutoff wall permanently defines the emergency spillway opening. The
emergency spillway elevation shall be tied back into the top of the embankment using a
maximum slope of 4:1.
• To protect the emergency spillway from catastrophic erosion failure, riprap shall be placed from
the emergency spillway downhill to the embankment toe of slope, with a toe -down constructed
to a depth of 4xD50. The minimum D50 for riprap on the emergency spillway shall be 12 inches
(Type M). Riprap may be either grouted or buried. If buried, the protected area shall be covered
with 6 inches of topsoil and seeded. Revegetation requirements for storage facilities can be
found in Chapter 8 of this WCECC.
A detail of the preferred spillway design is in Figure 5-11 below.
Figure 5-11 Emergency Spillway Typical Design
EMERGENCY SPILLWAY
1' A11N'MUr 1
FRONT VIEW
WQCV WSEL
WQcv
ORIFICE
PLATE
•
MAXIMUM St OPE OF 4 1
OVERTOPPING
SPILLWAY WATER
SURFACE
100 YEAR WSEL
100 YEAR WSEL
OR HIGHER
6" MAXIMUM
- FLOW OVER
SPILLWAY
VARIES
- 6' MAX
8" MINIMUM THICKNESS
/ fH
% 11
SAFETY GRATE / 1
r'- EMERGENCY -'
1 / SPILLWAY WALL
/
` 100 -YEAR
RESTRICTOR
PLATE
CONCRETE
CUTOFF WALL
EMERGENCY SPILLWAY REQUIREMENTS
HEADWALL AT
END OF PIPE
OUTLET PIPE
MINIMUM SIZE 12"
CONCRETE
CUTOFF WALL
SIDE VIEW
1' MINIMUM
1• 111.1 r
1
.
. -
COMPACTED EARTH
95% STANDARD
PROCTOR DENSITY
•
S
.'
TWO #5 BARS
BURIED OR GROUTED RIPRAP (DEPTH = 2 x D,, )
PLACED TO TOE OF SLOPE
GEOTEXTILE FABRIC MIRAFI FW 300
OR APPROVED EQUAL
LOW TAILWATER BASIN
IF VELOCITY EXCEEDS 2 FPS
\"\
EACH DETENTION POND SHALL CONTAIN AN EMERGENCY SPILLWAY CAPABLE OF CONVEYING THE PEAK 100 -YEAR STORM AT A DEPTH OF SIX (6) INCHES
OR LESS. BURIED OR GROUTED RIPRAP SHALL BE PLACED FORM THE EMERGENCY SPILLWAY DOWNHILL TO THE EMBANKMENT TOE OF SLOPE AND
COVERED WITH SIX (6) INCHES OF TOPSOIL. IF BURIED. THE RIPRAP MUST BE SIZED AT THE TIME OF FINAL ENGINEERING DESIGN GROUTING OF THE
RIPRAP MAY BE REQUIRED.
IN ORDER TO PREVENT DAMAGE TO PUBLICLY -OWNED INFRASTRUCTURE (ROADS. ROADSIDE DITCHES). A CONCRETE CUTOFF WALL EIGHT 18) INCHES
THICK. THREE (3) FEET DEEP, AND EXTENDING A MINIMUM OF FIVE (5) FEET INTO THE EMBANKMENT ON EACH SIDE OF THE SPILLWAY OPENING IS
REQUIRED ON ALL DETENTION PONDS THE EMERGENCY SPILLWAY ELEVATION MUST BE TIED BACK INTO THE TOP OF THE EMBANKMENT USING A
MAXIMUM SLOPE OF 4.1
CONCRETE SHALL BE CDOT CLASS D. 4500 PSI IN 28 DAYS PER CDOT SPECIFICATION SECTION 601.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 73
5.10.2.6 Maintenance
Maintenance for stormwater storage facilities should follow the recommendations in the USDCM,
Volume 3, unless otherwise specified by the design engineer. It is recommended that stormwater
infiltration facilities be scraped/plowed every few years to prevent sedimentation and/or clogging and
to ensure proper infiltration is being achieved. Areas designated for stormwater drainage, detention, or
stormwater infiltration, are not to be used for materials storage, building, or parking, and should not be
modified without approval from the Department of Public Works. Access also must be provided to the
drainage facilities for long-term maintenance. Refer to Section 5.3.1 of this WCECC for O&M submittal
requirements.
5.10.2.7 Exceptions to Detention Requirements
Below is a4ist of developments that may qualify for exceptions from detention requirements. Exceptions
to stormwater detention must be shown toshall not jeopardize the public health, safety, and welfare of
public and private property. The following exceptions are provided in Chapter 8, Article XI, of the Weld
County Code and are subject to updates:
• Use by right or accessory use in the A (Agricultural) Zone District
• Zoning permits for accessory storage, commercial vehicles, home occupations, or manufactured
homes in the A (Agricultural) Zone District
• A second dwelling permit in the A (Agricultural) Zone District
• Towers, including but not limited to wind and telecommunication towers
• Pipelines or transmission lines, excluding laydown yards, metering sites, substations, and any
other above ground appurtenances
• Gravel pits, if the stormwater drains into the gravel pit. Releases from the site shall comply with
the Weld County Storm Drainage Criteriathis Engineering and Construction Criteria Manual,
including dewatering. Topographical information will be provided.
• Rural residential developments with no historic flooding, where all the following conditions
exist. This exception shall be supported by calculations provided by the Applicant. Additional
information may be requested and will be signed and stamped by a Colorado licensed
Professional Engineer:
a. There are nNine ;9) lots or fewer.
b. The average minimum lot size is >--equal to, or greater than, three (31 acres per lot.
Downstream roadway criteria are not exceeded.
c. The total post -development imperviousness for the rural residential development does not
exceed 10 ten percent :10%), assuming that all internal roads and driveways are paved
eventually will be paved.
• Development of sites where the change of use does not increase the imperviousness of the site.
Note: This exception cannot be applied to sites where impervious surfaces were added for, or in
conjunction with, a business that is/was operating in violation and/or without the required Weld
County land use permit.
• Non urbanizing areas wiere t tota pre-exi-sting and post ceve opment impervious area
produces stormwater runoff of ≤ 5 cubic feet per second (cfs) fo-r the 1 hour, 100 year storm
ned anc stamper by a Colorado
licensed Professional Engineer.A parcel of land or proect site where the "total developed
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X74
stormwater runoff" from the 100 -year, 1 -hour storm is less than, or equal to, five ;5) cfs. The
"total developed stormwater runoff" includes cumulative runoff from the proposed project site
plus runoff from any previously developed project site on the subject parcel. A project site is
the area of land that lies within the project's limits of disturbance during construction. This
exception shall be supported by calculations signed and stamped by a Colorado Licensed
Professional Engineer.
• In -fill development Parcels parcels with total area -Mess than, or equal to, one 11.0;_ gross acre
• An individual parcel with an unobstructed flow path and no other parcel(s) between the channel
within a Federal Emergency Management Administration (FEMA regulatory floodplain channel
and the project.
• A parcel -greater than one 11 gross acre and c -less than, or equal to five (5 gross acres in size
is allowed a onetime exception for a new four thousand :24,000h square foot (sq. ft. building
or equivalent imperviousness.
A parcel > 5 gross acres in size is allowed a onetime exception for a new 4,500 sq. ft. buildi-ng-of
100% impervious area or equivalent imperviousness.
• A parcel greater than five (5) gross acres in size is allowed a onetime exception for a new nine
thousand (9,000) sq. ft. of 100% imperviousness area or equivalent imperviousness.
• Concentrated Animal Feeding Operations (CAFOs), Animal Feeding Operations (AFOs), and
Housed Commercial Swine Feeding Operations (HCSFOs) that which are covered and approved
by the Colorado Discharge Permit System (CDPS) regulations. Portions of the site not included or
covered by the CDPS permit shall comply with the criteria set forth in this Chapter.
addressing the following itemsException requests shall be supported with an approved d-ainage
narrative, which must describe the following minimum criteria:
• The exception being requested for
consideration.
• The exception being requested for considerationAny existing and proposed improvements to
the property.
• Where the water originates if it flows onto the property from an offsite source.
• Where the water flows as it leaves the property.
• The direction of flow across the property.
• Previous drainage problems with the property, if any.
• The location of any irrigation facilities adjacent to or near the property._
• Any additional information pertinent to the development:
During the review of the application, the Weld County Public WorksDepartment of Planniig and Zoning
Department will determine if the exception is applicable and will not jeopardize the healti, safety, and
welfare of public and private property.
5.10.3 Dam Information
All detention ponds shall be evaluated to verify if the detention facility would be classifiec as a non -
jurisdictional or jurisdictional dam, per the State of Colorado Department of Natural Reso arces criteria.
Refer to Table 5-16.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 75
Table 5-16 Non -Jurisdictional vs Jurisdictional Dam Criteria Summary
Non
-Jurisdictional
Dam
Jurisdictional
Dam
Jurisdictional
Height
of
Berm
< 10
ft
> 10
ft
Water
Line)
Storage
Area (at
High
Water
< 20 ac
> 20 ac
Water
Storage Volume
< 100
ac -ft
> 100
ac -ft
*This table is a general summary of the required State Criteria. The Designer shall be required to determine which category their
design would be classified as and determine the required protocol. This information will then be supplied to the County for
record keeping purposes.
If it is determined that the detention facility is classified as a jurisdictional dam, state procedures must
be followed. It should be noted that non -jurisdictional -size dams are regulated and subject to the
authority of the State Engineer consistent with Sections 37-87-012 and 37-87-105 C.R.S.,
Implementation of detention ponds, and will require the design engineer to consult with the State
Engineer's Office to verify the legal right to store water.
5.10.4 Irrigation Ditches/Private Irrigation Systems
It is not the intent to allow new private irrigation systems to be located within County right-of-way.
Irrigation ditches shall not be used as conveyance systems and/or outfall points for stormwater runoff
for all land use cases including, but not limited to: Uses by Special Review, Site Plan Reviews,
Subdivisions, or Planned Unit Developments, unless such use is approved, in writing, by the ditch
owner(s). The approval shall be in the form of signature on the construction plans/documents or other
formal legal agreements as required by the ditch company or owner. Should direct discharge of
stormwater runoff be permitted, water quality treatment may still be required.
In the instance where an irrigation ditch serves as the outfall for a stormwater detention facility, the
following items must be met:
• The maximum water surface elevation must be determined based on the maximum amount of
irrigation flow in the ditch. The appropriate owner/ditch or reservoir company is the
determining authority regarding the maximum irrigation flow in the ditch. Written verification of
the maximum irrigation flow from the owner/ditch or reservoir company must be submitted
with the hydraulic analysis of the ditch water surface elevation.
• The detention outlet must be designed such that backflow from the ditch into the detention
facility is prevented.
• The backwater effects caused by the design of a detention outlet, if any, must be reviewed and
approved by both the County and the appropriate ditch or reservoir company.
• The outlet design must consider tailwater effects on the outlet pipe resulting from the
combination of the maximum irrigation flow and the 100 -year storm discharge within the ditch.
• Drain times need to adhere to Colorado Revised Statute 37-92-602 (8) drain time requirements
as listed in the "Detention Pond" section of this document.
If new developments are adjacent to irrigation facilities but no flows are being directed into the ditch,
the owner/ ditch or reservoir company must still be notified of the proposed development. In such
cases, it shall be the developer's engineer responsibility to provide drawings and calculations to support
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 76
the fact the irrigation ditch is not impacted. These drawings and calculation shall be supplied to the
County and ditch company owner.
The party seeking modifications to existing ditch conditions must obtain the appropriate owner / ditch
or reservoir company approvals and signatures prior to seeking Weld County approval for such
modifications.
The party seeking modifications to the existing irrigation facilities must coordinate with the irrigation
system owner/operator to provide an adequate design to make the irrigation system function as it did
prior to the improvements. When modifications to existing irrigation systems are necessary, the
following must be provided to the County review staff:
• Information on how the existing private irrigation facilities are to be protected or routed
through the project site.
• Plan and profile drawings of any new irrigation pipes should be included in the drawing set,
similar to information for proposed storm lines.
• A hydraulic model showing the irrigation pipe system at full irrigation flows shou d be provided
in the drainage report for review by County staff.
• Irrigation flows should be provided by the owner of the irrigation system, not estimated on
existing pipe or ditch sizes.
• Details of any irrigation structures required should be provided in the plan set for the
development. Dimensions of the structures, concrete type and thickness, rebar type and
spacing, grates, weir boards, bridge, trash racks, connecting hardware, air vents etc. should be
included in the details of the irrigation structures.
• Owner approval of the new system is required before construction can proceed.
• Proposed private irrigation facilities for new developments or reconfigured existing irrigation
systems should be located outside of the public right-of-way.
As -built survey is required documenting all changes in direction and structure critical elements plus
video of all pipes installed verifying pipe connections and debris removal.
5.11 STORMWATER DRAINAGE CRITERIA VARIANCES
In cases of hardship, an applicant is able toma_y apply for a variance from a requirement of the storm
drainage criteria. Weld County will not approve design variances seenfound to be detrimental to the
public health, safety, and general welfare or when the request is contrary to the purpose and intent of
the criteria set forth in this document or the Weld County Code. The variance procedure is intended to
address cases of hardship, and requests will not be granted when the hardship is brought about solely
through the actions of the appellant.
Variance requests shall be stamped and signed by a professional civil engineer licensed to practice in the
State of Colorado and shall be submitted with the Certificate of Compliance. DevelopmentVariance
requests will be reviewed by the Public Works Director or his/her designeeDevelopment Review
Engineer. To be reviewed, the variance request must:
• State the hardship that is causing the request for a variance from Weld County Code. Provide
proof of the hardship in the drainage memo/letter provided.
• Describe the design criteria of the Weld County Code from which a variance is beiig requested.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 77
• Describe the proposed alternative with engineering rationale that supports the intent of the
Weld County Code.
• Meet the design intent of the Weld County Code.
• Demonstrate that granting of the variance will still adequately protect public health, safety, and
general welfare.
• Demonstrate there are no adverse impacts from stormwater runoff to the public rights of way
and/or offsite properties as a result of the project.
Applicants may appeal the denial of a variance to the BOCC pursuant to the provisions in Chapter 2,
Article IV, Section 2-4-10 of the Weld County Code. Variance requests, if accepted, are not precedent
setting and are based on site -specific constraints.
5.12 OIL AND GAS STORMWATER MANAGEMENT
The following standards apply only to the development of oil and gas exploration and production in the
Weld Mineral Resource (Oil and Gas) Area. These standards shall be supported by calculations signed
and stamped by a Colorado licensed Professional Engineer and accepted by the Weld County
Department of Public Works. See also Chapter 21 of the Weld County Code.
• Oil and Gas Tank battery secondary containment. When calculating the Oil and Gas Location
imperviousness and pervious areas, secondary containment areas may be excluded from the
total site imperviousness and pervious calculations provided that the secondary containment
area is appropriately sized to hold the originally designed safety containment volumes plus the
100 -year, 1 -hour storm rainfall event.
• Detention pond storage volume. In non -urbanizing areas during the Construction Phase,
detention ponds shall be sized to store the stormwater runoff generated by the 1 -hour, 100 -
year storm falling on the developed site and release of the detained water at the historic runoff
rate of the 1 -hour, 10- year storm falling on the undeveloped site or at 5 cfs, whichever is
greater. Historic is defined as an undeveloped site (before any development) with an assumed
2.0 percent imperviousness maximum. During the Production Phase or in urbanizing areas,
detention ponds shall adhere to Sec. 8-11-100.A.1. of the Weld County Code.
• Detention pond freeboard. During the Construction Phase, less than 1 foot of freeboard may be
allowed on a case -by -case basis. This exception shall be supported by calculations signed and
stamped by a Colorado licensed Professional Engineer and accepted by the Weld County
Department of Public Works. During the Production Phase, the detention pond shall adhere to
Sec. 8-11-100.A.4 of the Weld County Code.
• Emergency spillway. To prevent damage to publicly owned infrastructure (roads, roadside
ditches), a cutoff wall is required on all privately maintained detention ponds and retention
ponds. The cutoff wall permanently defines the emergency spillway opening. The emergency
spillway elevation must be tied back into the top of the embankment using a maximum slope of
4:1. The cutoff wall must either be constructed of concrete or galvanized steel sheet pile.
Concrete cutoff walls must adhere to Sec. 8-11-100.A.7 of the Weld County Code. Steel sheet
pile cutoff walls must be hot dipped galvanized steel of %-inch thickness or 3 -gauge and extend
3 feet below the bottom of the pond or per manufacturer's recommendation, whichever is
greater. If steel sheet pile is proposed for the cutoff wall, the native soils must be tested for
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 78
sulfate levels. If the sulfate levels are above 1.0 percent, the sheet pile shall be cated with a
corrosion -resistant epoxy.
• Retention pond. Retention facilities shall be allowed without a variance only dur ng the
Construction Phase. Retention facilities that are proposed for the Production Phase require the
issuance of a variance requested by the Applicant and accepted by the Weld County Department
of Public Works.
Additionally, as part of the application for a 1041 WOGLA Permit, an Operator shall provide proof of a
valid stormwater discharge permit issued by CDPHE. The Operator shall submit a drainage report to
comply with required Storm Drainage Criteria pursuant to Chapter 8, Article XI of the Weld County Code.
Additional requirements for Municipal Separate Storm Sewer System (MS4) areas may be applicable
pursuant to Chapter 8, Article IX of the Weld County code.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 79
CHAPTER 6 GRADING EROSION CONTROL AND MS4 REQUIREMENTS
6.1 EROSION CONTROL & GRADING REQUIREMENTS
Weld County requires an erosion control and grading plan. Erosion control methods are implemented to
prevent the offsite transport of sediment from land- disturbing activities. Erosion has the potential to
damage adjacent properties and County drainage systems, as well as contributing to the degradation of
water quality. When properly installed and maintained, temporary control measures provide effective
erosion control for a site. At a minimum, a stormwater management plan (SWMP) shall include erosion
control and grading plans.
6.1.1 Applicability
Sites disturbing more than one acre (Sec. 8-12-30.B) of land_ or any applicable earth disturbance in an
ent are required to obtain a Grading Permit. For MS4
areas the MS4a grading permit may be required for any disturbance. The definition of disturbance in the
Weld County Code is when the surface area of the land's surface is disturbed by any work activity upon
the property by means including, but not limited to, grading; excavating; stockpiling soil, fill, or other
materials; clearing; vegetation removal; removal or deposit of any rock, soil, or other materials; or other
activities that expose soil. Disturbed area does not include the tillage of land that is zoned agricultural or
the tillage of a parcel zoned PUD (planned unit development) within the area identified for agricultural
uses. For Grading Permit exemptions, refer to Section 8-12-30 of the Weld County Code.
6,1.2 Grading and Erosion Control Plans
When applying for a Grading Permit, a Grading Plan, a Utility Map (Sec. 8-12-50.C), a Drainage Plan and
a Sediment & Erosion Control Plan shall be submitted for review. A Grading Permit Checklist, provided in
Appendix G, should be used for guidance in developing the Grading Plan and Sediment & Erosion
Control Plan to expedite the review process.
The main components of the Grading Plan and Sediment & Erosion Control Plan are:
1 Site Drainage —identifying existing and proposed grading and drainage features (swales, inlets,
manholes, curb and gutter, concrete pans, culverts, roof drains, ponds, and outlet structures)
designed to convey stormwater runoff. Site drainage grading will be consistent with accepted
Drainage Plan for the site.
2 Temporary Control Measures (BMPs) identifying, detailing, and locating all structural and non-
structural temporary control measures used during each phase of construction, from initial
disturbance to final stabilization, to prevent the discharge of sediment from the site.
Additionally, the plan will include installation, implementation, maintenance, and removal
specifications for each structural control measure and a narrative description of each non-
structural control measure.
3 Permanent Stabilization —identifying the means and methods used to achieve stabilization for
all disturbed areas. Stabilization includes, but is not limited to; seed mix, seed application
method, mulch type, mulch application method, soil testing, soil amendments, and erosion
control blankets. Additionally, the plan will include installation, implementation, and
maintenance specifications for each structural control measure and a narrative description of
each non-structural control measure.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 80
A complete set of plans will include separate plan sheets for
as follows:
three phases of construction identified
1. Initial Phase depicting current site conditions, including existing structures, drainage patterns,
topography, etc.
2. Interim Phase —depicting temporary control measures used during active construction.
Depending on construction phasing, multiple sheets may be required. At a minimum, vehicle
tracking, perimeter control and inlet/outlet protection will be addressed with temporary control
measures. In addition, the plans should note that a state -issued Dewatering Permit will be
obtained and submitted to Weld County Public Works prior to any dewatering activities.
3. Final Phase —depicting temporary control measures to remain in place after construction until
the site reaches final stabilization. Final stabilization is when all landscaping is complete and
seeding has reached at least 70 percent uniform permanent vegetative cover. At a minimum,
perimeter control will remain in place and maintained until final stabilization is reached. In
addition, other temporary control measures may be required to remain in place and maintained,
if necessary, to prevent offsite sediment transport while waiting for vegetative growth.
Plan sheets will be submitted electronically digitally and should be clear and legible. The Development
Review Engineer reserves the right to require plan modifications for readability purposes. In addition,
each temporary control measure used will be located on the applicable site plan and referenced in the
legend, and an installation and implementation specification will be attached. Public Works
recommends using USDCM Volume 3, Chapter 7, Construction BMPs, for clear and specific installation
and implementation specifications. Other methods may be approved on a case -by -case basis.
6.1.3 Implementation
During construction, the Grading Plan, Utility Map, Drainage Plan and Sediment & Erosion Control Plan
shall be kept onsite and available for reference by site workers and County inspectors. In accordance
with the state- issued Construction Permit, temporary control measures should be inspected by a
Qualified Stormwater Manager at a minimum of every two weeks and after storm runoff events;
however, more frequent inspections may be necessary to properly maintain temporary control
measures.
If changes to the approved Grading Plan and Erosion & Sediment Control Plan are necessary, Public
WorksWeld County shall be contacted to determine if a Grading Permit modification is necessary. Public
WorksWeld County inspectors shall verify site conditions with the approved set of plans. Violations may
occur if site conditions do not reflect the approved plans.
6.1.4 Grading Permit Deadline (Fee) & Extension
6.1.4 6.1.5 Tracking Control
Tracking control is required when construction activity is accessing onto a roadway surface other than
gravel. There are three tracking control options when required to mitigate impacts to the public road,
including damages and/or offsite tracking of mud or other materials. Regardless of option, drainage
and/or culverts must be maintained. The associated appropriate tracking control devices for each
situation are listed below.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 181
• Permanent access onto concrete, asphalt, or recycled asphalt (RAP) public road
a. Double cattle guards used in combination with 100 feet of asphalt
b. Or 300 feet of asphalt
• Permanent access onto gravel public road
a. Double cattle guards with 100 feet of aggregate surface course (See Section 9.6.6)
b. Or 300 feet of aggregate surface course (See Section 9.6.6)
c. Aggregate surface course (See Section 9.6.6) on all drive surfaces
• Temporary access onto either concrete, asphalt, or recycled asphalt (RAP) or gravel public road.
Culverts or accepted drainage report may be required for temporary access control pads.
a. County accepted prefabricated tracking pad
b. Aggregate with base and a minimum of 70 feet long (per Error! Reference source not
found.Figure 6-1)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 182
Figure 6-1 Tracking Control for Temporary Accesses
0
z
0
CC
CD
c,
z
►_
U)
X
W
EXISTING GROUND
• SHALL EXTEND FULL WIDTH
OF INGRESS AND EGRESS
OPERATION
PLAN VIEW
70" MIN.
MIRAFI FW300 GEOTEXTILE
OR EQUIVALENT
ELEVATION SECTION
6" MIN
XISTING GROUND
N-MIRAFI FW300 GEOTEXTILE
OR EQUIVALENT
SECTION B -B
NOTES:
1. AGGREGATE SHALL CONFORM TO CDOT SPECIFICATIONS. SUBSECTION 208
2. THE CONTRACTOR SHALL PROTECT CURB AND GUTTER, EDGE OF PAVEME
OF GRAVEL ROAD THAT CROSSES OR IS ADAJACENT TO THE ENTRANCE FR(
WHILE NOT BLOCKING FLOW OF WATER. IN THE CASE THERE IS AN EXISTING
CULVERT IS REQUIRED. PROTECTION OF THE ADJACENT ROADWAY MATERIAL:
ABOVE SHALL BE INCLUDED IN THE COST OF THE WORK AND NOT PAID FOI
3. ALL MATERIALS AND LABOR TO COMPLETE THE VEHICLE TRACKING PAD
INCLUDED IN THE COST OF THE WORK AND NOT PAID FOR SEPARATELY.
4. THE PAY ITEM NUMBER FOR VEHICLE TRACKING PAD (EACH) IS CDOT ST
SPECIFICATION 208-00070.
EXISTING PAVEMENT
OR GRAVEL ROAD
(DEPTH VARIES)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 83
6.2 MS4 REQUIREMENTS
Sites located in Weld County's state -permitted Municipal Separate Storm Sewer System (MS4) area are
required to comply with the Grading Permit requirements as well as additional MS4 requirements. Weld
County is categorized as Phase II. An MS4 is a conveyance or system of conveyances that is:
• Owned by a state, county, city, town, or other public entity that discharges to waters of the
United States
• Designed or used to collect or convey stormwater (including storm drains, pipes, ditches, etc.)
• Not a combined sewer
• Not part of a publicly owned treatment works (sewage treatment plant)
EPA's Stormwater Phase II Rule established a management program that is intended to reduce the
quantity of pollutants that enter MS4s from stormwater. Common pollutants include oil and grease
from roadways, pesticides and fertilizers, sediment from construction sites, and discarded trash. When
deposited into nearby waterways through MS4 discharges, these pollutants can impair the waterways,
discourage recreational use, contaminate water supplies, and interfere with the habitat for aquatic
organisms, fish, and wildlife.
In compliance with the provisions of the Federal Water Pollution Control Act (commonly referred to as
the Clean Water Act), as amended (33 USC 1251 et seq.), the EPA promulgated rules establishing Phase I
of the NPDES stormwater program in 1990. The 1990 Phase I program requires operators of medium
and large MS4s (defined as those serving populations of 100,000 or greater) to implement a stormwater
management program to control pollution. State law has similar provisions (Colorado Water Quality
Control Act, CRS 25-8-101 et seq).
The 1999 Stormwater Phase II Rule extended coverage of the NPDES stormwater program to certain
"small" MS4s in urbanized areas (those serving populations of 10,000 to 100,000). Small MS4s located in
urbanized areas are defined by the Census Bureau based on the most recent Census. New urbanized
areas will be identified in each subsequent Census, occurring every 10 years. Generally, Phase I MS4s are
covered by individual permits, and Phase II MS4s are covered by a general permit. Each regulated MS4 is
required to develop and implement a program to reduce the contamination of stormwater runoff and
prohibit illicit discharges. Operators of small MS4s are required to design their programs to reduce the
discharge of pollutants to the "maximum extent practicable." In Colorado, the program is administered
by the Colorado Department of Public Health & Environment (CDPHE) Water Quality Control Division.
(The Colorado program is referred to as the Colorado Discharge Permit System, or CDPS, instead of
NPDES.)
6.2.1 Designated MS4 Areas and Responsibilities
The MS4 mapped areas areof-reviewed annually by Weld County and are designated by CDPHE based on
population density. Currently, MS4 municipalities in Weld County include Greeley, Evans, Windsor,
Firestone, Erie, LaSalle, Brighton, Longmont, and a small portion of Northglenn and Thornton. As Weld
County continues to grow in population, each of these MS4 areas will continue to expand, potentially
encompassing urbanized parts of Frederick and Dacono.
The MS4 permit requires the County to implement a Construction Sites Program to prevent the
discharge of pollutants to the MS4 from applicable construction activities. The MS4 permit also requires
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 84
a Post -Construction Program to treat stormwater runoff from applicable development sites. These
responsibilities are handled through coordination between the departments of Planning and Public
Works.
6.2.2 Applicability of MS4 Requirements
The following section detaifs the two components in
The Department of Public W
6.2.2.1---rea of Disturbance
ity of MS4 requirements.
The MS4 Permit mandates specific requirements for construction activities resulting in a land
disturbance of greater than or equal to one (1) acre. The same requirements apply to land disturbance
that is less than one (1) acre but is part of a larger common plan of development or sale with a planned
disturbance of greater than or equal to one acre. For subdivisions, planned disturbance is equal to the
cumulative potential development area as specified by Chapter 23 of the Weld County Code and/or the
Master Drainage Plan for the subdivision, if more restrictive.
The MS4 Permit defines construction activity as ground -surface -disturbing activity, which includes, but is
not limited to, clearing; grading; excavation; demolition; and installation of new or improved haul roads,
access roads, staging areas, stockpiling of fill materials, and borrow areas. Activities that include routine
maintenance to maintain original line and grade, hydraulic capacity, or original purpose cf the facility
are not considered construction activities. Activities to conduct repairs that are not part of regular
maintenance and activities that are for replacement are considered construction activities and are not
considered routine maintenance. Repaving activities where underlying or surrounding soil is cleared,
graded, or excavated as part of the repaving operation are construction activities unless they are an
excluded site under Part I.E.4.a.i. of the permit.
6.2.3 Required Permits
6.2.3.1 CDPS Construction Stormwater Permit
When construction activities result in land disturbance of one (1) acre or more, or less than one acre but
part of a larger common plan of development, the owner and operator must obtain a CDPS Construction
Stormwater Permit, issued by CDPHE, prior to the start of land- disturbing activities. Under certain
conditions, an R -Factor waiver may be obtained from CDPHE.
As part of the permit, a Stormwater Management Plan (SWMP) must be kept onsite at all times.
Additionally, the site must have a Qualified Stormwater Manager (QSM), a person knowledgeable about
stormwater requirements and capable of implementing the SWMP in its entirety.
Refer to the CDPHE website for more information on the CDPS Construction Stormwater Permit, R -
Factor Waiver, and a SWMP preparation guidance document.
6.2.3.2 CDPS Construction Dewatering Permit
When construction activities require dewatering, the owner and operator must obtain a CDPS
Construction Dewatering Permit, issued by CDPHE, prior to the start of dewatering activities. Under
certain conditions, as specified in CDPHE's Low Risk Discharge Guidance for Discharges of
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 85
Uncontaminated Groundwater to Land, a dewatering permit may not be required. However, if the
dewatering activity is not complying with the guidance document and/or there is a threatened discharge
of pollutants to the MS4, the Department of Public Works will issue a Stop Work Order until a CDPS
Construction Dewatering Permit is obtained and the threatened discharge no longer exists.
Refer to the CDPHE website for more information on the CDPS Construction Dewatering Permit and
CDPHE's Low Risk Discharge Guidance for Discharges of Uncontaminated CDPHE's Low Risk Discharge
Guidance for Discharges of Uncontaminated Groundwater to LandGroundwater to Land.
6.2.3.3 Weld County Grading Permit
When construction activities will result in land disturbance of one acre or more, or less than one acre
but part of a larger common plan of development, the owner or operator must obtain a Grading Permit,
issued by Weld County Public Works, prior to the start of land -disturbing activities. In some cases, when
disturbing less than one acre within a developing subdivision, a Grading Permit may be required
depending on other construction activities in the area. Additionally, a Grading Permit may be required
for sites not located within the MS4 area but discharge into an MS4 drainage system. Exemptions to the
Grading Permit do not apply to properties located within the MS4 area, and variances to MS4
requirements will not be granted.
6.2.4 MS4 Requirements for Pre -Construction
As of July 1, 2019, theThe following requirements apply to any applicable development or construction
activity within the MS4 area. This includes the resubdivision of land since it is considered a "larger
common plan of development." The Department of Public Works will review each case and determine
the applicability of the site and if any exclusions are approved (see Post -Construction exclusions below).
6.2.4.1 Site Plan Review
The following documents shall be submitted, reviewed, and accepted by Public WorksWeld County staff
prior to any applicable construction activity requiring a Grading Permit. In addition, construction activity
not requiring a Grading Permit may be required to submit applicable documents if determined
necessary to comply with MS4 requirements.
6.2.4.2 Drainage Report
Drainage Reports shall be signed and stamped by a Colorado licensed Professional Engineer. A Drainage
Report Checklist, provided in Appendix B, should be completed and submitted with the report. The four
main components of the Drainage Report relating to MS4 requirements are:
a. General Content describing the nature of the development, basic characteristics of the site,
and proposed drainage improvements designed to comply with Weld County drainage and MS4
requirements. This includes specifying the MS4 "Base Design Standard" used in the design of the
permanent water quality control measure.
b. Hydrology and Hydraulic Analysis —including the calculations, narratives, and design details for
permanent structural control measures and associated drainage features to show compliance
with the MS4 Permit's "Base Design Standards."
c. Construction Drawings —detailing the existing and proposed drainage, permanent water quality
control measure(s) to be installed, and specifications for structural components.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 86
d. Long -Term Operations and Maintenance Plan for permanent water quality cortrol measures
and associated drainage features. The plan shall include frequencies of inspecticns and
maintenance and narratives for non-structural control measures, if applicable. Refer to USDCM
Volume 3 Chapter 6 for guidance on maintaining permanent water quality control measures.
When designing a permanent water quality control measure and developing maintenance procedures,
Public Works will conduct routine inspections for the life of the control measure to ensue proper
functioning and adequate maintenance is being performed. Inspections generally occur every year;
however, some sites may qualify for inspections every five years based on factors such as the control
measure type/design, facility type, pollutant load, and historical compliance. If there are no structural
components to visually confirm volume capacity, such as a concrete trickle channel, micro -pool, or
forebay, a survey conducted by a Professional Land Surveyor shall may be required.
Additionally, a Colorado licensed Professional Engineer \+ -shall provide confirmation of the existing
volume capacity meeting the approved Drainage Report calculations. The survey and report will be
submitted may be required to be submitted every five years for the life of the facility.
6.2.4.3 Grading and Sediment & Erosion Control Plans
Grading and Sediment & Erosion Control Plans shall be signed and stamped by a Colorado licensed
Professional Engineer. A Grading Permit Checklist, provided in Appendix G, should be used in developing
plans to expedite the review process. For details, refer to Section 6.1.
The main components of the Grading Plan and Sediment & Erosion Control Plan have been identified in
Section 6.1.2 above.
6.2.4.4 MS4 Pollution Prevention Plan
TheAn MS4 Pollution Prevention Plan Checklist and Manual is available -in Appendix H_, available on the
Public Works, Development Review webpage, The checklist shall -should _be completed and submitted
with the plan: The designer should note that if the checklist requirements are covered in the Grading
Plan and Sediment & Erosion Contra P an, a separate MS4 Pe ution Prevention P -an is not necessary.
Alternatively, the requirements can be met by s itti-ng the Storm water Management Plan that was
developed for the state issued Construction Sto-rmwater Permit. A Professional Engineer's stamp is not
required for MS4 Pollution Prevention Plans. The manual contains County -approved installation and
maintenance specifications for temporary control measures. Specifications for proprietary temporary
control measures, such as concrete washout structures and vehicle tracking pads, shall be submitted
and approved prior to use.
The MS4 Pollution Prevention Plan should Checklist and Manual was developed to help the Qualified
Stormwater Manager ;QSM) with implementation ofidentify, detail, -and locate all structural and non-
structural temporary control measures used during each phase of construction, from initi]l disturbance
to final stabilization, to prevent the discharge of pollutants from the site. Additionally, the plan will
includelt is the QSM's responsibility to identify all potential pollutants onsite and to implement
temporary control measures for each pollutant.
for each
ties listed shall be addressed in the plan. The
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X87
Attached to the checklist is a m-a�ua•I that can be submitted to fulfill the temporary control measure
insta ation specification anc na-rrative requirements M-ternative methods such as proprietary products
will be reviewed on a case by case basis.
A list of potential pollutants include:
• Vehicle tracking of sediments
• Land disturbance and storage of soils
• Loading and unloading operations
• Outdoor storage of construction site materials, building materials, fertilizers, and chemicals.
• Bulk storage of materials
• Vehicle/equipment maintenance and fueling
• Significant dust- or particulate -generating processes
• Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, and
oils
• Concrete truck/equipment washing, including the chute and associated fixtures and equipment
• Dedicated asphalt/concrete batch plants or masonry mixing station
• Waste sources such as sanitary waste, construction site waste, and worker trash
• Other non-stormwater discharges, including construction dewatering or power washing
• Other areas or operations where spills can occur (if so, specify)
above can be found in Chapter 7 of USDCM, Volume 3.
6.2.4.5 Future Development
For developments not requiring a Grading Permit, such as a re -subdivision of land or phased
construction sites, MS4 requirements remain applicable. If no land -disturbing activities are planned, the
applicant may only be required to submit a Drainage Report, including, but not limited to, the design of
a permanent water quality feature and associated drainage features and a Long -Term Operation and
Maintenance Plan. Upon commencement of land -disturbing activities, additional documents, such as a
Grading Plan, Sediment & Erosion Control Plan, and MS4 Pollution Prevention Plan will be required.
6.2.5 MS4 Requirements for Construction Activity
6.2.5.1 Stormwater Inspections
As required by the MS4 Permit, the County is required to routinely inspect construction sites at a
frequency of at least every 45 days. The Department of Public Works maintains the authority to increase
inspection frequencies based on historical violations.
It is the responsibility of the applicant to contact the Department of Public Works to schedule the first
inspection, at which time, the temporary control measures necessary to begin construction will be
inspected (I.e. perimeter control and vehicle tracking control). The applicant shall provide notice a
minimum of seven days prior to commencing construction activity. Failure to schedule an inspection is
considered a violation of MS4 requirements, and a stop work order or other enforcement actions may
be pursued.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 88
During routine inspections, the inspector shall review the current site conditions using the documents
submitted during the review process. Significant changes in plans may require modifications to be
submitted for approval. Minor changes should be noted in the Grading Plan and Sediment & Erosion
Control Plan, MS4 Pollution Prevention Plan, or SWMP, which are to be kept onsite at all times.
The inspector shall assess all onsite control measures, pollutant sources, and discharge points to
determine if an illicit discharge has occurred or has the potential to occur. If violations are found, the
applicant will be notified verbally, via email and/or certified mail, depending on the seve -ity of the
violations. . A compliance inspection than will be
scheduled no later than 14 days from the date of the violation.
If violations are not corrected by the time of the compliance inspection, and a schedule hr compliance
is not being followed, escalating enforcement procedures shall be followed until the site reaches
compliance. This may include a formal Notice of Violation (NOV),.-and the issuance of a Stop Work
Order;and holding all permits for the site for wh+cb all construction activity will cease until violations
have been corrected. If violations continue to exist, judicial enforcement responses may De pursued
depending on the severity and recalcitrance of the violations. Refer to the Enforcement section below.
Indicator (drive -by) inspections may be conducted at any time to assess site conditions: If the site
passes indicator inspecti-o-ns, routine inspecti-o�s may occur loss frequently. However, if violations are
found during indicator inspections, the applicant will be contacted to remedy the violations and to
schedule a follow-up compliance inspection.
When construction activity is completed, inspections shall occur at least every 90 days urtil the site has
reached final stabilization,— and all temporary control measures have been removed, and the CDPS
Construction Stormwater Permit has been terminated. If the contractor is no longer associated with the
site, the CDPS permit shall be transferred to the landowner, and the completed transfer shall be emailed
to Public Works. A final walkthrough will be performed to release the Grading Permit.
6.2.5.2 Construction Enforcement
Upon finding a stormwater violation that does not require emergency suspension, the inspector will
verbally inform the owner and/or operator of the necessary corrective action. If the viola:ion is
corrected during the inspection, no further action is required. For all remaining violations. an inspection
report will be made available to theernait the inspector will notify be send to the owner aid/or operator
detailing the required corrective actions, and a follow-up compliance inspection will be scheduled.
Depending on the severity of the violation, alternatives to the follow-up compliance inspection may be
allowed, such as submitting photos of the corrective action. When the site reaches compliance, the
routine inspection frequency will resume.
If violations were not corrected by the follow-up compliance inspection, an written NOV A4 will be
issued by certified mail, specifying a date by which compliance must be obtained to avoid further
enforcement action. . If corrective Ections are
found adequate during the compliance inspection, the routine inspection frequency will resume.
If the violations detailed in the NOV were not corrected by the specified date, additional NOVs may be
issued, in combination with additional enforcement actions, such as Stop Work Orders and placing holds
on permits.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF 89
If compliance is not being achieved through previous methods, the Department of Public Works may
decide to pursue an administrative entry and seizure warrant for abatement in addition to any potential
civil and/or criminal enforcement. A hearing with the BOCC will be scheduled to assess the costs of the
abatement, and these costs will become a lien against the property from which the causes of violation
have been remediated.
Additionally, the County may, without prior notice, seek the suspension of MS4 discharge access, such
as issuing a Stop Work Order, to stop an illicit discharge or threatened discharge which presents, or may
present, imminent and substantial danger to the environment, to the health or welfare of persons or to
any MS4 or waters of the state. If the violator fails to comply with a suspension order issued in an
emergency, the Department of Public Works may take such steps as deemed necessary to prevent or
minimize damage to any MS4 or waters of the state. The BOCC may assess the costs of the abatement
and such costs will become a lien against the property from which the causes of violation have been
remediated. A person commits an offense if the person reinstates access to the MS4 without prior
approval of the Department of Public Works.
For more information on enforcement procedures, refer to Weld County Code Section 8-9.
6.2.6 MS4 Requirements for Post Construction
When developing a site within the MS4 area, stormwater drainage shall be treated by use of a
permanent water quality control measure prior to discharging into any MS4. The MS4 Permit allows for
several exemptions; however, exemptions must be reviewed and accepted by Weld CountyPublic Works
staff prior to use.
6.2.6.1 Exemptions
The following exemptions are allowed in the MS4 area:
1. Large -Lot Single -Family Sites: A single-family residential lot, or agricultural zoned lands, greater
than or equal to 2.5 acres in size per dwelling and having a total lot impervious area of less than
10 percent. A total lot imperviousness greater than 10 percent may be allowed when a study
specific to the watershed demonstrates the expected soil and vegetation conditions are suitable
for infiltration/filtration of the WQCV for the site. The maximum total lot impervious covered
u nder this exclusion shall be 20 percent.
2. Undeveloped Land: Sites with land disturbance to undeveloped land land with no human -made
structures such as buildings or pavement) that will remain undeveloped.
3. Above Ground and Underground Utilities: Activities for installation or maintenance of
u nderground utilities or infrastructure that does not permanently alter the terrain, ground cover,
o r drainage patterns from those present prior to the construction activity. This exclusion includes,
but is not limited to, activities to install, replace, or maintain utilities under roadways or other
paved areas that return the surface to the same condition.
L Above Ground and Underground Utilities:
ance of underground utilities or infrastructure that do not
the construction activity. This exclusion i-r}clud-es, but is not limited to, activities to install,
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 90
replace, or maintain utilities under roadways of other paved areas that return tie surface to
the same condition.
2. Large Lot Single Family Sites:
s ≥ 2.5 acres in size per swelling and
imperviousness greater
typica
site, anc the permittee accepts suc
stucy as applicab
erec under t
its exc
e within its MS4 boundaries. T
usion wF
be 20 percent.
ie
This list contains the most common exemptions, but other exemptions are listed in the MS4 Permit and
may be allowed. All exemptions will be approved on a case -by -case basis.
6.2.6.2 Permanent Water Quality Control Measure Design
Permanent water quality control measures must meet at least one of the "Base Design Standards"
detailed in the MS4 Permit. No exemptions or variances to the standards are allowed for applicable
development within the MS4 area. For the purposes of this section, the "permittee" is the landowner.
The following italicized "Base Design Standards" were excerpted from the MS4 Permit, and all
references made can be found within that document. The entire permit is available on the CDPHE
website.
1. WQCV Standard
The control measure(s) is designed to provide treatment and/or infiltration of the WQCV end:
• 100 percent of the applicable development site is captured, except the permittee may exclude
up to 20 percent, not to exceed 1 acre of the applicable development site area when the
permittee has determined that it is not practicable to capture runoff from portions of the site
that will not drain towards control measures. In addition, the permittee must alsci determine
that the implementation of a separate control measure for that portion of the site is not
practicable (e.g., driveway access that drains directly to street).
• The exclusion of up to 20 percent of the site will be approved only in extreme cases when other
forms of treatment are infeasible. Use of this exclusion will not be approved if flows can be
diverted to the main permanent water quality control measure_ or a separate permanent water
quality control measure can be installed. It is the duty of the Engineer to demonstrate the
hardship and prove that alternative methods cannot be employed. Cost in this case is not
considered a hardship.
Evaluation of the minimum drain time shall be based on the pollutant removal mechanism and
functionality of the control measure implemented. Consideration of drain time shall include maintaining
vegetation necessary for operation of the control measure (e.g., wetland vegetation).
Most commonly, applicable development will require a detention pond, sized for the 100 -year storm
event and releasing within 72 hours, for flood control purposes. Detention ponds designed to current
standards and rainfall data meet the WQCV Standard. However, if the site drains to a detention pond
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 91
designed under previous standards and/or rainfall data that do not meet the WQCV Standard, a new
permanent water quality control measure is required. Additionally, a permanent water quality control
measure is required even if a site qualifies for an exception to detention.
In order to show compliance with this design standard, the plan must detail the percentage of the site is
being captured and treated by the permanent water quality control measure. If there are any excluded
areas proposed, a hardship must be demonstrated. Public Works will assess these on a case -by -case
basis.
Examples of permanent water quality control measures meeting the WQCV Standard include detention
ponds (with orifice plates), bioretention (with underdrains), and sand filters (with underdrains).
Calculations for the WQCV Standard can be found in the USDCM, Volume 3.
2. Runoff Reduction Standard
The control measure(s) is designed to infiltrate into the ground where site geology permits, evaporate, or
evapotranspire a quantity of water equal to 60 percent of what the calculated WQCV would be if all
impervious area for the applicable development site discharged without infiltration. This base design
standard can be met through practices such as green infrastructure. "Green infrastructure" generally
refers to control measures that use vegetation, soils, and natural processes or mimic natural processes to
manage storm water. Green infrastructure can be used in place of or in addition to low impact
development principles.
The Runoff Reduction Standard is most commonly used for sites qualifying for an exception to detention
or sites draining to a detention pond not which was not originally designed to meet the WQCV Standard.
Examples of permanent water quality control measures meeting the Runoff Reduction Standard include
grass swales, grass buffers, bioretention (full infiltration), and sand filters (full infiltration). Calculations
for the Runoff Reduction Standard can be found in the USDCM, Volume 3.
3. Applicable Development Site Draining to a Regional WQCV Control Measure
The regional WQCV control measure must be designed to accept the drainage from the applicable
development site. Stormwater from the site must not discharge to a water of the state before being
discharged to the regional WQCV control measure. The regional WQCV control measure must meet the
requirements of the WQCV Standard listed above.
The design engineer is encouraged to use guidance documents, spreadsheets and programs provided by
MHFD to assist in designing the BMPs. Other software programs may be used, but the designs will be
verified using the MHFD spreadsheets. The most current versions of MHFD spreadsheets can be
downloaded from the MHFD website at https://udfcd.orq/software.
Control measure technology is changing constantly. Weld County will evaluate the use of newly
developed control measures on a case -by -case basis when complete documentation of all assumptions
is provided. Weld County reserves the right to review alternative methods and compare with other
commonly used approaches, including those discussed in the USDCM.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 92
6.2.6.3 Certificate of Occupancy
Upon completion of the permanent water quality control measure, the applicant will submit an As -Built
Drawing, certified by a Colorado licensed Professional Engineer, of the permanent water quality control
measure and associated drainage features. An As -Built Drawing Checklist can be found cn the Public
Works, Development Review webpage or in Appendix D. Upon receiving the As -Built drawing, Public
Works will schedule an inspection of the permanent water quality control measure and associated
drainage features to visually confirm site conditions with the submitted drawing. If the inspector has no
concerns, the Certificate of Occupancy (CO) may be obtained. If not, the CO will be withheld until all
concerns are addressed. For redevelopment sites or sites in violation, an 'MS4 hold' will be placed on
the parcel, under which no permits will be issued until MS4 requirements are met.
6.2.6.4 Release from Grading Permit
A site reaches final stabilization when all construction, paving, and landscaping is complete, and uniform
vegetative coverpermanent stabilization has reached at least 70 percent permanent vegetative cover.
Upon achieving final stabilization of the site and release of the CDPS Construction Stormwater Permit, a
final inspection will be conducted to verify final site conditions with the previously submitted Site Plans
and As -Built Drawing. When confirmation is obtained, the site can be released from the Grading Permit.
If the inspector observes conditions other than in the approved documents, additional actions and/or
submittals may be required. Grading Permits may beare subject to a permit renewal fee after the first
6.2.6.5 Long -Term Inspections of Permanent Water Quality Control Measures
Permanent water quality control measures and associated drainage features will shall be routinely
maintained to function properly. Long-term operation and maintenance of the permanent water quality
control measure will be verified by an annual inspection or at a rate determined by Public Works staff,
not to exceed five years.
If the volume capacity of the permanent water quality control measure cannot be visually verified, such
as with a concrete trickle channel or other structural marker, Public Works may require a survey to be
completed by a Professional Land Surveyor. Confirmation of the volume capacity will be confirmed in a
report stamped by a Colorado licensed Professional Engineer. The survey and report will be
submittedmay be required every five years.
Upon change in ownership, the new landowner will be responsible for the proper operation and
maintenance of the control measure. O&M Plans may be updated at any time by contacti-ig the Public
Works Department.
6.2.6.6 Post -Construction Enforcement
When a violation is determined by an inspection, the owner will be notified either informally or formally
based on the severity of the violation. Informal notification may be verbally communicated, and or a
written notice will be sent, usually by email_, for reco-rdkeeping purposes. If corrective actions are made
within a reasonable amount of time, no further action is required. If corrective actions are not made
within an agreed -upon schedule, a formal NOV will be issued by certified mail. Additionally, an NOV may
be issued if violations are severe or occur repeatedly at the site. If corrective actions are not made
within the specified amount of time, the an 'MS4 hold' will be placed on the parcel. Additionally, a
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 193
hearing will may be scheduled with the BOCC. If an illicit discharge has occurred or will likely occur, the
Department of Public Works may take immediate action in cleaning up or preventing the contaminant
from discharging into the MS4. Specific details concerning enforcement can be found in the Weld
County Code.
6.2.7 MS4 Requirements for As -Built Drawing Checklist
The purpose of this checklist, provided in Appendix D, is to assist the applicant in submitting the
required As -Built Drawing for site drainage features (ponds, swales, inlets, outlet structures, spillways,
etc.) implemented within the MS4 area. This checklist is provided in Appendix D. As-Builts are typically a
red -lined copy of the original plans, clearly depicting all changes made in the field. Elevations shown in
the plans shall be verified through survey. Materials, dimensions, pond capacity and other aspects of
the design shall be verified by the engineer. Additional sheets may be added to the As -Built Drawings if
there is not enough room on the original plan.
6.3 REVEGETATION
Guidelines for revegetation in Weld County are provided in the Weed Management section of the Weld
County Public Works website. For more information regarding revegetation, refer to the Revegetation
chapter of the USDCM, Volume 2, and the Temporary and Permanent Seeding Fact Sheet (EC -2) of the
USDCM, Volume 3.
6.3.1 Site Preparation
An initial evaluation of site conditions is necessary for successful revegetation. Site preparation activities
should include, at a minimum:
• Initial hydrologic evaluation
• Initial weed evaluation and control
• Topsoil preservation (including existing wetland soil)
• Soil testing
• Soil amendment
• Seed bed preparation
• Tree protection
A list of noxious weeds is provided in Chapter 15, Article I of the Weld County Code. In the case that
noxious weeds exist onsite, the appropriate steps need to be taken before, during, and after work is
completed to control their spread.
Soil amendments may be needed to improve the existing soil conditions prior to revegetating the site.
Recommendations for soil amendments are provided in the Revegetation chapter of the USDCM,
Volume 2 and include, but are not limited to, fertilizers, compost, peat, humates, sulfur, gypsum, lime,
wood chips, and soil micro-organisms.
For disturbance of soils within the Weld County right-of-way, soils should be tested to determine
requirements for fertilizing and conditioning. Based upon the test results, hydraulic growth medium
(HGM) may be required. Contact Public Works for fertilizer and HGM requirements.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 94
6.3.2 Seeding and Planting
In addition to the site preparation guidelines outlined in the Revegetation chapter of the USDCM,
Volume 2, seed mixtures should be coated with Mycorrhiza at the rate of 2 pounds per Ecre at the time
of seeding. The Weed Management page of the Weld County Public Works website provides
recommended seed mixes for use within Weld County. The design engineer is encouraged to work with
Weld County Public Works in selecting a suitable seed mix.
The two applicable seeding styles in Weld County are drill seeding and broadcast seeding. Drill seeding
involves placing the seed in a firm seed bed just under the surface, which provides the best seed -to -soil
contact and yields higher success rates. Typical application for this method uses 11 pounds to 14 pounds
of pure live seed (pis) per acre. Broadcast seeding involves placing the seed directly to the surface of the
soil, and typically uses 20 pounds to 24 pounds pls per acre. Ideal seeding dates are frorr April 1, or
spring thaw, to June 15 and from September 15 until consistent ground freeze for non-ir-igated areas.
Winter and early spring seeding should not be conducted if the soil is frozen, snow covered, or wet
(muddy). Hydro -seeding will be approved by Weld County only on a case -by -case basis. In order for a
project to come to completion, it will be required that the project site achieve 70% plant density during
full growing season.
6.3.3 Mulching
Mulching is the practice of applying a protective layer of material onto the soil surface of plantings or a
seeded area. Mulching may be achieved through straw or rolled erosion control product (RECP)
installations. If mulching with straw, the straw must be certified weed -free. Mulching wil not be
conducted in wetland areas. Hydromulch will be approved only on a case -by -case basis.
6.3.4 Maintenance
A maintenance and management plan should be established for each project to ensure successful
revegetation post -construction. Recommended maintenance activities include, but are not limited to:
• Weed control and long-term management
• Reseeding bare areas where grasses did not establish
• Repairing erosion control fabrics, if applicable
• Stabilizing eroded areas, particularly following large storm events
• Installing protection from animal damage
• Temporary or permanent irrigation, as needed
• Removing debris
• Installing and/or repairing temporary fencing to control foot traffic, particularly in heavily used
park areas
Wetland areas usually require specific post -construction monitoring as part of the Clean Water Act
Section 404 permitting process. These requirements should be coordinated with Weld County Public
Works. Refer to the Revegetation chapter of the USDCM, Volume 2 for more information.
The property owner/developer is fully responsible for site maintenance and revegetation.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 95
6.3.5 Erosion Protection Design Criteria
Protecting major drainage channels from erosion is critical for maintaining channel stability. Channels
need to be designed so that they remain stable until they are fully constructed or vegetated. It may be
necessary to install riprap, straw bales, erosion control logs, or erosion control blankets in the channels
to ensure that they remain stable. The BMPs outlined in the USDCM, Volume 3, shall be used to ensure
stability.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 96
CHAPTER 7 FEMA FLOODPLAIN REQUIREMENTS
For All any construction development, as defined by FEMA, in a floodplainshall comply with, all
applicable floodplain regulations and codes apply, including the need to submit a CLOMF. and a LOMR to
FEMA for review and acceptance if applicable. For more information regarding floodplain regulations,
refer to Chapter 23, Article XI, of the Weld County Code; the 2011 2022 Colorado Water :onservation
Board (CWCB)
Rules and Regulations for Regulatory Floodplains in Colorado
; and Title 44 Code of
Federal Regulations ;CFR 59, 60, and 65 of the FEMA's I (NFIP)
regulations.
Floodplain-related work will be reviewed by the Weld County Planning Department of Planning Services
and a permit will be issued for all compliant submittals. the Weld County Floodpla-in A-drrinistrator. For
more information regarding floodplain modeling and mapping requirements refer to FEMA's Guidance
for FEMA's Risk Mapping, Assessment and Planning. Guidelines a-r+d Specifications for Flood Hazard
Mapping Partners.
7.1 BACKGROUND INFORMATION
Weld County is a participant in FEMA's National Flood Insurance Program (NFIP) therefore. As a
participant in the NAP, Weld County is responsible for ensuring that floodplain regulations per FEMA,
the state of Colorado, and Weld County are administered. Failure to administer
the floodplain regulations can result in the suspension of Weld County from the NFIP. Suspension from
the NFIP results in the inability of Weld County residents to obtain flood insurance and the suspension
of disaster assistance funding from FEMA in the event of a natural disaster.
7.2 FLOODPLAIN MANAGEMENT OBLIGATIONS
Weld County has several cases that govern many of the requirements set forth in this WCECC:
• The boundaries of the floodplain should be accurately determined and based on a reasonable
standard. Mallett v. Mamarooneck, 125 N.E. 2d 875 (N.Y. 1955).
• Adoption of a floodplain regulation to regulate flood -prone areas is a valid exercise of police
power and is not a taking as long as the regulation does not go beyond protection of the public's
health, safety, morals, and welfare. Hermanson v. Board of County Commissioners of Fremont,
595 P.2d 694 (Colo. App. 1979).
• The adoption by a municipality of floodplain ordinances to regulate flood -prone areas is a valid
exercise of police power and is not a taking. Morrison v. City of Aurora, 745 P.2d 1042 (Colo.
App. 1987).
7.3 FEMA FLOODPLAINS
There are several hundred square miles of FEMA mapped floodplains in Weld County. Refer to the Flood
Insurance Rate Maps (FIRMs) that are published by
FEMA to determine if a proposed project is located within a mapped floodplain. The floodplain maps can
be obtained from the FEMA Flood Map Service Center and the floodplain boundaries are depicted on
the Property Portal Map maintained by Weld County. The Weld County Department of Planning Services
and Zoning Department should be contacted to determine if there have been any LOMRs or other
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 97
changes to the floodplain boundaries that have been approved by FEMA for the affect the proposed
project area.
7.3.1 Floodplain Requirements
All development, as defined by FEMA requires a Floodplain Permit (FP) or Floodplain Development
Permit (FHDP) from Weld County. The applications can be found on Weld County's Planning and Zoning
website. Contact the Weld County Department of Planning Servicesand Zoning to determine which
application is required. The designer should also should be aware that the CWCB requires a CLOMR and
LOMR should there be are required if there is an increase greater than 0.00 feet or a decrease in WSEL
greater than 0.3 feet in regulatory floodwaysplains. A CLOMR and a LOMR are also required if there is an
increase or a decrease greater than 0.3 feet in the WSEL in regulatory floodplains.
Sections 4.7 and 5.7 of this WCECC discuss the criteria for constructing hydraulic structures within an
open channel. All design engineering of the hydraulic structures must follow accepted FEMA
methodology. Construction of hydraulic structures within FEMA floodplains must not increase the 100
WSEL for Zone A or Zone AE. Per FEMA regulations, a Floodplain Development Permit (FHDP) shall
be required for the construction of channels and other major drainage system components within the
FEMA mapped 100 year floodplain. It may be necessary to submit to FEM-A a CLOMR and a LOMR
followed by a LOMR to FEMA as part of the development process.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 98
CHAPTER 8 TRAFFIC CRITERIA
This Chapter discusses the requirements for developing and submitting Traffic Impact St_idies, traffic
control devices, access to county roads, access design, auxiliary lane requirements, access construction
within County right-of-way, and tracking control standards.
8.1 TRAFFIC IMPACT STUDIES
A Traffic Impact Study (TIS) is required to analyze the effects of a proposed development or other land
use action on the transportation system to determine if adequate public facilities exist tU serve the
proposed development, and to clearly identify any improvements required to mitigate the impacts on
the transportation system.
When a plan for development or redevelopment is submitted, the applicant is responsib e for assessing
the traffic impacts of the additional traffic to the surrounding transportation system under existing
(current), short-range and long-range horizons.
If a project is adjacent to a road that is under the jurisdiction of another entity (CDOT, City, Town, or
adjacent County), the applicant is responsible for contacting that entity to determine the traffic analysis
and access approvals that may be required. Any proposed access to a State Highway will require a CDOT
Access Permit and direct coordination with CDOT.
8.1.1 Traffic Impact Study Area
Traffic impacts shall be analyzed within the traffic impact area. The determination of a traffic impact
area is done on a case -by -case basis; however, at a minimum the limits of the study should include:
1. Internal roads.
2. Adjacent roads.
3. Access locations and/or new intersections.
4. Off -site roads to the nearest paved County collector or arterial road or state high Nay.
5. Off -site roads where traffic from the proposed development or land use action will account for
at least 20 percent of the average daily traffic upon build -out.
6. Off -site intersections where traffic from the proposed development or land use action:
a. Contributes a 10 -percent impact of the peak hour traffic on any approach leg of an
intersection where the intersection is operating at a level of service (LOS) C or better
upon build -out.
b. Contributes a 5 -percent impact of the peak hour traffic on any approach leg of an
intersection where the intersection is operating at a LOS D or worse upor build -out.
c. Impacts a specific turning movement that currently does not have an aux liary turn lane
by at least 50 percent of the peak hour volume warrant for an auxiliary turn lane.
8.1.2 Preliminary Traffic Impact Analysis
A preliminary traffic impact analysis (traffic narrative) shall be submitted with every project application
for the application to be considered complete. The intent of the analysis is to determine tie project's
cumulative development impacts, appropriate project mitigation and improvements necessary to offset
a specific project's impacts. This analysis shall include the following information:
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 99
1. Describe how many roundtrips/day are expected for each vehicle type: Passenger Cars/Pickups,
Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = One trip in and One trip out of a site).
2. Describe the expected travel routes or haul routes for site traffic.
3. Describe the travel distribution along the routes (e.g. 50 percent of traffic will come from the
north, 20 percent from the south, 30 percent from the east, etc.).
4. Describe the time of day that you expect the highest traffic volumes.
Public Works will review the narrative and advise the applicant if more information or an engineered
traffic impact study is required.
8.1.3 Traffic Impact Study Requirements
A full TIS is required for any proposed development or land use zoned Commercial or Industrial, any
residential subdivision greater than nine (9) lots, or when determined necessary by the Engineer. The TIS
should address impacts to on -site and off -site roadways and highways within the County and shall be
prepared, stamped, and signed by a Professional Engineer licensed in the state of Colorado. The TIS shall
include, at a minimum, the following information:
1. Describe the traffic impact area, including at a minimum those elements described in the traffic
impact study area section of this document.
2. A location map showing the development site, the boundaries of the traffic impact area, and all
roads, intersections, bridges, or other roadway structures in the traffic impact area.
3. Define the following study horizons for the Full Traffic Impact Study: the existing (current),
short- range, and long-range horizons.
a. Existing Horizon: The intent is to establish a baseline traffic condition.
b. Short -Range Horizon: The intent is to evaluate the immediate impacts of the project on
the transportation system. The short-range horizon year is defined as the point of full
buildout of the proposed development or land use action. If the project is proposed to
o ccur over multiple phases, the impacts shall be analyzed at the point of full buildout of
e ach phase. In no case shall the short-range horizon exceed five (5) years.
c. Long -Range Horizon: The intent is to evaluate the impacts of the fully developed project
in the context of regional transportation planning efforts. The long-range impacts are
analyzed as of the end of the current Regional Transportation Plan 20 -year planning
horizon.
4. Identify the existing, approved, and proposed land uses within the traffic impact area.
5. Describe existing traffic conditions within the traffic impact area, including average daily traffic
volumes for roadways and impacted intersections and a.m. and p.m. peak hour levels of service
for intersections.
a. Existing daily traffic data must be obtained from the Department of Public Works. If the
data are not available for the area in question or data is outdated (older than 24 months
for daily counts or 12 months for intersection counts), then the designer may obtain
n ew traffic data. Daily traffic counts must be collected over a 72 -hour period starting on
a Tuesday and ending on a Thursday of a normal week, excluding any holidays or events
that may skew results. Daily traffic counts must have been collected within the past 24
months. Intersection turning movement counts must be collected for at least two hours
each of the morning and evening peak hours of a typical weekday (Tuesday,
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1_00
Wednesday, or Thursday) and must have been collected within the past 12 months.
Existing daily roadway and intersection peak hour traffic counts must be included for
the study area. Any traffic counts collected for the study should be included in Appendix
I
6. For short-range traffic projections, provide references, calculations, and data sources for all trip
generation estimates. The trip generation results shall be shown in a table with the following
information:
a. Land Use
b. Unit of Measurement (for example, per dwelling unit, per 1,000 s.f, sq. f_., etc.)
c. Total number of units
d. Trip generation rates per unit for average daily traffic and peak hour volumes
e. Total number of trips generated for average daily traffic and a.m. and p.m. peak hours
7. Short-range and long-range traffic projections must also include forecasts for the growth in
background traffic
8. Provide trip distribution estimates for the roads and intersections in the traffic impact area
based on the following:
Tables in the report need to show the trip generation rates used, based on the rr ost recent
version of the Institute of Transportation Engineer's Trip Generation Manual.
If no Trip Generation Manual information is available, the site -specific number of trips can be
calculated based on the number of employee trips for each shift time, number of deliveries,
additional trips entering/exiting, and other applicable trips that may enter and exit the site
throughout a typical day.
a. Vehicle Types
The number or percentage of anticipated trucks should be included in the trip
generation. In the analysis, a Passenger Car Equivalent (PCE) should be used to account
for slower -moving trucks in the traffic stream. The procedures for converting trucks to
PCEs can be found in the latest edition of TRB's Highway Capacity Manual or in the
CDOT State Highway Access Code.
If a haul route is associated with the development, the route should be called out in the
report.
b. Trip Distribution
The directional analysis for the site -generated traffic should be presented clearly. If
internal trip reductions or pass -by trips are used in the calculations, they must be clearly
documented.
c. Total Proposed Volumes
The total proposed trips and corresponding turning movement counts should be clearly
shown for both the short-range horizon (project opening year) and for the long-range
horizon (20 -year planning horizon).
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 0,01
9. Present the volumes for short-range and long-range traffic including the projected traffic for the
proposed development or land use action for the a.m. and p.m. peak hour and average daily
conditions. These volumes must include turning movements at intersections as well as volumes
for roads in the traffic impact area.
10. Analyze the adequacy of the transportation system to handle the projected traffic for short-
range and long-range planning years. Key elements in this analysis should include:
a. Generalized daily traffic volume level of service for roadways and intersection levels of
service for a.m. and p.m. peak hours, based on the following guidance:
The LOS must be analyzed at each intersection within the study area. For unsignalized
intersections, the worst -movement approach must be reported. The County has
e stablished LOS C as the minimum acceptable threshold at both signalized and
u nsignalized intersections. If LOS C cannot be achieved in the existing, opening year, or
horizon year analysis, mitigation should be recommended and documented.
The existing peak hour LOS and delay calculations should be based on the procedures
o utlined in the latest edition of the TRB's Highway Capacity Manual. Typically, the
weekday morning and evening peak hour will be used for analysis, but if the site's peak
hours are anticipated at other times of day, the proposed peak hours of analysis should
be approved by the County.
The following traffic analysis scenarios must be included:
• Existing (Current) Year, without project
• Short -Range Analysis, Project Opening Year with Project Traffic
• Long -Range Analysis (20 -year planning horizon) without Project (Background Traffic)
• Long -Range Analysis (20 -year planning horizon) with Project
If the project is proposed to open in phases, the analysis of multiple opening year
scenarios may be required. An additional Background Traffic Project Opening Year
scenario may be required if background traffic volumes are anticipated to be
significantly higher than under Existing Year conditions.
Each analysis scenario should be presented clearly, with graphics showing the proposed
access locations, assumptions used for trip distribution, trip assignment, intersection
turning movements, daily traffic volumes, and LOS. Any existing or background
intersection or roadway operational and geometric deficiencies in the study area should
be clearly noted.
b. The appropriateness of access locations and if necessary, a traffic signal warrant
analysis.
Requirements for access spacing are included in Section 8.5. All existing and proposed
intersections within the study area should be assessed to determine if spacing criteria
are met.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 102
f an intersection within the study area may be signalized, a traffic signa warrant
a
nalysis should be performed based on the warrant criteria in the latest edition of the
MUTCD. Both the opening year and horizon year conditions should be evaluated to
determine if the intersection may meet warrants.
The need for auxiliary lanes (turn lanes, deceleration, and acceleration lanes), including
explanations of how acceleration/deceleration lengths, storage lengths, and taper
lengths were determined.
Requirements for auxiliary lanes are included in Section 8.7 and are based on the CDOT
State Highway Access Code Rural Highway (Category R -B) classification requirements. If
the roadway has characteristics differing from a Rural Highway, the designer should
refer to the Access Code to utilize a more appropriate classification to calculate auxiliary
lane needs. All intersections and site access points within the study area should be
evaluated to determine if auxiliary lane warrants are met. If auxiliary lanes are in place,
the study should determine if the storage length, taper length, and
deceleration/acceleration lane distances meet minimum requirements with the added
site traffic.
d. Sight Distance
All site accesses should be evaluated to ensure sight distance minimum requirements
are met based on the requirements in Section 8.6. If applicable, the study should
evaluate if changes to passing zones are recommended in the vicinity of :he site due to
the proposed development.
e. Crash History
A crash history and safety analysis may be required if the site is proposed to access a
location where the County has identified a safety concern. Consultants may need to
purchase third -party software, such as DiExSys, to analyze the safety per'ormance
functions of a location based on existing and proposed new traffic. If a location is found
to perform at a level of service of safety greater than 3, then improvemeits must be
determined to reduce the level of service of safety. Weld County will accept locations
that have a level of service of safety of 1, 2, or 3.
f. Sites Accessing Gravel Roads
g.
If the site is proposed to access gravel roads, an assessment should be performed to
determine if development of the site requires consideration of paving the road. See
Section 8.9 for Tracking Control requirements.
Parking Needs
For non-residential development, ensure that the site has adequate on -site or on -street
parking available.
h. Safe Routes to School and/or School Bus Stops
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 103
For residential development, identify existing or proposed school bus stops within the
study area, existing and proposed sidewalks, and note any deficiencies and proposed
improvements.
i. Access to Public Transit
If there is public transit within the study limits, identify accessibility to public transit and
safe pedestrian/bicycle access to the nearest transit stop within half a mile of the
project site.
j.
Haul Route
If applicable, the site's proposed haul route should be identified. Any deficiencies along
the haul route (such as pavement, bridge deficiencies, etc.) must be called out along the
haul route, even if it is outside of the project study area.
11. Provide a summary of conclusions and recommendations from the full Traffic Impact Study,
including at least the following items:
a. A summary listing of traffic impacts from the proposed development on existing and
proposed roads and intersections within the traffic impact area.
b. A summary listing of the improvements needed to assure adequate service and safety
levels on the roadway system affected by the proposed development, identify and
describe each proposed improvement, how and when it will be funded, and expected
completion dates.
i The TIS should clearly state recommended improvements to the site accesses,
intersections, and roadway system for the short-range and long-range years.
Include any auxiliary lane recommendations, modifications to existing storage
bay lengths, intersections recommended to be signalized, proposed turning
restrictions at intersections or access points, modifications to roadway surface,
or improvements required along the roadway.
ii. An updated LOS analysis should be performed where mitigation is
recommended to ensure that acceptable operations can be achieved for both
short-range and long-range conditions.
iii. Identify and describe each proposed improvement, how and when it will be
funded, and expected completion dates.
12. Any reasonable additional information deemed necessary for review —special considerations.
Public Works will review the TIS and advise the applicant if more information is needed or
provide technical comments on the submittal.
8.1.4 Traffic Impact Study Checklist
A stand-alone checklist will be provided to developers along with the Pre -Submittal Requirements
packet and found in Appendix I of this document.
8.1.5 Updating Existing Traffic Impact Studies
The following scenarios will require the preparation of an update (or amendment) to a previous study,
or the preparation of an entirely new study.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1104
1 When the time or circumstances of the original study fall within the parameters presented in
Table 8-1, the applicant shall prepare the appropriate documentation identified in Table 8-1
2 When the original study was prepared for a large, complex, or phased project and was designed,
organized, and written to function as a "base" or master plan document for future development
applications, it must include updates to the County comprehensive plan (These types of studies
require scoping consultation with the County prior to their preparation )
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1105
Table 8-1 Updating eaan Existing TIS
Changes
to the
Original
Development
Original
Report
is:
Access
increased
changed,
by 15%
or trip
or more
generation
Access
not
did
increase
not
change,
by
and trip
15% or more
generation did
< 2 years old
Amendment
discuss
only
letter:
items
that
identify
changed
and
Letter
service
(No
other
documenting
traffic
requirements)
change;
include
level
of
> 2 years old
New
study
Amendment
•
•
•
•
Updated
taken
Revised
Revised
Meet
letter,
over
all
traffic
trip
LOS
current
including:
72
g
analysis
counts
hours)
eneration
TIS
(daily
requirements
counts
8.2 CHANGE IN ACCESS USE
If the use of an existing access to County right-of-way changes or there is a change in the use of the
property, a new Access Permit will be required, in accordance with Chapter 8, Article 14 of the Weld
County Code. Change in access or property use may include, but is not limited to, change in the amount
or type of traffic, structural modification, remodeling, change in use or type of business, expansion of
existing business, change in zoning, change in property division, and creation of new parcels.
8.3 TEMPORARY ACCESS
Any road access that will be closed after being used for a limited time may be considered a temporary
road access, or a road that will be temporarily used for a different purpose may be considered a
temporary upgrade in use. The time in use of temporary accesses will not exceed 18 months. A
Temporary Access Permit may be granted only if the temporary access meets minimum County traffic
safety and operational requirements (Weld County Code Sec. 8- 14-10, et seq), including sight distance
and tracking control that is discussed in further detail in Section Error! Reference source not found..
For a Temporary Upgrade in Use Access Permit, the access must meet prior use standards and
regulations including use, width, and turning radii after the permit expires.
8.4 TRAFFIC CONTROL DEVICES AND PLANS
All road signs, striping, delineators, barricades, signals, and other traffic control devices will conform to
the most current edition of MUTCD and any applicable Colorado supplement, as amended. The
applicant will be required to install all necessary signage and will bear all expenses for the fabrication
and installation of road name signs, permanent barricades, and signs for implementing the approved
project design (e.g., one way, no parking, no outlet, stop sign, speed limit). Necessary signage will
include signs required on County roads as a consequence of the applicant's project, such as regulatory,
guide, or warning signs. Signs and barricades will be in place prior to road acceptance.
8.4.1 Signage and Striping Plans
All road improvement and/or land development projects must incorporate a separate signage and
striping plan in accordance with the criteria of this section. Striping plans may not be required for local
subdivision roads. However, sign plans are still required for all subdivisions. All signing and striping plans
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1106
will conform to the most current edition of the MUTCD. All traffic control devices will be fabricated and
installed in accordance with the MUTCD. Permanent signage and striping will be complete and in place
before any new roadway is opened to the public for use.
8.4.1.1 Signage Plan Elements
1. Show the general longitudinal location of each sign (horizontal offset and station).
2. Specify the sign legend and sign type.
3. Specify the sign size.
8.4.1.2 Striping Plan Elements
1. Include stripe color and type.
2. Include lane width, taper lengths, storage lengths, etc.
3. Include striping/skip interval.
4. All permanent pavement marking materials, except point location markings, must meet current
CDOT specifications for thermoplastic traffic marking paint unless another material is specified
by the engineer and approved by the County.
5. All point location markings (stop bars, turn arrows, words, symbols, etc.) must meet
specifications.
6. Include station and offset or dimensions for all angle points, symbol locations, and line
terminations.
7. Include stripe dimensions.
8. Delineate raised median islands.
8.4.2 Striping guidance
A stop line (stop bar) should be placed a minimum of 4 feet in advance of the nearest crosswalk line at
controlled intersections. In the absence of a marked crosswalk, the stop line should be placed at the
desired stopping point but should not be placed more than 30 feet or less than 4 feet from the nearest
edge of the intersecting traveled way. Preferred distance is 10-12 feet from edge of traveled way.
8.4.3 Type and Location of Signs
The Department of Public Works will make the final determination regarding the type and location of
traffic control devices within the right-of-way or access easement. These controls will include traffic
control signs, road name signs, delineators, and permanent barricades.
8.4.4 New Roadway Signage
Permanent signage, unless otherwise approved by the Department of Public Works, will ke installed
before any new road or access easement is opened for use.
8.4.5 Memorial Sign Applications
A memorial sign must be requested by the victim's family or another sponsor with the consent of the
victim's family, in accordance with Weld County Code, Chapter 8, Article VI, Sec. 8-6-180. Upon
submittal of a Roadside Memorial Sign Application with fee to the Weld County Public Works
Department, Public Works will review the application for acceptance. See also Appendix 8-L and 8-M of
the Weld County Code.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 1O7
8.4.6 Construction Criteria
Refer to Section 10.9.1 and Section 10.9.2 for more -detailed information on construction criteria of
pavement marking and traffic control devices.
8.5 ACCESS POINTS
The Weld County Code defines an access as the place, means. or way vehicles or pedestrians shall have
safe, adequate and legal ingress and egress to a lot, trail, open space, off-street parking space or use.
Weld County recognizes that property owners have a right of reasonable access to the County road
system. However, within an environment where population growth will increase traffic volumes and
operational pressure on the general transportation system, be it rural or urban, access control is crucial
to protect the public health, safety, and welfare. Access control is used to maintain smooth traffic flow,
to provide road right-of-way drainage, and to protect the functional level of the County roads while
meeting state, regional, local, and private transportation needs and interests. Weld County Code Sec. 8-
14-10, et seq., contains the County's Road Access Policy. Also refer to the Weld County Functional
Classification Map and Transportation Plan, available on the County's Transportation Planning webpage.
An access permit application must be submitted for any new proposed access to a County -maintained
road. If a property is proposed to directly access a State Highway, access must be approved and
obtained by CDOT as described in Section 8.3.1.1.a. If a property is proposed to directly access a road
under the jurisdiction of a local municipality, access must be approved and obtained by the local
municipality.
If a property has frontage on two roads, it is recommended access should be obtained from the lower
volume road when possible.
Intersection and aAccess spacing criteria (as measured from centerline to centerline right _et _way to
right _of _way) for local roads, collector roads, and arterial roads are shown in Table 8-2.
Table 8-2 Minimum Intersection & Access Spacing Criteria (feet)
Arterial
Collector
Local
Access Element
Distance
Signalized
Unsignalized
between
intersections
2,640
1,320
1,320
N/A
N/A
330
Distance
between
access
points and
intersections
660
660
330
Distance
between access
points
660
330
150
Distance
between
access
points
in Subdivisions
N/A
N/A
75
If design criteria cannot be met for auxiliary lane requirements or if an operational threshold of LOS C
cannot be maintained, the proposed access may be approved as restricted movement, as described in
Section 8.5.6.
8.5.1 Local Roadways
Access standards to local roadways will be governed by Weld County recognizinges that property
owners have a right of reasonable access to the County road system. However, within an environment
where population growth will increase traffic volumes and operational pressure on the general
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE: I 108
transportation system, be it rural or urban, access control is crucial to protect the public health, safety,
and welfare.
Access control is used to maintain smooth traffic flow, to provide road right-of-way drainage, and to
protect the functional level of the County roads while meeting state, regional, local, and private
transportation needs and interests. Weld County Code Sec. 8-14-10, et seq., contains the County's Road
Access Policy. Also refer to the Weld County Functional Classification Map and Transportation Plan,
available on the County's Transportation Planning webpage.
Whenever possible, shared accesses will be given priority.
8.5.2 Collector Roadways
Access standards to collectors are shown in Table 8-2. An access or new intersection onto a collector is
not permitted unless it meets the spacing requirements in Table 8-2 and an alternative a:cess or
intersection to a lower classified road is not feasible. No more than one access will be allowed to an
individual or to contiguous parcels under the same ownership unless it can be shown that the additional
access would not be in conflict with local safety regulations; the additional access would not be
detrimental to public health, safety, and welfare; and the additional access is necessary fir the efficient
use of the property.
8.5.3 Arterial Roadways
Access standards onto arterial roadways are shown in Table 8-2. An access or new intersection onto an
arterial is not permitted unless an access/intersection to a lower classified road is not feasible and the
proposed access meets the spacing requirements in Table 8-2 and does not interfere with the location,
planning, and operation of the general street system or access to nearby properties. Whenever possible,
shared accesses will be given priority. No more than one access will be allowed to an individual or to
contiguous parcels under the same ownership unless it can be shown that allowing only tine access
would be in conflict with local safety regulations; the additional access would not be detr mental to
public health, safety, and welfare; and the additional access is necessary for the efficient .use of the
property. Intersections will be spaced no less than one -quarter mile apart on arterials, unless such
spacing is impractical or impossible due to topographic or other physical limitations as determined by
the Department of Public Works. The type of access —full movement, three-quarter movement, or right-
in/right-out movement —will be determined by the Department of Public Works.
8.5.4 State Highway and Interstate Systems
CDOT and FHWA rules and regulations will apply to all highway and interstate accesses. Weld County
takes no jurisdictional authority over access onto a highway or interstate.
8.5.5 Shared Accesses
Whenever possible and feasible, shared access will be provided to serve two or more adjacent
properties. A sShared access is to be centered on the common property line. For shared a:cesses, the
Public Works DepartmentCounty strongly recommends the property owner establish a written access
road maintenance agreement so future owners of the properties will be aware of their requirements for
shared maintenance of the access road. Shared access and utility easements shall be a minimum of 30
feet wide and shall contain a minimum 20 -foot -wide, all-weather roadway.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE � 109
8.5.6 Restricted Movement Access
If the minimum spacing criteria cannot be met, or if the minimum level of service threshold of LOS C
cannot be achieved, the County may require that the movements at an access be restricted to ensure
traffic safety. The following types of access are most common:
1. Full movement access. All potential movements for the access are allowed.
2. Three-quarter access. All movements are allowed except a left turn out of the access.
3. Right-in/right-out access. Only right turn in and right turn out movements are allowed.
8.5.7 Access Control Plans
On corridors with an adopted Access Control Plan in effect, recommendations for each existing and
future access location and policies that guide future access management efforts will be enforced.
8.6 ACCESS DESIGN
Access points will be designed to provide safe movement for traffic entering and traveling on roadways
within the County. Like intersections, access points are conflict locations. The basic design of access
points includes adequate spacing, proper alignments, and clear sight distances.
8.6.1 Geometric Design
Accesses shall enter onto Weld County roads at an 80- to 100 -degree angle, for a minimum of one
vehicle length. An access approach that is gated will be designed so that the longest vehicle (including
trailers) using the access can completely clear the traveled way when the gate is closed. In no event will
the distance from the gate to the edge of the traveled surface be less than 35 feet. Any overhead entry
structures shall have at least a 14 -foot, 6 -inch clearance, measured from the access surface. When the
access is intended for commercial or industrial use, the access radii shall accommodate the turning
movements of anticipated vehicle types. AutoturnTURN exhibits may be required by the County if there
is a safety or operational concern. Table 8-3 shows the access width and access radii for properties
based on land use.
Table 8-3 Access Geometry
Type
of
Land
Use
Maximum
Access Width
at ROW
Access Radii
Single-family
residential
24
feet wide
25
feet minimum
Commercial/Industrial/Agricultural
40
feet wide
65
feet minimum
Fill slopes and cut slopes will be constructed to match the slopes of the existing County road adjacent to
the maximum access width as identified at the ROW line. It is desirable that all side slopes be no steeper
than 4:1 (H:V). Drainage culverts are required for new access points unless otherwise approved by the
County. Minimum required size is a 15 -inch aluminized CMP or RCP. See Section 5.8.3 of this document
for allowable culvert types. Minimum cover requirement will be 12 inches above the pipe crown to the
bottom of asphalt at the edge of pavement (for paved roads) and a minimum of 12 inches of cover
above the pipe crown to the top of the finished grade (for gravel roads). All culverts should be sized to
convey the flow water based on the existing capacity of the ditch and meet the HW/D requirements
specified in Chapter 5 of this document. Figure 8-1 shows a typical access approach. Dimensions of
radius and access width should be determined by Table 8-3, above.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 110
Figure 8-1 Access Approach
15" MINIMUM
DIA. CULVERT
RADIUS
I
ACCESS WIDTH
`ti WELD COUNTY ROAD
-4/1
FLARED END
SECTIONS
RIGHT OF WAY
FLOW LINE
SHOULDER
EDGEOFTRAVEL-LANE
8.6.2 Access Sight Distance
Accesses are stop controlled so the access sight distance discussed in this section is the distance
required for vehicles to enter traffic and accelerate to the average running speed. There shall be an
unobstructed sight distance along both approaches and both sides at an access (within the right-of-way)
for distances sufficient to allow the operators of vehicles that are approaching simultaneously to see
each other in time to prevent collisions at the access. All clear sight triangles must be within the public
right of wayright-of-way or a sight distance easement. See also Figure 8-2.
Distance a, in Figure 8-2 is equal to distance al plus the width of the lane(s) departing from the
intersection on the major road to the right. Distance a2 also should include the width of any median
present on the major road. The appropriate measurement of distance al and distance az or departure
sight triangles depends on the placement of any marked stop line that may be present and, thus, may
vary with site -specific conditions. In Weld County, the typical distance behind the traveled way to the
stop bar is 14 feet.
b = 1.47Vmajortg Eq. 8.6.1
b = Access Sight Distance (see Figure 8-2)
Vmaor= Design Speed of major road (MPH)
t= time gap needed for vehicle entering major road (sec)
til = 7.5 Car, 9.5 Single -Unit Truck, 11.5 Combo -Unit Truck
Adjust tgfor crossing more than 2 lanes:
+0.5/extra lane for cars
+0.7/extra lane for trucks
Also adjust tfor starting grade of the vehicle if it exceeds 3%
+0.2 sec/percent grade for cars and trucks (only for starting uphill)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 111
Weld County Rd
The value calculated should be rounded up to the nearest 5 feet.
Additional information regarding sight distance for intersections and cases other than the stop control
condition can be found in AASHTO's A Policy on Geometric Design of Highways and Streets.
Figure 8-2 Departure Sight Triangles at Access (Stop Control)
Clear Sight Triangle
Decision Point
fi
Departure Sight Triangle for Viewing Traffic
4
b
Weld County Rd
Clear Sight Triangle
Decision Point
Departure Sight Triangle for Viewing Traffic
Approaching the Access/Driveway from the Left Approaching the Access/Driveway from the Right
8.6.3 Subdivision Roads Sight Distance
Roads should not have visible impediments between 3 feet and 8 feet in height at subdivision
intersections within a triangular area, as shown in Figure 8-3.
Figure 8-3 Subdivision Road Sight Distance Triangle
r EDGE OF DRIVING
SURFACE (FLOWLINE)
40'
PROHIBITED
AREA
40'
POINT OF
INTERSECTION
EDGE OF DRIVING
SURFACE (FLOWLINE)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 112
8.7 AUXILIARY TURN LANES
Auxiliary lanes are useful in maintaining the safety, traffic flow, and operation of a roadway or access.
When auxiliary lanes are required by the County or warranted by information obtained curing the
development review process, the applicant is responsible for design, installation, and any purchase of
right-of-way to accommodate the required lane width. Auxiliary lanes are required wher unique
location factors (e.g., roadway speed and traffic density, access volume, the volume of commercial
trucks, the
influence of nearby accesses, existing auxiliary lanes close to the proposed access, nearby traffic control
devices, available stopping sight distance, and other topographic or roadway design factors) exist that
determine the need for auxiliary lanes.
Auxiliary lanes are required to mitigate specifically identified and documented locations with safety
and/or operational problems. These include:
• Any access where high traffic volume or lack of gaps in traffic make an auxiliary lane necessary
for vehicles to safely and efficiently enter/exit the roadway.
• Any locations where conditions such as horizontal or vertical curves and sight obstructions exist
that cannot be removed and may negatively affect public safety or traffic operations.
Auxiliary lanes typically consist of one or more of the following: transition taper, acceleration or
deceleration length, and storage length (see Figure 8-4). The use of these components varies based on
speed limit, through street classification, and site -specific conditions (grades).
Figure 8-4 Auxiliary Lanes Layout
REDIRECT TAPERS
REDIRECT TAPERS --\
ACCELERATION LANE DECELERATION LANE
DECELERATION LANE ACCELERATION LANE
TRANSITION TAPERS TRANSITION TAPERS
Auxiliary turn lanes shall be installed on local, collector, and arterial roadways according to the criteria in
Table 8-4, which is consistent with the requirements for Rural Highways in the CDOT State Highway
Access Code. Auxiliary lanes may be also required at the County's discretion if safety needs or unique
location factors discussed above warrant the addition of an auxiliary lane. Auxiliary lane thresholds
should incorporate a passenger car equivalent factor based on the existing and projected bus, truck, and
combination volumes.
WELD COUNTY ENGINEERING 8t CONSTRUCTION CRITERIA PAGE 0.13
Table 8-4 Auxiliary Lane Requirements
Classifications
Auxiliary
Lane Criteria to
be Checked
Left
Minimum
Deceleration
for
Turns
Ingress
Required
Turn
Lane
Right
Minimum
Deceleration
Turns
for
Right
Ingress
-Turn
Required
Lane
Require
Acceleration
Minimum
Right
Turns
Right-
Egress
to
Turn
Lane
Minimum
Acceleration
Turns
Egress
to
Left -Turn
Require
Lane
Left
Left-
Arterial
10 vph
25 vph
50 vph
May
safety
would
of
be
the
required
benefit
and
roadway
operation
the
if
it
Collector
10
vph
25 vph
50 vph
May
safety
would
of
be
the
and
required
benefit
roadway
operation
the
if
it
Local
10
vph
25 vph
Generally
applicable
not
Generally
applicable
not
Components
Deceleration
+
Storage
Taper
Length
Length
Length
+
Deceleration
+ Taper
Storage
Length
Length
Length
Acceleration
(Includes
Taper)
Length
Acceleration
(Includes
Taper)
Length
g
+
Geometric
The geometric components of a deceleration lane are shown in Figure 8-5 and of an acceleration lane in
Figure 8-6.
Figure 8-5 Geometric Components of A Deceleration Lane
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 114
Figure 8-6
Geometric Components of an Acceleration Lane
8.7.1 Auxiliary Lane Length
To determine the required acceleration and deceleration lane and transition taper length, see the design
criteria presented in Table 8-5 and Table 8-6. Table 8-5 is an excerpt taken from Table 4-5 of the State
Highway Access Code, August 31, 1998 for a Category R -B —Rural Highway. A rural highway is described
as, "highways that have the capacity for moderate to high travel speeds and low traffic volumes
providing for local rural needs. This category may be assigned to low volume minor arterials, secondary
collectors and local highway sections that do not normally provide for significant regional, state or
interstate travel demands. "The Category R -B meets the needs for most Weld County ma ntained
roadways. The designer should refer to the State Highway Access Code for roadways with characteristics
differing from the R -B description above.
The length of the required transition taper is determined by multiplying the distance offset (lateral shift)
by the transition taper ratio value associated with the posted speed in Table 8-6. The beginning and
ending point of all tapers shall be rounded.
• Acceleration Transition tapers: The purpose of an acceleration lane and transition taper is to
provide sufficient length for a vehicle to accelerate to the appropriate speed and merge into the
through traffic lanes without disrupting traffic flow. Table 8-6 provides the required acceleration
lane and transition taper lengths by design speed. Acceleration lane lengths in Table 8-6 will be
adjusted for a grade of 3 percent or more by the factors shown in Table 8-7. The total length of
the acceleration lane includes the values of both the lane and transition taper. The length of a
transition taper is calculated by multiplying the width of the lane by a standard ratio shown in
Table 8-6. The beginning and ending point of all tapers will be rounded.
• Deceleration Lane lengths: Deceleration lengths shown in Table 8-6 represent the estimated
distance to maneuver from the lane into an auxiliary lane and brake to stop. The transition taper
is calculated based on design speed and deceleration lane lengths in Table 8-6 will be adjusted
for a grade of 3 percent or more by the factors shown in Table 8-7. The storage lane lengths will
be included in the calculation, which are shown in Table 8-8 or based on the results of a Traffic
Study
• Redirect or straight tapers: Redirect tapers will be used where an exclusive turn lane, median, or
other redirection of vehicles is necessary and where redirection of the flow of traffic is necessary
to accommodate the exclusive turn lane or median. Redirect tapers required for redirecting
through travel lanes will be installed in conformance with Table 8-6. If the redirect taper would
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 0_15
result in a horizontal curve design deficiency for the through movement, the horizontal curve
will be corrected. Redirect tapers should be designed as straight tapers with the beginning and
ending points rounded.
• In cases where there is constrained right-of-way, restrictive topography, or limited distance
between intersections, a design waiver may be obtained to construct a shorter auxiliary lane.
Table 8-5 Components of Speed Change Lane Lengths for Rural Highways (R -B) from State
Highway Access Code
Access Category
Left -Turn
Deceleration
Lane
Right
-Turn
Lane
Deceleration
Acceleration
Lane
R -B
*decel.
Length
+ storage
*decel.
Length
*accel.
length
*Taper length is included within stated accel. Or decel. length
Table 8-6 Acceleration/Deceleration Lane and Taper Design Criteria and Redirect Taper for
Through Lanes
Acceleration/Deceleration
Lane
Design Criteria
Posted
speed
limit
(MPH)
25
30
35
40
45
50
55
60
65
Deceleration
length
(ft)
180
250
310
370
435
500
600
700
800
Acceleration
length
(ft)
N/A
190
270
380
550
760
960
1170
1380
Accel/Decel
Transition
taper
(ratio)
7.5:1
8:1
10:1
12:1
13.5:1
15:1
18.5:1
25:1
25:1
Redirect
(ratio)
(Straight)
taper
for
Through
Lanes
15:1
15:1
20:1
30:1
45:1
50:1
55:1
60:1
65:1
Table 8-7 Grade Adjustment Factors for Acceleration Lanes
Grade
Posted
Speed
Limit (mph)
25 to 45
50
55
60
65
3
to 4.9%
Up
Grade
1.3
1.4
1.5
1.5
1.7
5 to 7% Up Grade
1.5
1.8
2.0
2.3
2.5
3 to 4.9%
Down Grade
0.7
0.65
0.65
0.6
0.6
5 to 7%
Down Grade
0.6
0.55
0.55
0.5
0.5
8.7.2 Storage Lengths
The storage length for an auxiliary lane can be determined by the information summarized in Table 8-8.
These lengths are based on the average length of a passenger vehicle and the estimated turning vehicles
per hour. Estimated lengths for buses, larger trucks, and recreational vehicles must be determined and
submitted to the County for review, or a "passenger car equivalent" (PCE) should be incorporated into
the storage length calculation. Use a PCE of 3 for each bus and all trucks and combinations of 40 feet in
length or longer. Use a passenger car equivalent of 2 for each vehicle or combination at or over 20 feet
in length but less than 40 feet.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 116
Table 8-8 Auxiliary Lane Storage Lengths
Auxiliary
Lane Storage
Lengths
Turning
vehicles
per
hour
< 30
30-59
60-100
100
200
300
Minimum
required
storage length
(ft)
25
40
50
100
200
300
Truck
traffic
generators (ft)
100
100
200
200
200
300
The basis for designing the length of required storage is to provide sufficient length for vehicles to queue
within the lane without affecting other movements. Table 8-8 provides the required storage lengths for
stop -controlled intersections. Storage lengths for signal -controlled intersections may be determined
from highway capacity nomographs in the Highway Capacity Manual or may be based or the
recommendations of the submitted Traffic Impact Study for the development. If the Department of
Public Works determines that meeting the required storage length is impractical or will result in an
unsafe condition, the minimum storage length will be based on the mean arrival rate.
8.7.3 Auxiliary Lane Conflicts
The following standards also apply for auxiliary lane design.
1. No driveway will be permitted within the transition area of any auxiliary lane.
2. In the event that a portion of an auxiliary lane extends across one or more adjacent properties,
the County may require the applicant to obtain any necessary right-of-way.
3. In the event an auxiliary lane is constructed within 100 feet of an arterial -arterial intersection,
the applicant is responsible for design, acquisition of required right-of-way, relocation of
utilities, and construction of the lane to such intersection.
4. Where two intersections have exclusive turn lanes that overlap or the ending points of the
exclusive turn lanes have less than 300 feet or one-half their length of separation (whichever is
shorter), and a significant structure or topographical feature does not preclude widening, a
continuous exclusive turn lane will be constructed between the intersections to improve
roadway consistency and safety, and to maintain edge of pavement continuity.
5. If restrictive topography allows only one exclusive turn lane, normally a left -turn deceleration
lane is given first priority. Where a left -turn lane is installed and the travel lanes must be
redirected, an overlay of pavement is required.
8.8 ACCESS CONSTRUCTION
All roadway access construction that affects existing structures within the County right-of-way such as
pavement, curbs, gutters, sidewalks, drainage structures, ditches, and auxiliary lanes —is required to
incorporate modifications to existing structures as part of the final access design. An Access Permit is
required prior to any new access construction. The Access Permit allows construction of tie access
without the need for obtaining a separate Right -of -Way Use Permit unless the proposed access point is
located within section line County Right -of -Way or if the access is to be paved with asphalt or concrete.
8.8.1 Gravel Requirements
Gravel or recycled asphalt gravel base will be permitted for individual residential access or field access
adjacent to County roads with gravel surfacing. The gravel surface will include a minimum of 6 inches of
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A G f' I 117
compacted aggregate base course or equivalent material from the right-of-way line to the edge of the
traveled roadway. Specifications for this material can be found in Section 9.6.6.
8.8.2 Pavement Requirements
Access pavement thickness shall match roadway pavement thickness. If required by the weather, a delay
of one season in placement of hot bituminous pavement may be allowed, provided adequate gravel
surfacing is substituted and maintained until asphalt placement.
8.8.3 Access Drainage
Accesses shall be constructed in a manner that minimizes erosion and does not result in deposition of
silt and debris on the County roadway or in roadside ditches. Accesses that slope down toward the
public road will be constructed to assure that water does not run onto or across the traveled public way.
This may include designing the crown, borrow ditches, pans, or other elements so that they direct water
to the existing drainage facilities along the road. The owner of the property shall pay for materials and
the cost of installation for new access culverts whenever the installation of a culvert is made necessary
by the creation of a new access from private property to a County roadway. The applicant is responsible
for any alterations of the natural flow of water across private properties.
8.8.4 Structures
For efficiency and to avoid maintenance or public safety concerns, the County reserves the right to
maintain the full width of the road right-of-way without structures located thereon. Structures include,
but are not limited to, fences, trash cans, gates, mailboxes, and irrigation structures regardless of
whether they are physically located on the traveled portion or right-of-way will be removed from the
right of way upon written request by the Department of Public Works. Mailboxes may be located in the
public road right of way only where they do not create a roaddside hazard, obstruct or hinder vehicular
or pedestrian traffic, or interfere with road maintenance activities such as snowplowing and mowing.
Mailboxes will be located at least 8 feet away from the edge of the traveled way.
Wear, damage, or breakage to mailboxes, fencing, decorative items, signage, or any other
appurtenances throughout the property roadside frontage due to thrown snow and inclusions from
snow removal activities on a County -maintained road will not be the responsibility of the County.
8.9 AVERAGE DAILY TRAFFIC COUNT
Volume counts are expressed as average daily traffic (ADT) counts or annual average daily traffic (AADT)
counts. ADT is the unadjusted, average number of vehicles passing in both directions at a specified
location of a roadway. AADT is the term used to show the average traffic volume in both directions on a
section of road, adjusted for seasonal variation. Traffic count information for pavement designs must be
obtained from the Weld County Public Works Department. If the count information is not available for
the area needed, then a traffic count must be completed by the designer and approved by Weld County.
The count must be a 72 -hour continuous count and completed on Tuesday, Wednesday, and Thursday
of a normal week (no holidays or special events taking place). The traffic count cannot be a raw volume
count; it must include a Vehicle Classification. If known changes to the traffic volumes exist since the
latest count, such as new development or changes to existing development that could modify the
counts, then a new traffic count may be warranted.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1118
Table 8-9 Traffic Count Seasonal Adjustment Factors
SEASONAL
ADJUSTMENT
FACTORS
Timeframe
Adjustment
Factor
Jan. 1
—Feb.
28/29
1.08
Mar.
1 —Apr.
4
1.00
Apr.
5 —May
16
0.98
May
17 —Jun.
20
0.96
Jun.
21
—Aug. 22
0.94
Aug. 23 —Sep.
26
0.94
Sep.
27 —Nov.
1
0.97
Nov.
2 —Nov.
29
1.04
Nov.
30 —Dec.
31
1.08
8.9.1 Vehicle Classification
Vehicle classification categorizes vehicles into three types, as described below.
• Lightweight vehicles: All motorcycles, cars, pickups, vans, and single/dual wheels
o Class 1 through Class 3
• Single units: Buses and other units up to three axles
o Class 4 through Class 7
• Combo units: Vehicles of four axles and more
o Class 8 through Class 13
Error! Reference source not found.Figure 8 7 shows the most common types of vehicles round on the
nation's highways. Designers can use this information to determine which vehicle classification category
should be used for the vehicles identified in the traffic count.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 0.19
Figure 8-7 FHWA Vehicle Classification (CDOT M -E Pavement Design Manual, Figure 3.6)
Schema
Description
r
11ti
nom! re
i
a? notcrcyces ply_.
MO wheel ax1Es
3II cars plus
II
ts rs.
a _
311 pickups
dJ31
3^d '.ars
fineets
[;=1
stripe!
ptus
onertato
tree axle
La_
no.:-
I
'_
trans
1-1C
{
�.
eti.
••e
w
cbutsess
1
1
_
•
g
r*o
srig
sngie
axle.
le wilt
ot�, 'AreE 5
n
I.
three axle.
fligle unit
.11:4
LI
i
r
i
91
Oa
do Jr akle
s or IE i_^II
7
")
•
i I
f >
o
toisor'es s aj:4==,
single t -3l i e -s
8
cosi
$1,
�1
1
_
Y,
i ii"
-I*
rive 3res
6singI'a11Ft
_
six or more ak -Ei;
single trailers
10
••.
f!Pi. 1 �rleS5 axles
11
six axles,
::III - .
12
1__
•
i •
•
mail e7.
i ••
I
13
.W
ni• OL
I
.
/ / \4.
f1.-
-jai,
'Ili
111111r
it
-P1C J6E- Stile
.04.141c 4
1`�' _
14
e1
)
15
lit
used
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE X120
CHAPTER 9 SOIL INVESTIGATION AND PAVEMENT DESIGN
9.1 INTRODUCTION AND PURPOSE
The design of a pavement structure involves the consideration of many factors and conditions the
most important being traffic volumes, vehicle classifications, design materials, existing materials, local
climate, and drainage conditions. The purpose of this chapter is to give general guidance and to
supplement the existing design information contained within the latest editions of the 1993 AASHTO
Guide for Design of Pavement Structures and the CDOT M -E Pavement Design Manual, as well as
AASHTO or ASTM Material Manuals. AASHTO 1993 should be used only for onsite roadway pavement
designs and M -E should be used for any offsite pavement designs maintained by Weld County. These
criteria provide the basic design procedures and reporting guidelines for flexible and rigid pavements.
The final design should be based on a thorough investigation of specific project conditions, projected
traffic, life- cycle economics, and on the performance of comparable projects with similar structural
sections under similar conditions. An adequate pavement design will reduce long-term maintenance
costs and provide a long-lasting driving surface.
9.2 FIELD INVESTIGATION AND SOIL SAMPLES
Designers should visit each site to gather information that may help determine the appropriate design.
Whether this is a new design or rehabilitation of an existing pavement, information such as current
distress, drainage conditions, roughness, traffic control options, and surrounding land usage should be
collected and will be used later during the actual design.
9.2.1 Testing Frequency
Soil samples within the project limits will be obtained for each soil type as defined in the Soil Survey of
Weld County, Colorado(http://websoilsurvey.nres.usda.gov/app/) or at a spacing of not more than 500
linear feet. These boring locations will include, but not be limited to, travel lanes, shoulders, auxiliary
lanes, and roadside ditches.
9.2.2 Sampling Procedures
Borings can be performed by either an auger or core drill. The depth of each hole generally should be at
least 5 feet to 10 feet, depending on the anticipated depths of cuts or fills of a new roadway. Borings for
rehabilitation of existing surfaces generally can be on the lower side of the range unless major
reconstructions are necessary at certain locations. All borings will be field logged and visually classified.
9.3 SUBGRADE TESTING
9.3.1 Classification
Each boring location will be tested to determine liquid limit, plastic limit, plasticity index, and the
percentage passing the U.S. Standard No. 200 sieve. Test results will be used to calculate the AASHTO
Classification and Group Index using AASHTO M 145.
These data will be determined using the following methods:
• Liquid limit: AASHTO T 89 or ASTM D 4318
• Plastic limit: AASHTO T 90 or ASTM D 4318
• Percent passing No. 200 sieve: AASHTO T 11 or ASTM C 117
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 122
• Gradation: AASHTO T 27 or ASTM D 422
9.3.2 Swell Test
Swell potential evaluation will be required when a soil is classified as an A-6 to A-7 type.
• Swell test: AASHTO T 216 or ASTM D2435
9.3.3 pH and Sulfate
pH and Sulfate testing will be performed at each boring location. It is important not only to identify the
presence of sulfates but also the depth of occurrence. The designer or project manager should know
what depths are crucial to the success of the design.
• Sulfate ion content: CP-L2103
• pH of soils: AASHTO T 289
9.3.4 Moisture Density
Standard test methods for moisture density are described in AASHTO T 99 and AASHTO T 180.
9.3.5 Hveem Stabilometer
Representative samples will be tested to determine the subgrade support value using Hv-em
Stabilometer (R -value) testing. These values will be used in the design of the pavement section. R -value
will be performed on each soil group (AASHTO classification) but will never be less than a minimum of
two per soils report. These tests will be conducted in accordance with the following procedures. We
suggest performing the hydrometer testing for all applicable soil of interest since the percent silt and
clay content in soil are identified as important independent variables.
• R -Value: CP (Colorado Procedure) 3101 (AASHTO T190 & ASTM D 2844-07) where the reference
documents used to develop CP 3101
Table 9-1 Test Requirement and Frequency
Test
Testing
Frequency
Notes/Exception
Liquid
limit
Each
Boring
Location
Plastic
limit
Each
Boring
Location
Gradation
Each
Boring
Location
AASHTO
Classification
Each
Boring
Location
pH
Each
Boring
Location
Sulfate
Each
Boring
Location
Swell
Each
Clay
Soil
Type
A-6 through
A-7-6 soil
types
Moisture
Density
Per
Report
Bulk
sample
of
material
governing
pavement design
CBR
or
R -value
See Section 9.3.5
9.4 PAVEMENT DESIGN CRITERIA FOR ONSITE ROADWAYS
Weld County's pavement design method for onsite roadways is based on the 1993 AASHTO Guide for
Design of Pavement Structures equations and CDOT guidelines. This section provides the criteria used
for the design of these pavements. These criteria will ensure adequate strength and durability to carry
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 123
the predicted traffic loads for the design life of each project. Alternative designs will be considered as
advances are made in pavement design methods and paving materials. Any deviation from the criteria
presented in this document must be technically justified and approved by the Public Works Department.
Weld County does not allow the use of full -depth asphalt paving and does not accept maintenance of
any full -depth paved roads
9.4.1 Design Equivalent Single Axle Loads (ESAL)
There are certain input requirements needed to obtain an 18,000 -pound (18 KIPS) Equivalent Single Axle
Load calculation or design ESAL.
• Annual average daily traffic count (see chapter 8)
• Vehicle classification (see chapter 8)
• Traffic equivalence load factors
• Traffic growth rate
• Design period
• Lane factor
9.4.2 Traffic Equivalence Load Factors
The equivalence load factor is a numerical factor that expresses the relationship between axle loads of
the three types of vehicles. Table 9-2Table 9-3 presents equivalence loads factors from CDOT's M -E
Pavement Design Manual.
Table 9-23 Equivalence Load Factors (CDOT M -E Pavement Design Manual, Table H.2)
3 -Bin
Vehicle
Classification
Flexible
Pavement
Rigid Pavement
Lightweight
vehicles
0.003
0.003
Single
units
0.249
0.285
Combo
units
1.087
1.692
9.4.3 Traffic Growth Rate
The number of vehicles using a road tends to increase with time. Weld County uses a 20 -year growth
rate to estimate the future traffic on roadways. The growth rate is applied to all of the vehicle
classifications. A growth rate assumes that the AADT percent growth rate for any given year is applied to
the volume during the preceding year. Contact the Public Works Department for assistance in
determining an appropriate growth rate.
9.4.4 Lane Factor
The number of vehicles or ADT on the roadway will be split according to the number of lanes in the
proposed roadway. Table 9-3Table 9-4 lists the acceptable values.
Table 9-34 Lane Factors (Modified from CDOT M -E Pavement Design Manual, Table 3.3)
Lanes per
Direction
Design Lane
Factor
One lane
0.60
Two
lanes
0.45
Three
lanes
0.309
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 1124
Four lanes
0.25
9.5 FLEXIBLE PAVEMENT DESIGN
9.5.1 Serviceability and Reliability
The initial serviceability for asphalt at construction normally will fall in the range of 4.2 to 4.6 and
generally will be assumed to be 4.5. The terminal serviceability is based on the current ADT. These
factors can be found in Table 9-4Table 9 5.
Table 9-45 Serviceability
Serviceability
Loss
ADT
2.0
>750
2.5
<750
The reliability factor, shown in Table 9-5Table 9-6, is based on the functional classificatio i of the
roadway. Weld County's functional classification map can be found on the transportation planning
section of the Public Works Department web page.
Table 9-56 Reliability Factor
Functional
Classification
Urban/Rural
Arterial
90
Collector
85
Local
80
9.5.2 Standard Deviation
Weld County uses an overall standard deviation of 0.44 for all pavement designs.
9.5.3 Drainage Factor
The drainage factor shown in Table 9-6Table 9-7 may be incorporated into the pavement design to
account for the drainage characteristics of the site.
Table 9-67 Drainage Factor
Quality
Drainage
of
Water Removed
Within:
Percent of
Time
Pavement
Levels
Approaching
Structure
is
Saturation
Exposed
to Moisture
Less than
1%
1%
to 5%
5% to 25%
>25%
Excellent
2
hours
1.40-1.35
1.35-1.30
1.30-1.20
1.20
Good
1
day
1.35-1.25
1.25-1.15
1.15-1.00
1.00
Fair
1
week
1.25-1.15
1.15-1.05
1.00-0.80
0.80
Poor
1
month
1.15-1.05
1.00-0.80
0.80-0.60
0.60
Very
poor
Will
not drain
1.05-0.95
0.95-0.75
0.75-0.40
0.40
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 1125
9.5.4 Strength Coefficients
The strength coefficients are used in the structural number equation to determine the thickness of the
various layers of the pavement structure. Table 9-7Table 9-8 lists the strength coefficients for various
potential components of the pavement section.
Table 9-78 Strength Coefficient
Component
Strength
(per
inch
Coefficients
of material)
Test
Criteria
Conventional
Materials
HMA
0.44
See Section
9.6.3
*Existing
bituminous
pavement
0.20-0.40
N/A
Aggregate
base course
0.14
R -value
≥83
Aggregate
base course
0.12
77≤ R -value
<83
Aggregate
base course
0.11
69≤
R -value
<77
Existing aggregate
base course
0.09
N/A
Treated
Materials
Fly
ash
0.10
7 -day,
150
psi
Lime treated
subgrade
0.14
7 -day,
160
psi
Cement treated
base
0.22
7 -day,
100-200
psi
Cement
treated
base
0.23
7 -day,
200-300
psi
*Falling Weight Deflectometer or CDOT structural layer coefficients of existing pavements forms will be used to
determine the structural coefficient for existing bituminous pavements.
9.5.5 Pavement Thickness
Full -depth pavement sections will not be allowed within the County -maintained right-of-way. A
composite section of hot mix asphalt (HMA) and free draining sub -base material will be used. Total HMA
thickness will not be placed in lifts less than three times the nominal maximum aggregate size of the mix
being used.
9.5.6 Pavement Design
All pavement design will be prepared in accordance with AASHTO and CDOT pavement design
procedures. A computer -generated printout of the design and/or other design calculations must be
included with the design submittal.
In lieu of design, 12 inches of HMA over 12 inches of aggregate base course (ABC) will be the minimum.
9.6 MATERIAL SPECIFICATION
9.6.1 General
All sources of mined or manufactured materials used within the County -maintained right-of-way must
be approved annually by the Public Works Department.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 0.26
9.6.2 Procedure for Material Source Approval
On or before April 1 of each year, or a minimum of 14 calendar days before beginning construction,
materials suppliers will supply written documentation and material test results from a materials testing
laboratory. These will indicate the following:
• That the material(s) being tested meet(s) the minimum specifications
• The test procedure employed
• The material test results
A signed statement will be provided by the material suppler certifying that the materials tested are
representative of the materials to be provided during the coming 365 -day period.
9.6.3 Hot Mix Asphalt
HMA will meet the requirements of and be placed according to Table 9-8Table 9 9 below and the latest
edition of CDOT's Standard Specifications for Road and Bridge Construction. The 100 gyration mixes
should be used on arterial and collector roads. 75 gyration mixes to be used on minor and major
residentials roadways. HMA leveling courses, mid mats, and residential wear courses to k e 64-22 mixes
with a maximum of 20% RAP used in aggregate gradation. HMA topping or wear course should be an SX
64-28 mix with 100% virgin aggregatesa maximum of 20% RAP, on arterial and collector roads.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGF I 127
Table 9-89 Master Range Table for Hot Mix Asphalt from Table 703-4 in CDOT's Standard
Specifications for Road and Bridge Construction
Sieve Sir`
Percent
by Weight
Passing
Square
Mesh
Sieves
Grading
SF
Grading
ST
Grading
SX
Grading
S
Grading
SG
37.5 mm
(11A")
100
25.0
on)
mtn
in I 1
4)(
19.0mm
(3/4n
12.5 1Ill11
100
90 - 100
*
(,��n )
9.5 mm
( ,
100
90 I
Do
*
4
4.75 mm
('T4)
28 58
28 58
-"
H 45
2.36 mm
( $�
-
--
, _It;
1.18
1
mm
f,)
30 - -1
600
(#30)
gm
-
*
-
:*
300
(#50)
pm
150
(#100)
pm
75µm
(#200)
2- 12
2 lo
2 lu
2-8
1 -7
* These
using
additional
values
from
Form
the
43
As
Used
Specification
Gradation
Screens
shown
will
on the
initially
Design
be established
Mix.
9.6.4 Portland Cement Concrete Pavement
Portland Cement Concrete Pavement (PCCP) materials will meet the requirements of and be placed
according to Table 9-9Table 9 10 below and the latest editions of CDOT's Standard Specifications for
Road and Bridge Construction and CDOT's M&S Standard Plans.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE: 1128
Table 9-940 Concrete Aggregate Gradation Table from Table 703-1 in CDOT's Standard
Specifications for Road and Bridge Construction
Sieve Sine
Coarse Aggregates (from AASHTO
M43)
Fine
No. 3
No. 357
No. 4
No. 467
No. 57
No. 6
No. 67
No. 7
No. 8
Aggregate
50 nom
25 0
(2" to
50 nun
to
4.75 mm
(2'' to
No. 4)
c5 lion
c ►
1,,+ l I nui n,
I I ' + ,
37.5 mm
to
4.75 mm4
(11/4" to
#4)
25.0
( 1
t�5
„
mm
10
19.0 mm
to
9.5 mm
(%" to
3/8")
19.0
to
4.75
(14"
#4)
mm
mm
to
12.5
4.75
mm
to
mm
(1" to
#4)
9.5 mm
to
2.36 mm
(3/i " to
u 8)
4.75
150
(#4
#100)
mm
to
µn1
to
1.,
#4)
63 mm
(2W/2„)
U(!
j
ll(I
-
__
_
50mm(2")
1/4m -inn
9—iiiit
Hu
I{ifi
37.5
(1'/?)
rnm
35-70
90-100
95-100
100
()-15
35-7()
,mm f l -:
25.0
(10>
95-100
Hu
11)O
19.E
mm
eh")
I)
H
:5 70
tM l
Hu
90-100
10I'
12.5
mm
(, ,,
10-30
is ,
1
30
9.5 mm
( 7�")
0
10
30
0
H
20-55
40
-70
85-100
l
i
iI I
4.75
(#4)
mm
,, R
i1
((
H
i; --,
O
1(1
0-15
10
30
I)
Hui
2.36 mm
(#8)
0 ) ;
0-5
0-10
80 l
uu
0-5
I.I8
(#
16)
mm
U
50-85
600pm
(#30)
25-60
300µm
i Ho
10-30
150µm
(#100)
l
10
9.6.5 Aggregate Base Course
ABC used in the pavement sections wi44shall be crushed angular manufactured aggregate Class 6, unless
otherwise approved. Class 6 Aggregate Base Course will meet the requirements in Table 9-10Table 9 14,
which shows the gradation requirements, PI requirements, and LA Abrasion requirements. The
minimum R -value shall be 69. Angularity of aggregate shall have a minimum fractured faces of one or
more as per ASTM D 5821 of 45% or more. Recycled Concrete Product (RCP) aggregate base course shall
not be used as shouldering material or as an exposed layer. RCP will be covered by a subsequent layer.
The liquid limit shall be as shown in Table 9-10Table 9 11 and the plasticity index shall not exceed six
when the aggregate is tested in accordance with AASHTO T 89 and T 90 respectively.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA I 129
Table 9-1044 Aggregate Base Course Requirements
Sieve Designation
Mass
Percent Passing
Square
Mesh
Sieves
LL
not greater than
35
LL not greater than
30
Standard
Mesh
1
Class
2
Class
3
Class
4
Class
5
Class
6
Class
7
ABC
RAP
(mm)
(in)
Class
150
6"
100
100
4"
100
75
3"
95-100
63
2.5"
100
50
2"
95-100
100
100
37.5
1.5"
90-100
100
25.4
1"
95-100
100
85-100
19
3/4"
50-90
100
75-100
12.5
1/2"
55-90
9.5
3/8"
45-80
4.76
No.
4
30-65
30-50
30-70
30-65
25-55
2.38
No.
8
25-55
20-85
1.18
No. 16
5-55
0.42
No. 40
.
0.07
No.
200
3-15
3-15
20 max
3-12
3-15
3-12
5-15
0-5
Plasticity
index
0
0
0
<6
<6
<6
<6
<6
LA wear test (T96)
50 max
50 max
9.6.6 Aggregate Surface Course (Gravel)
Aggregate used as surface course will meet the following requirements, unless otherwise approved.
Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel
conforming to the following:
4-
1. Los Angeles abrasion, AASHTO T96
2. Mechanically Fractured faces, one or more, ASTM D 5821, crushed material,
40%
not screened , to attain fractured face 45% min.
2,3. Free from organic matter and lumps or balls of clay
3.4. Liquid Limit, AASHTO T89
4.5. Dust ratio: %passing #200
%passing #40
5.6. Gradation and plasticity index, AASHTO T90
3530 max.
2/3 max.
As shown in Table 9-11Table 9-12
Do not use material that breaks up when alternately frozen and thawed or wetted and dried.
Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine
aggregate, material passing the No 4 sieve, will consist of natural or crushed sand and fine mineral
particles.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 130
Do not furnish material that contains asbestos fibers. Recycled concrete cannot be used as surfacing
gravel.
Table 9-1142 Aggregate Surface Course Requirements
Sieve
Designation
Mass
Percent
Passing Square
Mesh
Sieves
Standard(mm)
Mesh
(in)
Aggregate Surfacing
150.00
6
100.00
4
75.00
3
63.00
2.5
50.00
2
37.50
1.5
100
25.40
1
90-100
19.00
3/4"
12.50
1/2"
55-80
4.76
No.
4
45-65
2.38
No.
8
33-53
0.42
No. 40
15-35
0.07
No.
200
4-15
Plasticity
index
4 126
16
LA wear test
(T96)
40
max
9.7 SOILS/PAVEMENT DESIGN REPORT
The soils/pavement design report will include the following information:
1. Vicinity map of investigated area
2. Transparent overlay of proposed project "plan view" on vicinity and boring location drawings.
3. Scaled drawing showing the location of borings
4. Scaled drawing showing the estimated extent of subgrade soil types, thickness of base material,
thickness of and HMA
5. A spreadsheet showing all the factors used to calculate the design ESALs
6. Summary sheet listing all sample designations, liquid limit, plasticity index, percent passing the
No. 200 sieve, AASHTO classifications, group index, soil description, R -value, moisture content,
percent soluble sulfate, and pH
7. A discussion regarding potential subgrade soil problems, including, but not limite I to, soils with
swelling potential, frost -susceptible soils, groundwater, drainage considerations (surface and
subsurface), cold weather construction (if appropriate), soluble sulfates and pH in the subgrade,
and other factors or properties that could affect the design or performance of the pavement
system
8. Recommendations to alleviate or mitigate the impact of potential subgrade soil problems
9. Pavement design alternatives for roadway
10. Pavement mix types to be used for the project
11. Any deviations from the County criteria and discussion/justification of the deviation, a formal
request will be submitted for approval of the design alternative
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 131
CHAPTER 10 CONSTRUCTION CRITERIA
10.1 GENERAL
For the public safety, health, and well-being, it is crucial to ensure that proper construction practices
and industry standards are followed. The construction criteria defined within this chapter will be used
for any work within the County right-of-way and any infrastructure proposed for County maintenance.
In this chapter, the "contractor" is the individual, company, landowner, developer, or other entity legally
responsible for the construction work. Unless otherwise indicated, the term "engineer" refers to the
current County Engineer or his/her authorized representative, the term "department" refers to the
Weld County Public Works Department, and the term "inspector" refers to the current yield County
lead construction inspector or his/her authorized representative.
10.1.1 Policy on the Use of Referenced Publications
The information provided herein summarizes and/or supplements minimum standards that have been
prepared in great detail by CDOT. The most recent publications of the Weld County Deportment of Public
Works Conformed Standard Special Revisions to CDOT Standard Specifications for Road and Bridge
Construction with the Weld County Special Pro-ect Revisions and M&S Standard Plans are recognized by
Weld County as being the primary documents used by transportation contractors and construction
crews. However, CDOT policies represent statewide standards, which do not always satisfy local
conditions. When standards differ, the most recent version of the Weld County Department of Public
Works Conformed Standard Special Revisions to CDOT Standard Specifications for Road aid Bridge
Construction will govern followed by the instructic ns and
guidance in this chapter will govern.
All construction traffic control devices and their use must be in accordance with the latest version of the
MUTCD.
10.1.2 Control of Work and Inspection
The Department is responsible for oversight and inspection of construction that takes place within the
County right-of-way and for infrastructure proposed for County maintenance. In addition to the primary
goal of promoting public safety, the goal of County oversight —which takes the form of establishing
standards and conducting inspections —is to help ensure quality construction and thereb'i minimize the
long-term maintenance costs associated with County -maintained infrastructure. The County has the
authority to impose standards on construction work and determine whether it has been constructed in
accordance with approved plans.
The contractor is responsible for staying informed about and complying with all federal, state, and local
laws, ordinances, and regulations that may affect the work or impact those employed to do the work.
The contractor will indemnify the County against any claim or liability arising from the Co inty's actions.
Failure to meet these conditions can result in suspension of the work by the Department.
The Department will have the authority to suspend work if the contractor has failed to maintain safe
conditions for the public. Such notification will be presented to the contractor in written form, at which
time work will cease immediately —except for any activities necessary to position traffic control devices
and put other safety measures in place to leave the project site in a safe condition during the shutdown,
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 133
as directed by the engineer. The engineer will be the final authority in matters related to the proper
interpretation of approved plans and will make final determinations when discrepancies in the plans or
disputes between the inspector and the contractor occur.
The inspector will have the authority to inspect all work and materials being used. The role of the
inspector is to use acceptable engineering techniques and professional judgment to determine if the
construction is being accomplished according to the methods described in the standards. The contractor
will cooperate fully with inspection efforts, allow access to all parts of the work, and furnish any
information required for complete and detailed inspections. Inspection by the department will not
relieve the contractor or its designated representatives of the responsibility to control the work and
ensure compliance with the approved plans and specifications for the project.
10.1.3 Project Acceptance and Warranty
All work that does not conform to the standards Grand the approved plans whether resulting from
poor workmanship, use of defective materials, or lack of care will be considered unacceptable work.
Unacceptable work will be subject to removal and restoration prior to final acceptance of the project by
the County. Disputes related to the acceptability of work will be subject to a final determination by the
engineer.
Upon written notice from the contractor of the completion of all work, the inspector will make a final
inspection. If all project work is determined to be in compliance with the standards, the approved plans,
the performance guarantee, the subdivision improvement agreement, and the contract agreement or
other applicable agreements, the County will initiate the procedure for final acceptance and perform an
inspection for final acceptance. If the inspection discloses any work as being unacceptable, the Public
Works Department will notify the contractor in writing. After corrections have been made, another final
inspection will be scheduled.
The contractor will be responsible for maintenance and traffic control until final acceptance of the
project has been granted by the Public Works Department. Final acceptance does not relieve the
developer and/or contractor of a minimum two-year warranty on all workmanship and materials
incorporated into the project, unless specified otherwise by the County. The warranty period will
commence on the same date that written final acceptance is granted. Prior to the end of the warranty
period, the inspector will arrange for the project to be inspected and will notify the contractor of any
work items to be completed.
10.2 CONTRACTOR RESPONSIBILITIES
10.2.1 Qualifications, Insurance Requirements, and Licensing
Any contractor performing work within the right-of-way will have the qualifications to complete the
work in an acceptable and timely manner and will receive the necessary permit(s) from the Public Works
Department before beginning work. Contractors will be fully licensed, insured, and possess a valid IRS
Taxpayer Identification Number. The:Department reserves the right to suspend or deny work being
performed by any contractor or business that has been determined by the engineer to be unqualified to
perform construction within the right of wayright-of-way.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 134
The contractor will indemnify the County from lawsuits and claims of any type that may occur as a result
of its actions while performing work within the right-of-way. Until final acceptance of the project, the
contractor will procure and maintain insurance coverage in the minimum amounts specified in the most
recent version of the Weld County Department of Public Works Conformed Standard Special Revisions to
CDOT Standard Specifications for Road and Bridge Construction
the CDOT Specifications from an insurance company authorized to do business in the State of Colorado.
,ants specified in COOT
Specifications.
10.2.2 Pre -Construction Meetings
Contractors m-ayshall be required to schedule and attend a pre -construction meeting prior to starting
work on complicated projects. The engineer can waive this requirement if the project is small or
straightforward and it is determined that a meeting is not necessary. Attendees at the meeting typically
are the contractor's key personnel, subcontractors, material suppliers, utility companies, material
testing firms, the County inspector, and the County engineer. The meeting typically is he d at least one
week prior to start of construction.
The pre -construction meeting agenda likely will include the following:
• Exchange of contact information (phone numbers, fax numbers, etc.)
• Applicable safety requirements, contact information, and emergency procedures
• Construction traffic control requirements and methods
• Construction schedule with key dates and benchmarks
• Required contract paperwork (insurance, bonds, escrow, permits, etc.)
• Material submittals and testing requirements
• Special conditions and access requirements
10.2.3 Permits
Permitting requirements are discussed in Chapter 11 of this document. In addition to approved
construction plans, Weld County often will require obtaining and adhering to all requirements of a
Transport Permit, Right -of -Way Use Permit, Access Permit, Grading Permit, and Floodplain Development
Permit.
The contractor will be fully informed and knowledgeable of all required state and federal permits. Weld
County is not responsible for ensuring the contractor has satisfied permit requirements from other
agencies. However, copies of fully executed permits will be furnished to the engineer or inspector upon
request.
10.2.4 Public and Worker Safety
All work will be conducted in a manner that minimizes obstructions to traffic and pedestr ans. The safety
of the traveling public and adjacent landowners is the most important issue on every construction
project. Contractors must inspect and maintain the project to ensure safety, as they bear the sole
responsibility for any accidents or injuries related to the construction. The dDepartment has the
authority to suspend work if the contractor has failed to maintain safe conditions.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 135
The contractor will observe all rules and regulations of federal, state, and local health officials and
departments. No workers are allowed to be required to work in unsafe surroundings or under conditions
that are unsanitary, hazardous, or dangerous. Contractors will be fully informed and knowledgeable of
all current construction safety practices and protective equipment to be used for specific work
conditions.
The contractor is responsible for complying with all safety regulations governed by the Occupational
Safety and Health Administration (OSHA). The inspector is not responsible for enforcing these
regulations, but will monitor construction activities for obvious or suspected noncompliance with OSHA
regulations and will report any such issues to the contractor and the engineer. If imminent danger
potentially resulting in serious injury or death is identified in the construction area, and the contractor
has failed to act immediately to correct the dangerous condition, the engineer can issue a written work
suspension order.
10.23 Utility Coordination
When excavating or grading in the area of underground utilities, the contractor will comply with Article
1.5 of Title 9, Colorado Revised Statutes, "Excavation Requirements." as modified by SB-18-167. The
contractor will notify all affected utilities at least two business days prior to commencing work and will
contact the Utility Notification Center of Colorado (UNCC) at 8-1-1 to have locations of UNCC-registered
utilities marked onsite. All other underground facilities will be located by contacting the respective
utility owner. Affected utility company representatives should be invited to the pre -construction
meeting. Where the contractor's operations are adjacent to a utility owner's facilities, work will not
commence until arrangements (acceptable to both parties) for the protection of the utilities have been
made.
The approved plans will indicate clearlyclearly indicate those utility items that are to be relocated or
adjusted by the utility owner and those utility items that are to be constructed by the contractor. The
contractor will meet with the utility owners as often as necessary to coordinate and schedule
relocations or adjustments. Weld County is not responsible for the actions of utility owners, and the
contractor will not seek damages or claims against the County for coordination, inconvenience, delay, or
damages sustained due to interference from the utility owners.
10.2.6 Dust Control
The contractor is responsible for dust control related to its construction project. The contractor also is
responsible for compliance with the Colorado Air Quality Control Act. The majority of construction sites
can achieve adequate dust control by providing a water -spray truck to keep moisture in the exposed
soil. Water trucks may be required on any construction sites that disturb an area of land greater than 1
acre, or for projects that are using gravel roads as the main access to the construction site. The goal of
dust control is to prevent airborne particulates (dust) from leaving the construction site or access roads.
Damages or health issues caused by dust leaving the construction site are the sole responsibility of the
contractor. The contractor will be responsible for cleaning up and removing any dirt or dust that has left
the construction site.
Closure of a roadway often requires the contractor to set up a designated detour route for traffic. If the
detour route uses an existing gravel road, dust mitigation and road deterioration can quickly become a
problem. Such detours often will require the contractor to apply a durable dust treatment, such as
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 136
magnesium chloride. The department will determine the quantity, frequency, and locations of such dust
treatments. The contractor will need to use a county approved vendor which has a Right-of-way Use
permit with the county for the application.
The inspector will monitor the construction site and let the contractor know if dust control measures are
inadequate. Reasonable complaints received by the County or contractor from adjacent landowners, or
the traveling public will be addressed by the contractor in 24 hours or less. Failure to respond to
reasonable requests (as determined by the County) to provide dust control or failure to provide a water
truck on the construction site can result in a written suspension of work order from the engineer.
10.2.7 Traffic Control
During construction, the contractor will be responsible for supplying and maintaining traffic control
devices according to the requirements of the MUTCD. Any work within the right of way requires
approval of the Method of Handling Traffic (MHT) by the department prior to work commencing. In
addition, any road closure within the right= -of: way that will last for three days or more requires
approval by the BOCC prior to work commencing. The contractor should allow at least two weeks prior
to the planned road closure to obtain required approvals from the County.
The contractor's MHT will be prepared by a person knowledgeable and qualified in the area of traffic
control, who is a certified Traffic Control Supervisor (TCS). The MHT will be easily readable, prepared in a
professional manner, and include the following elements:
• A project site location map
• A diagram showing the location of all traffic control devices
• A tabulation of the sizes, types, and quantities of all traffic control devices
• Location of all existing roads and accesses within the traffic control zone
• Certifications of all TCSs and flaggers working on the jobsite
Traffic control devices will be inspected by the contractor's TCS for proper placement on at least a daily
basis and will be inspected during the nighttime at least once per week. The reflective surfaces of all
signs will be checked and cleaned on a regular basis, no less frequently than every two weeks. For safety
reasons, the contractor will not store materials or equipment near open travel lanes. Portions of the
roadway that are open to traffic will be maintained, kept clean, and kept free of snow and ice by the
contractor.
The inspector will monitor the traffic control set-up to ensure the MHT is being followed and to look for
any problems that need to be corrected. If the inspector deems that changes to the traffic control are
necessary, this will be communicated to the contractor and/or TCS.
10.2.8 Removal of Unacceptable or Unauthorized Work
Unacceptable work resulting from any cause found to exist prior to final acceptance of the project will
be removed and replaced in an acceptable manner at the contractor's expense. The construction of
transportation facilities requires a high degree of precision and quality from the contractcr. These
facilities will eventually be used by the traveling public, who assume that safe and predictable driving
and drainage conditions exist. Failure to remove and/or replace unacceptable or unauthorized work
within the right of way can expose the contractor to liability.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 137
The inspector is authorized to ensure the contractor is following approved plans and specifications, to
identify work that is unacceptable or unauthorized, and to communicate such findings to the contractor.
The contractor will correct the identified work in a timely manner. If the contractor and the inspector
disagree about whether work is unacceptable or unauthorized, the final determination will be made by
the engineer.
10.2.9 Record Drawings and Record Keeping
Preparation and organization of project records and record (as -built) drawings is an important step for
ensuring proper future maintenance of transportation facilities. This is especially true when the project
includes construction of underground facilities.
Changes in the scope of work, geometric design, structural plans, typical sections, standard plans,
specifications, and corrections of design errors must be incorporated into the as -built plans. These as -
built plans shall be sealed by the engineer responsible for changes.
Information shown on the as -constructed plans should include, but is not limited to the following:
Structures:
• Show tip elevation of piling for each pier, wall, or abutment.
• Show structure changes for both minor and major structures.
• Show type, manufacturer, manufacturer's project number, and shop drawing number of bridge
expansion and bearing devices installed.
• Show elevation and placement of brass cap benchmarks, when used. The elevation should be
project specific and marked on the plans. All temporary benchmarks on the plans will be lined
out.
• Vertical and lateral clearances should be indicated
Plan and Profile:
• Show the final location of new utility placements, unknown utility discoveries, relocations, and
changes. Abandoned utilities should be shown and noted.
• Show all geometric revisions to alignment, super elevation, and grade.
• Show significant changes in revised slope catches specifically ordered in the field
• Show final locations of minor structures.
• Show locations of discovered underground features, such as foundations or pipes, which are left
in place
• Show detailed information on the location of all buried material within the County right of
way or project limits.
• Detail any new or deleted accesses.
Drainage Plans:
• Meet the requirements of the As -Built Drawing Checklist provided in Appendix D of this
document
Prior to final acceptance of construction work, the contractor will turn in all requested as -constructed
information, materials testing information, electronic files, and submittals to the inspector for review.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1138
The As -Built drawings shall follow the requirements for As -Constructed drawings that are set for in the
Weld County Department of Public Works Conformed Standard Special Revisions to CDOT Standard
Specifications for Road and Bridge Construction
10.3 MATERIALS QUALITY CONTROL AND TESTING
10.3.1 Qualifications of Testing Personnel and Laboratories
Materials Process Control testing is an important and necessary part of any successful transportation
project. Testing of construction materials (soil, concrete, asphalt, etc.) ensures the owne - and contractor
that suppliers are providing the materials specified and adequate construction methods are being used.
CDOT qualifications related to materials are covered extensively in CDOT's Colorado Procedure 10
(CP10). It should be noted that Weld County does require the contractor to meet the qualifications for
testing personnel described in CP10. All process control testing by consultant or material testing firms
should be done in accordance to AASHTO and (CP) Colorado Procedures as directed in the CDOT Field
Materials Manual - OA Frequency Guide Schedule for Minimum Materials Sampling, Testing and
Inspection.
The AASHTO and CDOT Field Materials Manuals have developed and published detailed and specific
standard procedures to be used for materials testing. The contractor will be responsible for providing
material testing that meets the requirements of the applicable testing standard. The inspector will
provide oversight to ensure material testing is being performed properly and that testing laboratories
being used are adequate.
10.3.2 Minimum Testing Types and Frequencies
The contractor will make arrangements to provide material testing of the types and frequencies
described in the latest version of the Weld County Department of Public Works Conformed Standard
Special Revisions to CDOT Standard Specifications for Road and Bridge ConstructionCDOT Field Materials
Manual . OA. The inspector may accept some reduction in inspection and testing procedures under
certain conditions. If the contractor does not intend to meet the minimum testing frequencies listed in
the frequency guide schedule in the CDOT Field Materials Manuallatest version of the Weld County
Department of Public Works Conformed Standard Special Revisions to CDOT Standard Specifications for
Road and Bridge Construction, it must provide a written explanation to the inspector at least 48 hours
prior to start of the related construction.
Examples of conditions under which the minimum testing frequencies may be reduced by the inspector
could include:
• Very small quantities of materials are being used.
• The construction work is taking place outside of the roadway structural prism.
• The construction work is temporary in nature.
• The inspector has determined that construction methods being used easily exceed minimum
requirements, thereby resulting in predictable passing test results.
10.3.3 Material Sources and Sampling
All material sources used will meet the requirements of the approved plans and specifications. If the
contractor intends to use any materials that do not meet the requirements as described in the County
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE (139
criteria, it must provide a written description and request prior to or at the pre -construction meeting.
The engineer then may choose to review the information and grant a variance prior to construction
starting.
The inspector will be granted access by the contractor to sample and test all material to be incorporated
into the work. Failure to allow such access will result in a suspension of work order being issued by the
engineer. The inspector reserves the right to request proof from the contractor that materials being
delivered to the jobsite are coming directly from approved sources.
All materials will be handled and delivered in a manner such that their quality and acceptability are not
adversely affected during the process. Aggregates and pavement mixes will be delivered to the jobsite in
trucks designed to prevent loss or segregation of materials. The contractor will be aware that if
materials delivered to the jobsite show excessive segregation, disturbance, or contamination, they may
be rejected by the inspector. HMA that has cooled excessively also may be rejected by the inspector.
10.3.4 Required Submittals
Contractor submittals given to the County for review and approval will vary for each project, depending
on the scope and complexity of the work to be performed. A simple Access Permit or utility crossing may
not justify multiple submittals, while a large-scale bridge or roadway construction project may require
many submittals. The contractor will consult with the engineer prior to the pre -construction meeting for
a specific list of required submittals. A typical large-scale project could include submission, review, and
approval of the following documents:
• MHTs
• Construction schedule
• Shop drawings or fabrication details
• Concrete and asphalt mix designs
• Soils laboratory test information
• Manufacturer's product data and installation instructions
• Copies of required worker's certifications and qualifications
• Certificates of compliance and material samples
• Documents required by County Codes or by the Planning Department
10.3.5 Soils Reports and Pavement Designs
To ensure proper design of roads and bridges, the department will require the contractor to provide a
soils report and associated pavement design. In certain cases, the engineer may waive these
requirements. Specific requirements are described in Chapter 9 of this document.
10.3.6 Materials Rejection
Materials that do not meet the requirements of the approved construction plans and specifications will
be rejected by the inspector. Rejected materials will be removed from the right of way in a timely
manner at the contractor's sole expense. The contractor may choose to perform additional third -party
materials testing in an effort to reverse the inspectors' decision. However, in no case will rejected
materials be covered up or incorporated into the work without approval. In cases where the contractor
and the inspector disagree on a materials rejection issue, the engineer will make the final decision.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE: 1 140
10.4 EXCAVATION AND EMBANKMENT
10.4.1 Utility Trenching and Backfill Requirements
All utility trenches underneath or within 5 feet of a public roadway will be backfilled with suitable
materials and mechanically compacted to not less than 95 percent of maximum density, as determined
by AASHTO T99. This work will require the contractor to arrange and pay for the applicable materials
quality control testing. The exception to this requirement is underground utilities that are bored into
place or installed by similar methods which do not disturb the surrounding soils. Alternative backfill
u sing an approved flowable cement fill (flow -fill) mix design can be used instead of soil materials,
e liminating the need for onsite compaction testing.
Weld County Standard Flow -Fill Mix:
• Slump of 7 to 10 inches - ASTM C143
• Compressive Strength F'C-1,000 PSI @ 28 days
• ASTM 150 Type I -II, minimum 329 pounds
• Course Aggregate ASTM-33—Minimum 1,000 pounds
• Fine Grain Aggregate ASTM-33—Minimum 2,000 pounds
• Air Entraining Agent (SIKA Air) ASTM-C260 Minimum 1.0 oz./cubic yard
• Water Minimum 150 pounds
All utility trenches located more than 5 feet away from a public roadway will be backfilled with suitable
materials and mechanically compacted to not less than 90 percent of maximum density, as determined
by AASHTO T99. The inspector may choose to waive the requirement for materials testing in these cases
if s/he believes that proper construction methods are being used to ensure good compaction, or if flow -
fill is being used.
The department reserves the right to perform material testing on any utility trench being constructed
within the right_ of way. If the material testing performed by the department shows that the contractor
has failed to meet or exceed the compaction requirements described above, the contractor will be
directed to remove and recompact the backfill and/or pavement materials at its own expense.
See Section 10.7.5 for Pavement Cuts and Patching Requirements.
10.4.2 Unsuitable Materials
Soil materials used in embankment construction will be as recommended in the approvec soils report
for the project. Soil materials that do not meet the requirements of the soils report are identified as
being "unsuitable materials" and will be removed from the jobsite.
Projects that do not have an approved soils report will follow more general requirements for the
materials to be used. Embankment and fill material will be free of ice, organics, trash, glass, chemicals,
and other deleterious materials. When tested by a Hveem Stabilometer, the soils will have a minimum
R -value of at least 10R-20 and a maximum dry density of not less than 90120 pounds per cubic foot.
10.4.3 Moisture and Density Control
Moisture and density control will follow CDOT's Standard Specifications for Road and Bridge
Construction.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 141
The contractor will be responsible for material testing to confirm that proper construction methods are
being used and that the moisture and density requirements are being met. Moisture and density testing
requirements may be waived by the inspector in cases where the amount of embankment being
constructed is small or the embankment being constructed is not intended to be used for a public
roadway. However, the inspector is not authorized to waive or relax the testing requirements described
in an approved soils report.
10.5 SUBGRADE CONSTRUCTION METHODS
10.5.1 Unsuitable Materials
Suitability of subgrade materials is equal to that described for embankment materials in Section 10.4.2.
Subgrade materials that are deemed unsuitable for construction will be removed from the jobsite.
10.5.2 Soft Spots
Subgrade areas that cannot be constructed initially to meet compaction requirements or support traffic
loads using standard, acceptable construction methods are commonly referred to as "soft spots." Repair
of soft spots typically is addressed by first trying methods that require little time and expense, then
progressing to more costly methods if necessary. In cases where soft spots are numerous and extensive,
where the soft spots are so bad that standard construction equipment cannot access the area, or where
soft spots present a dangerous work condition, the contractor will consult a Professional Engineer or
Professional Geologist for recommendations for proper construction methods. The following are some
of the methods used to repair soft spots:
• Scarifying/drying/blending the onsite soils and then recompacting
• Over -excavating and backfilling with suitable onsite soils
• Over -excavating and backfilling with imported granular fill
• Over -excavating and placing geogrid or geotextiles, then backfilling with imported granular fill
• Subgrade treatment of onsite soils with cement, fly ash, or other approved materials
The success or failure of any of these methods will be determined by extensive proof rolling and
inspection.
10.5.3 Moisture and Density Control
Subgrade moisture and compaction requirements are similar to the requirements for embankments but
are a little more stringent since subgrade materials are a component of the overall roadway structural
section. If the subgrade materials fail to meet the conditions required in the overall pavement design,
the aggregate base and pavement sections are likely to fail prematurely. Moisture and density control
for subgrade will follow CDOT's Standard Specifications for Road and Bridge Construction.
The contractor will be responsible for material testing to confirm that proper construction methods are
being used and that the moisture and density requirements are being met. When the final subgrade
surface elevations have been established, proof rolling and inspection will be performed before any
aggregate base is placed on top of the subgrade.
10.5.4 Subgrade Proof Rolling
The department requires proof rolling of subgrade materials, observed by the inspector, to determine
their adequacy to support heavy loads. This work typically is accomplished with a heavy rubber -tire
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 142
truck, such as a water truck, that can generate a minimum axle load of 18,000 pounds per axle. The
inspector may require the contractor to provide a certified weight ticket as proof that adequate proof
rolling equipment is being used. The subgrade will be proof rolled after the required compaction has
been verified with materials testing equipment and the subgrade has been graded to the required
elevations called for in the plans.
The inspector will be notified at least 48 hours prior to any subgrade proof rolling. No proof rolling will
be accepted without the inspector or designee present.
Upon approval of the proof rolling, the contractor will place the aggregate base course on top of the
approved subgrade materials within 48 hours. If the contractor fails to place the aggregate base course
within 48 hours or the moisture conditions of the subgrade change due to inclement weather or other
conditions, proof rolling will need to be repeated.
10.5.5 Treated Subgrades
Subgrade soils can be treated with cement, fly ash, lime, or other approved stabilizing agents. This
approach is a cost-effective way to avoid over -excavation of unsuitable soils over large areas. Subgrade
treatment also is used to raise the structural value of the soils, thereby allowing the designer to require
less thickness of aggregate base course and pavement. Another reason for the use of stabilizing agents is
to reduce the swell potential of certain clay soils.
Specific moisture and density control requirements vary, depending on the type of stabilizing agent
used. Prior to placement of any subgrade treatment, the contractor will submit a mix design to the
inspector for approval. The contractor also will supply the inspector with information regarding the type
of delivery, mixing, watering, grading, and compaction equipment to be used during construction.
10.6 BASE COURSE CONSTRUCTION METHODS
10.6.1 Gradation and Moisture and Density Control
Overall pavement quality, including structural longevity and riding smoothness, is greatly affected by the
quality of the underlying subgrade and base course materials. Base course materials mus: meet
specified gradation and moisture and density control requirements to adequately support the traffic
loads. The department requires a minimum of 4 inches of compacted aggregate base course underneath
any permanent paved road surface. Depending on the pavement design, subgrade R -value, predicted
traffic loading, and other applicable factors, greater thicknesses of aggregate base course often are
required. The base course provides the pavement structure with a free -draining, non -frost -susceptible
material layer that distributes the traffic loads from the pavement surface to the underlying subgrade.
Aggregates for bases will be crushed rock, native or crushed gravels, crushed recycled cor crete, or
crushed recycled asphalt materials. Base course gradation will be as specified in CDOT Specifications:
Class 5 or Class 6 materials. Class 6 Aggregate Base Course typically is used for areas directly underneath
the permanent paved surface. Class 5 Aggregate Base Course typically is used for "shouldering" the
areas adjacent to the edges of the permanent paved surface. Shouldering materials shall not contain
crushed or recycled concrete materials. Prior to any placement of materials, the contractor will submit a
laboratory gradation test to the inspector verifying specifications are being met. The cont-actor also will
grant the inspector access to any stockpiles or sources of base course to be used on the project.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 143
The maximum compacted thickness of any individual lift of base course will not exceed 6 inches.
Multiple lifts will be required when the thickness is greater than 6 inches. Compaction of each layer will
meet a density of at least 95 percent of the maximum density determined in accordance with AASHTO T-
180. Water should be uniformly applied to ensure this compaction requirement has been met. The final
surface elevations of the base course will be graded to within .04' of the elevations specified on the
plans. Placement shall be performed utilizing side -dump or belly dump haul equipment. With the
exception of smaller area placement where material can be placed with little segregation using loader or
skid steer equipment. Mixing, moisture ccnditioning and grading shall be done with rubber -tired
equipment to prevent breakdown of aggregate and gradation. End dumping and Dozer grading is not
allowed unless authorized by a Weld County Engineer. If material is stockpiled for any length of time,
care should be taken in the maintenance cf the pile to prevent segregation of the material.
10.6.2 Base Course Proof Rolling
The department requires proof rolling of base course materials under observation of the inspector to
determine the adequacy to support heavy loads. This work typically is accomplished with a heavy
rubber -tire truck, such as a water truck, that can generate a minimum axle load of 18,000 pounds per
axle. The inspector may require the contractor to provide a certified weight ticket as proof that
adequate proof rolling equipment is being used. The base course will be proof rolled after the required
compaction has been verified with materials testing equipment and the base course has been graded to
the required elevations called for on the approved construction plans.
The inspector will be notified at least 48 hours prior to any base course proof rolling. No proof rolling
will be accepted without the inspector or designee present.
10.6.3 Treated Base Courses
Base courses can be treated with cement to obtain a stiffer and stronger material than an unbound
base. A stiffer base reduces deflections due to traffic loads, which results in lower strains on the
pavement surface. This approach can be a cost -saving measure that allows the designer to require less
thickness of pavement. Cement -treated bases need to be designed for each specific project. The
structural properties of cement -treated base depend on the soil/aggregate material, quantity of cement,
curing conditions, and age. The contractor will be responsible for submitting a mix design to the
inspector for review and approval prior to construction.
Specific moisture and density control requirements vary, depending on the cement -treated base mix
design. In addition to having an approved mix design, samples of the cement -treated base will be taken
during construction, and laboratory tests will be conducted to verify that the minimum strength
properties specified have been achieved. The contractor also will supply the inspector with information
regarding the types of delivery, mixing, watering, grading, and compaction equipment to be used during
construction. In addition, the inspector may require copies of certified weight tickets for the cement to
verify proper quantities have been incorporated into the base course. All testing of processed cement -
treated base material or its individual components, unless otherwise provided specifically in the
approved construction plans and specifications, will be in accordance with the latest applicable AASHTO
or ASTM material specifications. The final surface elevations of the cement -treated base course will be
graded to within one -quarter inch of the elevations specified on the plans.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 144
10.6.4 Acceptance Prior to Paving
Upon approval of the proof rolling, the contractor will place the pavement surface (if applicable) on top
of the approved base course materials within 48 hours. If the contractor fails to place the pavement
surface within 48 hours or the moisture conditions of the base course change due to inclement weather,
excessive drying, or other conditions, proof rolling will need to be repeated.
The inspector is responsible for giving the contractor final approval to proceed with placement of the
pavement surface on roads and bridges within the right of way. The contractor will furnish copies of
certified load tickets for the base course materials as proof that the correct type and quantity of base
course was delivered to the jobsite. When the inspector determines that base course placement is
acceptable, a pre -paving meeting can be held.
10.7 PAVEMENT CONSTRUCTION METHODS
10.7.1 Pre -Paving Meetings
Pre -paving meetings are mandatory on any road or bridge project that requires placement of asphalt or
concrete permanent pavement more than 50500 tons of HMA pavementHMA Pavement or 2,000 CYSY
of Concrete PavementConcrete Pavement. The meetings will be scheduled and arranged with the
inspector. Attendees at the pre -paving meeting generally include the contractor superintendent, paving
foreman, materials quality control tester, TCS, material supplier representative, engineer, and inspector.
The asphalt or concrete mix design will be submitted, reviewed, and approved by the inspector prior to
the pre -paving meeting.
Pre -paving meetings typically are held on the jobsite. Following is a partial list of the general items for
discussion:
• Introductions and attendance roster with contact information
• Assignment of specific duties
• Scheduling, construction sequencing, and traffic control requirements
• Materials quality control methods and requirements
• Types of hauling equipment and paving equipment to be used
• Construction details, such as lift thicknesses, joint construction, and pavement striping
• Conditions under which paving will cease (bad weather, darkness, holidays, etc.)
10.7.2 Recycled Asphalt Pavement Surfaces
Weld County has constructed roads using recycled asphalt pavement (RAP) as the pavement surface for
interim cross sections instead of gravel. This typically is accomplished as a permanent means of dust
control and is less costly than HMA. Candidate roads for RAP pavement are gravel roads tiat have a high
e nough ADT to make grading and dust control maintenance a significant effort, but low enough ADT to
n ot warrant permanent HMA pavement placement.
10.7.3 Hot Mix Asphalt Surfaces
Most County roads with permanent paved surfaces are constructed with HMA. This type of surfacing
suits the County needs well since our road crews are knowledgeable and well equipped tc properly
maintain asphalt roads.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1 145
The current edition of the CDOT Standard Specifications for Road and Bridge Construction, Sections 400,
403, 702 and 703 provide material specifications and construction methods generally acceptable to
Weld County. Table 9-8Table 9 9 has the Master Range gradation requirements for Grading S (%") on
bottom, intermediate lifts and SX (%") for top lift placement are acceptable. Designs will require
Performance Graded Binder of 64-22 on bottom and intermediate lifts, while top lifts will have 64-28
(Table 702-1 in CDOT's Standard Specifications for Road and Bridge Construction), other binder grades
must be approved in writing by Weld County Engineer. Design air voids will be targeted at 3.5-4.5%
under 100 gyrations. No more than 20% Recycled Asphalt may be used in the bottom and intermediate
lifts. Top lift will utilize virgin aggregate in the mix design. No asphalt shingles can be used in the
recycled asphalt products.
Prior to any asphalt placement, the contactor will submit an asphalt mix design to the inspector for
approval, as described in Section 401.02(a) (1) and (2) of the CDOT Standard Specifications.
The inspector reserves the right to perform a site visit and inspect the facilities of any asphalt supplier
used. During construction, the contractor will furnish copies of certified load tickets for the pavement
materials as proof that the correct type and quantity of pavement materials were delivered to the
jobsite.
The minimum and maximum layer thickness will be as specified by CDOT Specifications for the type of
asphalt mix being used, or as otherwise specified in an approved pavement design report. The use of
geosynthetics associated with asphalt pavement or mill/overlay operations will be approved by the
engineer prior to use.
10.7.4 Concrete (PCCP) Surfaces
PCCP construction is encouraged for high -volume intersections, industrial developments, and heavy
truck routes. CDOT Specifications Section 412 provides material specifications and construction methods
generally acceptable to the department. Prior to any concrete placement, the contactor shall submit
construction plans which follow all the requirements in this guide but also include a joint layout plan and
a construction phasing plan. The following standards including but not limited to the following shall be
included in the project:
1. The Contractor shall also submit an optimized gradation concrete mix design to be reviewed and
approved by the County.
2. A PCCP design shall be provided using the mechanistic empirical (ME) design criteria. If the
recommended pavement thickness is less than } inches, the minimum concrete thickness
shall be n inches. If the recommended concrete pavement thickness is more than 119 inches,
the greater thickness shall be used. The minimum thickness of Class 6 ABC is 6 inches unless a
greater thickness is recommended by the design.
3. A minimum of 1 layer of Tensar TX 160INTERAX NX650 geogrid or approved equivalent shall be
placed beneath the Class 6 ABC and the subgrade on all PCCP project. The manufacturer's
requirements for overlap shall be followed. Additional layers of TX 160 INTERAX NX650 shall be
required if stability and compaction of the subgrade cannot be achieved.
4. The concrete mix design shall contain no more than 20% fly -ash
5. Only non -chloride High early strength concrete mix designs may be used in some situations if
submitted and approved by the County prior to construction.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 146
6. All acceleration and deceleration lanes shall have a 4 -foot PCCP shoulder and a 2 -foot gravel
shoulder. The gravel shoulder shall be composed of either Class 6 ABC or RAP.
7. All other PCCP travel lanes shall have an 8 -foot PCCP shoulder and a 2 -gravel shoulder.
8. A safety edge is required for the full length of the PCCP lanes except at driveway locations.
9. If an existing PCCP road is being widened, the existing safety edge and shoulder shall be
removed prior to the construction of additional lanes. The additional lanes shal be constructed
with a safety edge.
10. The minimum 28 -day flexural strength for concrete paving shall be a minimum of 65O psi. Any
concrete paving found to be less than this shall be removed and replaced.
11. All other material submittals such as aggregates, cement, joint sealant, curing compound, dowel
bars, and tie bars shall be approved by the County prior to any concrete being placed.
12. Non -flexible fusion bonded epoxy coated (purple or black) carbon steel bars (dowels) shall be
used in the wheel paths for load transfer between panels. The Simplex Time Capsule or
ArmorCoat dowel bars are acceptable.
13. Dowel bar sizes vary depending on pavement thickness and expecting loading. Never to be less
than 1.25".
13.14. All epoxy coated Tie Bars used in concrete pavement jointing will have no bare steel
ends and require coating of epoxy paint prior to placement.
4 .15. The transition between PCCP and HMA shall follow the Weld County PCCP to HMA
transition detail.
15.16. Concrete paving shall be finished using a moistened doubled burlap drag for texture.
Concrete texturing shall occur prior to curing compound being placed.
16.17. All non-standard sized concrete panels shall be reinforced with 6 -gauge welded wire
mesh
17,18. Concrete curing compound shall be White Water Linseed Oil Concrete Curing and Anti-
spalling Compound or approved equivalent.
18.19.
19.20.
Joint sealant shall be Dow Corning 89O SL joint sealant or approved equivalent.
Pavement markings placed onto finished concrete pavement shall follow Table
10 liable 10 1 below.
Table 10-1 Pavement Marking Types on Asphalt and Concrete Roadways
Surface Type
Line Type
Material
Type
CDOT
ITEM
#
Existing
6" White
Edge
Line
Modified
Epoxy
627-00008
4"
Yellow
Edge
Line
Modified
Epoxy
627-00008
4"
Double
-Yellow
Centerline
Modified
Epoxy
627-00008
4"
White
Extension
Line
Modified
Epoxy
627-00008
Asphalt
I
4"
White
Skip
Lane
Line
Modified
Epoxy
627-00008
8" White
Gore Area
Modified
Epoxy
627-00008
8" White
Channelizer
Modified
Epoxy
627-00008
8" White
Lane
Drop
Modified
Epoxy
627-00008
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
PAGE 1147
New Asphalt
Existing & New
Concrete
8" White
Double
-Left
Guide
Modified
Epoxy
627-00008
Stop
Bar/Xwalk
Preformed
Thermoplastic
(Inlaid)
627-30411
or
or
Preformed
Plastic
Type
y
I
627-30328
(Inlaid)
Word
Message/Symbol
`
y
Preformed
Thermoplastic
(Inlaid)
627-30407
or
or
Preformed
Plastic
yp
Type
I
627-30323
(Inlaid)
6" White
Edge
Line
Modified
Epoxy
627-00008
1
4"
Yellow
Edge
Line
Modified
Epoxy
627-00008
4"
Double
-Yellow
Centerline
Modified
Epoxy
627-00008
4"
White
Extension
Line
Modified
Epoxy
627-00008
4"
White
Skip
Lane
Line
Modified
Epoxy
627-00008
8" White
Gore
Area
Modified
Epoxy
627-00008
8" White
Channelizer
Modified
Epoxy
627-00008
8" White
Lane
Drop
Modified
Epoxy
627-00008
8" White
Double
-Left
Guide
Modified
Epoxy
627-00008
Sto
p
Bar/Xwalk
Preformed
Thermoplastic
(Inlaid)
627-30411
or
627-30328
or
Preformed
Plastic
Type
I
(Inlaid)
Word
Message/S
`
y mbol
Preformed
Thermoplastic
(Inlaid)
627-30407
or
or
Preformed
Plastic
Type
I
(Inlaid)
627-30323
6" White
Edge
Line
Preformed
Plastic
Type
II
(Inlaid)
627-02010
4"
Yellow
Edge
Line
Modified
Epoxy
627-00008
4"
Double
-Yellow
Centerline
Modified
Epoxy
627-00008
4"
White
Extension
Line
Modified
Epoxy
627-00008
4"
White
Skip
Lane
Line
627-02010
Preformed
Plastic
Type
II
(Inlaid)
8" White
Gore Area
Modified
Epoxy
627-00008
8" White
Channelizer
Preformed
Plastic
Type
II
(Inlaid)
627-02010
1
8" White
Lane
Drop
627-02010
Preformed
Plastic
Type
II
(Inlaid)
8" White
Double
-Left
Guide
627-02010
Preformed
Plastic
Type
II
(Inlaid)
Stop
Bar/Xwalk
Preformed
Thermoplastic
(Inlaid)
627-30411
or
or
Preformed
Plastic
Yp
Type
I
627-30328
(Inlaid)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
Ar. X148
Word
Message/Symbol
Preformed
Thermoplastic
(Inlaid)
627-30407
or
or
Preformed
Plastic
Type
yp
I
627-30323
(Inlaid)
Rollover
Curb
in
Roundabouts
Modified
Epoxy
— Yellow
with
627-00008
reflective
beads
Paveme
Materia
at
I
Pavement
Marking
Material
Type & Placement
Existing
46"
White
Edge
Line
Epoxy
46"
Yellow
Edge
Line
Epoxy
4"
Double
-Yellow
Centerline
Epoxy
4" White
Extension
Line —
Match
kne width
being
Epoxy
extended
8" White
Gore Area
r r
�t
tic
T
I
iroc
& New
Trrc
Applied).
ype
Concret
e
8" White
Channelizer
Preformed
Plastic
Type
I
(Surface
Applied}
8" White
Lane Drop
Preformed
Plastic
Type
I (Inlaid)
8" White
Double
Left Guide
Preformed
plas-ti£
Type
I (I-nlaid)
Stop
Bar/Symbol
Preformed
Plastic
Type
I
(Inlaid)
Word
Message
Preformed
Plastic
Type
I
(Inlaid>
20.21. For epoxy pavement markings, the concrete curing compound must be removed along
the marking layouts prior to placement of the epoxy. This can be accomplished using
pressurized water or other methods as approved by the County.
The County reserves the right to perform a site visit and inspect the facilities of any material supplier
used during construction. The contractor shall furnish copies of certified load tickets for the pavement
materials as proof that the correct type and quantity of pavement materials were delivered to the
jobsite.
Traffic control requirements for PCCP construction are a major concern because of the co-icrete curing
time requirements.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 149
10.7.5 Pavement Cut and Patching Requirements
Some roadways in Weld County have a "No Cut" policy in place. Consult with the Public Works
Department to find out which roads fall under this policy. Construction work that requires removal of
existing paved surfaces will require replacement with similar new pavement materials within a period of
48 hours, unless otherwise approved by the inspector. Traffic control devices will not be removed until
after the paved surface has been replaced. Removed RAP surfaces will be replaced with HMA.
Where pavement is to abut existing pavement, the existing pavement shall be removes to a neat vertical
line, using a saw or other method as approved, to create a clean construction "T -Joint". The contractor
will also be required to paint the edge with diluted emulsified asphalt (slow setting) prior to paving
operations. The rate of application shall be as determined by the engineer at the time of application.
Contractor shall mill existing roadway to a minimum depth of 2 inches. The milling shall be a minimum
of 2 feet wide or a greater width so that the joint will not fall within the intersecting travel lane wheel
path
Construction in the winter will require temporary asphalt patching using cold -mix materials, then
returning to the site to reconstruct with permanent patching using hot -mix materials when weather
conditions allow. All pavement removals will be saw -cut a minimum of 1 foot wider than the patching
area. The new pavement patch material will be placed and compacted to a thickness at least 1 inch
greater than the adjacent in -place pavement. The minimum dimension of both length and width of any
pavement patch will be at least 4 feet to ensure adequate compaction can be obtained. The inspector
may choose to waive the requirement for pavement surface materials testing if they believe that proper
construction methods are being used to ensure good compaction.
Pavement cut and patching requirements for concrete pavements will require review and approval by
the inspector. Concrete patching typically requires insertion of steel dowel bars into the adjacent
pavement. Proper curing and jointing methods also must be used.
Improper construction of pavement patches is a problem in Weld County. Poor construction methods
may result in dangerous bumps or dips in the traveled roadway. If such conditions are identified by the
department within two years after construction, the contractor will be notified in writing to reconstruct
the pavement patch properly. Failure to meet the conditions described in the written notice from the
department can result in emergency repairs being performed by County crews. In such cases, the
contractor will be invoiced to reimburse the County for all costs associated with the road repairs.
10.8 STRUCTURES AND DRAINAGE FEATURES
10.8.1 Bridges
Unless otherwise approved by the engineer, bridges will be designed and constructed according to the
most current requirements of AASHTO's LRFD Bridge Design Specifications, CDOT's Bridge Design
Manual, CDOT Standard Specifications, and CDOT Standard Plans. If alternate designs or construction
methods are being proposed by the contractor, the engineer will provide specific submittal
requirements. The design and construction of any bridge within the County right of_ way will be
overseen by a Professional Engineer licensed in the state of Colorado.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1_50
10.8.2 Culvert and Pipe Installation
Culvert and pipe installation will be completed according to the requirements of CDOT Saecifications
Section 603 and Standard Plans, unless otherwise described in Chapter 5.6.4 and Chapter 5.8 of this
document. Pipes constructed in right of ay for private driveway access in rural areas will be at least
CMP, or an approved equal, and will have a minimum diameter of 15 inches. Pipes constructed under
the travel lanes of a new public roadway will be RCP, or an approved equal, and will have a minimum
diameter of 15 inches. All culverts and pipes must be installed with a minimum of 12 inches of cover
above the pipe crown and bell to the bottom of asphalt at the edge of pavement (for paved roads) and a
minimum of 12 inches of cover above the pipe crown to the top of the finished grade (for gravel roads).
If 12 inches of cover is not possible, the culvert material must be rated for a minimum of HS -20 loading
or the largest expected loads crossing it (i.e., oil rigs, semi -trucks, etc.).
The contractor must provide shop drawings for any precast concrete box culvert (CBC), which will be
reviewed and approved for use by the engineer. HDPE, ADS, or other plastic pipes that cannot withstand
fire will not be allowed.
It will be the responsibility of the contractor to protect pipe materials from damage during shipping,
unloading, and installation. Any damaged pipe materials (as determined by the inspector) will be
removed from the jobsite. The construction elevation tolerance for pipes will be within 0.5 inches of the
design elevation called for on the approved plans.
10.8.3 Curbs, Gutters, and Crosspans
Construction will be according to the requirements of CDOT Specifications Section 609 and Standard
Plans, or as otherwise described in Chapter 5 of this document. All curbs, gutters, and crcsspans will be
constructed of CDOT Class D concrete or an approved equal. All gutters and cross pans shall be 8" thick
minimum. Asphalt curbs are permitted for bridge construction only.
All outflow curb and gutter will be CDOT Type 2 —Section IB, unless otherwise approved. All inflow curb
and gutter will be CDOT Type 2 —Section IIB, unless otherwise approved. All mountable curb shall be
CDOT Type 2 Section IM or Section IIM, unless otherwise approved. All crosspans will be CDOT Gutter
Type 2 with a minimum thickness of 6 inches, unless otherwise approved. The minimum vertical slope
for all gutters and crosspans will be 0.5 percent. Minimum width of 8 feet.
10.8.4 Concrete Structures, Manholes, and Inlets
Construction will be according to the requirements of CDOT Specifications Section 601 and Standard
Plans, or as otherwise described in Chapter 5.6 of this document. All irrigation structures will be
reviewed and approved by the applicable irrigation company or board prior to construction.
All concrete structures, manholes, and inlets will be constructed with steel reinforcement as shown on
the approved construction plans. The contractor will be responsible for concrete quality control testing
for all cast -in -place concrete construction. The contractor will request an inspection of the concrete
formwork by the inspector a minimum of 24 hours prior to concrete placement.
10.8.5 Retaining Walls and Slope Stabilization Measures
Any retaining walls 4 feet tall or higher that are to be constructed in the right--of--way will be designed
(and designs will be stamped) by a Professional Engineer licensed in the state of Colorado. The
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 151
contractor will submit detailed plans for approval by the department prior to construction. Retaining
wall foundations must follow the recommendations provided by the geotechnical engineer. Modular
block retaining walls will be constructed per the manufacturer's specifications. Retaining walls will be
located such that they ensure adequate clear distance from the wall to the edge of the roadway and so
do not pose a risk to the traveling public. Any retaining wall constructed in an urban or residential area
and greater than 4 feet in height will incorporate a railing or fence for fall protection.
Non-structural erosion control measures for slopes (blankets, turf reinforcement mats, etc.) will be
installed per the manufacturer's specifications. Structural slope stabilization measures (riprap, gabions,
soil anchors, slope mattresses, etc.) will be designed, and designs will be stamped, by a Professional
Engineer licensed in the state of Colorado. The contractor will submit detailed plans for approval by the
department prior to construction.
10.9 OTHER ROADWAY FEATURES
10.9.1 Pavement Markings
All roadways and bridges constructed will receive permanent pavement markings (striping) prior to the
construction traffic control devices being removed. The contractor will ensure that all pavement
markings have been designed and located according to the requirements of the MUTCD. All permanent
line striping will be done with epoxy paint materials applied according to the manufacturer -
recommended methods at 15 mils minimum thickness, unless otherwise approved by the department.
Both pavement and air temperatures will be at least 50 degrees and rising at the time of pavement
marking. All permanent words, symbols, stop bars, crosswalks, etc., will be pre -formed thermoplastic
pavement markings capable of being affixed to the asphalt pavement surface by heating, unless
otherwise approved by the department. The minimum pavement and air temperature will be as
recommended by the manufacturer. The contractor will submit a copy of the manufacturer installation
recommendations to the inspector prior to application.
10.9.2 Traffic Control Devices (Signs and Signals)
Installation of all permanent traffic control devices within the right-of-way is to be approved and
overseen by the department. Traffic control device materials and manufacturers will meet the
requirements of CDOT Specifications Section 713 and the latest version of the MUTCD. Installation of
traffic control devices will meet the requirements of CDOT Specifications Section 614 and the latest
version of the MUTCD.
Construction of traffic signals within the right-of-way with the intention of turning over ownership of the
traffic signal to the County will require specific design guidance and approval by the department.
10.9.3 Trees and Plantings
Weld County does not encourage the placement of any trees or plantings within the right-of-way that
require an irrigation system. Any trees or plantings proposed to be used will be able to survive under
non -irrigated conditions.
Trees and plantings will be located such that they do not present a safety hazard to the traveling public
by ensuring adequate clear zone distance from the trees and plantings to the edge of the roadway.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 152
Trees and plantings will be of the species and varieties previously approved for use by the department.
The contractor will obtain certificates of inspection of plant materials that are required by federal, state,
or local laws, and will submit the certificates to the department for approval prior to planting. All
delivered plant materials will be free from plant diseases and insect pests. All plant materials are subject
to the two-year warranty period. The contractor is responsible for removing and replacing any dead
plant materials that have been identified by the department prior to the end of the warranty period.
10.9.4 Sidewalks and Trails
Any permanent sidewalk, bikeway, or trail within the right-of-way will be constructed with concrete or
HMA, with a minimum thickness of 4 inches. The minimum width of the completed surface will be
5 feet. All completed surfaces will have a maximum cross slope of 1.8 percent to ensure proper drainage
and comply with the Americans with Disabilities Act (ADA). Sidewalks will be constructed with concrete
curb ramps and will comply with ADA requirements.
Before any surfacing is placed, clearing and grubbing, tree removal, grass and brush removal, and topsoil
removal will be completed. The existing ground then will be thoroughly compacted to not less than
90 percent of maximum density as determined by AASHTO T99. Materials testing requirements may be
waived by the inspector if the amount of sidewalk being constructed is minimal or the construction
methods being used are obviously adequate to ensure required results.
10.9.5 Guardrails
All new guardrail placed within the right-of-way will be CDOT Midwest Guardrail System (MGS). Any
contractor installing guardrail will be pre -qualified with CDOT for this specific type of construction (work
type 14). The contractor will be responsible for providing and maintaining traffic control devices until
the guardrail construction has been entirely completed, inspected, and approved for use by the
inspector.
10.9.6 Fences
New fences constructed within the right-of-way will be in accordance with CDOT Specifications Section
607 and Standard Plans No. M-607-1 (Wire Fences and Gates). In cases where a contractor is replacing
an existing fence, the adjacent landowner and the inspector should be consulted regarding acceptable
fencing materials. In all cases, the contractor will obtain permission to enter upon adjacent private land.
Construction of fences intended to be located on the right-of-way line will be surveyed and staked prior
to construction. If the locations of the right-of-way line or adjacent property lines are in question, the
department will be consulted for assistance. All fences will be designed and constructed in a manner
that does not adversely impact the sight distance for vehicles, especially near roadway intersections.
In urban or developed areas, standard barbed-wire fences are not the preferred type. Developers and
landowners can make use of many other fence types that will better fit the needs. The department will
be consulted and will review specific requests prior to construction.
The contractor will perform clearing and grubbing as necessary to construct the fence to the required
grade and alignment. At locations where fence posts or anchors need to be imbedded in concrete,
adequate bracing will be left in place until the concrete has hardened. The tops of all posts will be set to
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA P A v E 1153
the required grade and alignment. Avoid cutting off the tops of treated wooden posts. All gates will be
galvanized steel or factory -painted, unless otherwise approved.
10.9.7 Cattle Guards
In Weld County, cattle guards are used to keep cattle or other grazing animals off the right-of-way. New
cattle guards constructed within the right of wayright-of-way will be in accordance with CDOT
Specifications Section 611 and Standard Plans No. M-611-1 (Cattle Guard). A written agreement similar
to the agreement found in Appendix 8-C of the Weld County Code must be received by the Public Works
Department prior to installation. The contractor will obtain permission to enter upon adjacent private
land, if necessary, for construction and will make arrangements for temporary access with the affected
landowner(s).
The deck area of all cattle guards will be constructed of steel, and all hardware will be galvanized steel.
The contractor will ensure that concrete has sufficient time for curing and strength gain prior to allowing
traffic to use the new cattle guard. The contractor will be responsible for providing a temporary means
of controlling cattle or other grazing animals during construction.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 154
CHAPTER 11 PERMITTING
The following permits are issued by the Public Works Department or the Planning and Zoning
Department, as indicated. Additional information regarding any of the permits, including application
forms, can be found on the Weld County website.
11.1 TRANSPORT PERMIT
The Transport Permit is issued by the Public Works Department and is required when vehicles using the
County road network are overweight, over -sized, or both. It is issued for standard overweight or over-
sized load vehicles and for oil rigs drilling in the County. Permit conditions or restrictions may apply to
these vehicles and are listed on the application form. When a permit for this application is issued by
Weld County, the permit is subject to the conditions described with the understanding that no liability is
assumed by Weld County by reason of its issuance. With regard to the condition of roads or capacity of
culverts and bridges, the applicant must examine and inspect the adequacy of roads and bridges for
traffic movement. In case of an emergency, an authorized Weld County employee or an authorized
agent may suspend the permit until emergency conditions have passed. (See Weld County Code,
Chapter 8, Article XV, Sec. 8-15-10, et seq.)
11.2 RIGHT-OF-WAY USE PERMIT
The Right -of -Way Use Permit, issued by the Public Works Department, is a tool to help regulate
unauthorized obstructions of, excavations in, and use of the County's rights of way and easements by
requiring permits for all construction activities within the Weld County rights of way or easement and
provide for the subsequent restoration upon completions. A Right -of -Way Use Permit grants a permit
holder permission to occupy, excavate, survey, perform locations, or construct facilities within the
County rights of way or easements and provide for the subsequent restoration upon completion. (See
Weld County Code, Chapter 8, Article XIII, Sec. 8-13-10, et seq.)
Right-of-way Use Permit instructions and application can be found at:
httos://www.weld.&ov/Government De
partments/Public-Works/Permits/Right-of-Way-Permits.
11.3 ACCESS PERMIT
Land use, natural resources recovery, general utilities, and development have impacts on County roads.
The requirement for Access Permits, issued by the Public Works Department, recognizes that the
efficiency and safety of County roads depends on minimizing roadside interference and its detrimental
effect upon the movement of traffic. The Access Permit sets out minimum requirements for the design,
construction, and maintenance of accesses. (See Weld County Code, Chapter 8, Article XIV, Sec. 8-14-10,
et seq.)
11.4 GRADING PERMIT
The Grading Permit, issued by the Public Works Department, is a tool to ensure that the County has
reviewed the grading plan, the erosion and sediment control plan, and the utility map for proposed
construction activities with the goal of avoiding potential damages. A Grading Permit grants the Permit
Holder permission to conduct construction activities within the requirements of applicable state
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1155
regulations and provides the County with sufficient oversight to minimize the potential for offsite
damages.
A Grading Permit will be required if disturbing more than one acre or any earth disturbance in an MS4
area per the MS4 criteria within this document. (See Weld County Code, Chapter 8, Article XII, Sec. 8-12-
10, et seq.)
11.5 FLOODPLAIN DEVELOPMENT PERMIT
The Floodplain Development Permit is issued by the Planning and Zoning Department. (See Weld County
Code, Chapter 23, Article XI, Sec. 23-11-200, et seq.)
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 156
CHAPTER 12 VARIANCE REQUESTS
The County recognizes that in certain limited instances it may be exceptionally difficult tp conform to
the criteria set forth in this manual and the Weld County Code. The County will consider requests for
variances on a case -by -case basis. The variance request will be submitted in a written attachment to the
initial submittal of construction plans. Drainage variances are addressed in Section 8-11-160 of the Weld
All other requests will
consist of the following:
1. Identification of the criteria or Weld County Code section to be waived or varied
2. Identification of the construction criteria adhered to
3. Justification for the variance, which will demonstrate the following:
• Hardship is created if the variance is not approved. The hardship shall be specific to the
subect property, rather than general in nature such as cost, and shall not have been self-
imposed by the applicant or their predecessors in title to the property.
• There will be only minimal impact on public safety.
• The variance is not contrary to best engineering practices.
• The variance is not contrary to the intent and general purpose of these criteria and the Weld
County Code.
• The variance does not result in a significant impact to the public due to maintenance of the
improvement.
• The variance does not result in a significant impact to the aesthetic appeararce of the
improvement.
• The variance is the minimum exception from the criteria necessary to afford 'elief from the
hardship.
• The variance is reasonably necessary for the health, safety, and welfare of the public.
The variance request shall will be prepared, stamped, signed, and dated by a professions civil engineer
licensed to practice in the State of Colorado. Requests will be reviewed by the Public Works Director or
his/her designee. The Public Works Director, or his or her designee, shall only approve the variance
request if the applicant has demonstrated the justification required above.
The Public Works Director reserves the right to deny, or allow his or her designee to deny, any request
for variance if doing so is in the interest of public health, safety, and welfare.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE 1157
This page intentionally left blank.
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA PAGE I 158
APPENDIX A - Weld County Drainage Basin Map
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
APPENDIX C - CDOT Operations and Maintenance Plan Guidelines
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
APPENDIX F - Rational Formula -Based Modified FAA Procedure
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
APPENDIX H - MS4 Pollution Prevention Plan Checklist and Manual
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
APPENDIX' - Weld County Standard Details
WELD COUNTY ENGINEERING & CONSTRUCTION CRITERIA
Hello