HomeMy WebLinkAbout20142304.tiff SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL
REVIEW (USR) APPLICATION
FOR PLANNING DEPARTMENT USE p TE RECEIVED:
RECEIPT#/AMOUNT# /$ L- _' CASE#ASSIG ED: 1.
APPLICATION RECEIVED BY .1"jh PLANNER ASSIGNED:
Parcel Number 1 4 7 1 2 7 0 0 0 0 3 3
(12 digit number-found on Tax I.D.information,obtainable at the Weld County Assessor's Office,or www.co.weld.co.us)
Legal Description Part of W 1/2 of the SE 1/4 , Section 2V, Township 1 North, Range 66 West
Zone District:AG , Total Acreage: '/-23.3 , Flood Plain: No , Geological Hazard: No
Airport Overlay District: No
FEE OWNER(S) OF THE PROPERTY:
Name:CKG INCORPORATED
Work Phone# 303-525-1320 Home Phone# 303-655-9729 Email ckgoens@q.com
Address: 15653 County Road 4
Address:
City/State/Zip Code Brighton, CO 80603
Name:
Work Phone# Home Phone# Email
Address:
Address:
City/State/Zip Code
Name:
Work Phone# Home Phone# Email
Address:
Address:
City/State/Zip Code
APPLICANT OR AUTHORIZED AGENT(See Below:Authorization must accompany applications signed by Authorized Agent)
Name:Chad Goens
Work Phone# 303-525-1320 Home Phone# 303-655-9729 Email ckgoens@q.com
Address: 15281 Wagon Wheel Dr
Address:
City/State/Zip Code Brighton, CO 80603
PROPOSED USE:
RV& Boat Self Storage Facility
I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted
with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all
fee owners of property must sign this application. If an Authorized Agent signs, a letter of authorization from all
fee owners must be included with the application. If a corporation is the fee owner, notarized evidence must be
included l indicating that the signatory has to legal authority to sign for the corporation.
elt 4l� J do 144 5/2./20/4
Signature: Owner or Authorized Agent Date Signature: Owner or Authorized Agent Date
USR Questionnaire
USR 14-xxxx
The following questions are to be answered and submitted as part of the USR application.
If a question does not pertain to your use, please respond with "not applicable",with an
explanation as to why the question is not applicable.
1. Explain, in detail,the proposed use of the property.
The proposed use of this property is for RV& Boat storage facility with outdoor, covered, and
indoor storage (to include mini self storage) of recreational items (such as RVs, boats with
trailers, ATVs, vans, stand-alone campers, motorhomes, 5th-wheel trailers, small, medium, and
large pick-up trucks with, or without, attached campers, and other similar items including
industrial or commercial vehicles, heavy equipment, and materials). Items listed above may be
stored inside or outside to accommodate customer needs. The site will also contain and office
that will have an area designated for the storage of equipment and supplies used for the
maintenance and up-keep of the property. Signage will be along CR 4 and will be provided by a
freestanding sign that will be 6'or less in height
2. Explain how this proposal is consistent with the intent of the Weld County Code,
Chapter 22 (Comprehensive Plan).
Section 22-2-170.B C.Goal.2—Encourage the expansion and diversification of the commercial
economic base.
Section 22-2-170.C. C.Goal.3—Address the compatibility of commercial land uses with adjacent
land uses.
Section 22-2-170.C. C.Goal.3. 2.C.Policy.3.2—New commercial development should
demonstrate compatibility with existing surrounding land use in terms of general use, building
height, scale, density traffic, dust and noise.
Commercial storage will provide expansion of the commercial economic base. The use will be
compatible with adjacent land uses as there is an existing power utility substation facility directly
to the east of the proposed property, a horse boarding facility directly to the east, a slaughter
house directly to the southeast of the proposed property(which is currently zoned industrial), a
large oil and gas transfer station % mile to the west, and Vesta's manufacturing plant at the
intersection of CR4 and Old Brighton Rd.
3. Explain how this proposal is consistent with the intent of the Weld County Code,
Chapter 23 (Zoning) and the zone district in which it is located.
Section 23-3-40.S of the Weld County Code allows any use permitted as a Use by Right, an
Accessory Use, or a use by Special Review in the commercial or industrial zone districts.
4.What types of uses surround the site? Explain how the proposed use is consistent and
compatible with surrounding land uses.
North— Section 23-3-20.A Uses Allowed by Right— One Single Family Dwelling Unit-
West— Section 23-3-20.A Uses Allowed by Right— One Single Family Dwelling Unit
Section 23-3-30.K Accessory Use— Cargo container as Accessory Structure
Section 23-3-30.Q Accessory Use— Second Single Family Dwelling
East— Section 23-3-20.T Uses Allowed by Right-Animal Boarding
Section 23-3-30.B Accessory Use—Buildings for confinement or protection of livestock
Section 23-3-30.P Accessory Use— Telecommunication Antenna Tower
Section 23-3-40.D.3 Uses by special review— Major Public Utilities facility- (Owned by Tri-State
Generation & Transmission Assoc. Inc. and approved as USR permit#1711, applicants Dustin
and Page Clark&Norma Jean Ritchey c% Tri-State Generation and Transmission Association,
Inc.)
South— 23-3-20.G— Uses allowed by right— Grazing of livestock
Proposed site will utilize screening, control dust, light, and noise pollution to be compatible with
existing uses. Daily traffic will be consistent with neighboring uses. Proposed site will make a
diligent effort to conserve agricultural land by ensuring adequate provisions are in place for the
protection of health, safety, and welfare of the surrounding properties and County.
5. Describe, in detail, the following:
a. Number of people who will use this site
Maximum people expected on site at any given time are 5-10 people.
b. Number of employees proposed to be employed at this site
Up to one part time employee is proposed at this site, beginning in phase 2. The idea is to use
technology to run the site. (i.e telephones, internet, email, texting) Many of the day to day tasks
can be done remotely once the site is operational and will be performed by the owner/operator.
c. Hours of operation
Hours of operation will be, 7 days a week, 24 hour access.
d. Type and how many structures to be erected (built) on this site
initially only one structure will be built on site, a small office/maintenance building, and will be
constructed during Phase 1. Build out of additional storage buildings or canopies will depend on
market demand and will start in Phase 2. During Phase 2, a water well will be drilled and running
water supplied to the office building, the septic system will be constructed in accordance with the
requirements of the Weld County Code pertaining to Individual Sewage Disposal Systems
Regulations, four enclosed buildings will be erected(two will be for mini self-storage and two will
be for larger items), and a 10,000 gallon water storage tank will be installed for fire protection).
During Phase 3, two covered canopy structures will be erected, two additional enclosed buildings,
and an additional 10,000 gallon water storage tank will be installed for fire protection. At full build
out the maximum number of buildings on site will be seven enclosed buildings and two canopies.
e. Type and how many animals, if any, to be on this site
Not applicable- there will be no animals on this site.
f. Kind of vehicles (type, size,weight)that will access this site and how often
Recreational storage will include pick-up trucks pulling boats, pick-up trucks pulling campers, and
motorhomes. Boat sizes (trailer length) will likely be between 25'and 35'and weigh between
2,500 lbs and 4,500 lbs. Pulled campers (5m Wheels and trailers) can range in size from 20'to 40'
and weigh between 3,500 lbs and 12,000 lbs. RVs range in size from 25'to 40'and weigh
between 10,000 lbs and 24,000 lbs. Commercial storage may include small trucks/vans to semi-
trucks and trailers. The site will be accessed by 10-35 vehicles per day.
g.Who will provide fire protection to the site
The subject property is under the Greater Brighton Fire Protection district boundary.
h.What is the water source on the property (both domestic and irrigation)
Well water under a State of Colorado issued well permit will be providing water to the site for all
uses.
I. Sewage disposal system on the property (existing and proposed)
"Existing" No sewage disposal system is located on the property.
"Proposed"; an engineered system will be designed per Weld County Codes. And will be built in
the second phase of construction. During Phase 1 a porta-toilet will be utilized and will be
serviced on a bi-weekly basis as needed. The porta-toilet will be removed once Phase 2 is
completed.
j. If storage or warehousing is proposed,what type of items will be stored?
Larger units will store all types of recreational items, including but not limited to RVs, camping
trailers, boats, ATVs and jet skies. Smaller mini-storage units will store personal/household
items (furniture, clothing, etc.).
6. Explain the proposed landscaping for the site. The landscaping shall be separately
submitted as a landscape plan map as part of the application submittal.
Along the south edge, adjacent to CR4, we are proposing approximately-40 feet of native
grasses and-10 feet of rock and/or mulch up to the front fence, The front privacy fence will be 6
to 8 foot tall and consist of stone/masonry columns connected with cedar pickets or similar. The
east, north, and west privacy fence will consist of a 6 to 8 foot tall chain link fence with vinyl slats
installed to provide screening to adjacent properties and will follow the property lines. If the fence
is offset from the property line the area outside the fence will be maintained and landscaped with
one of the following; native grasses, rock, gravel or mulch. Trees will be planted in the southern
most property corners, with groupings of small bushes and shrubs every 50-75 feet.
7. Explain any proposed reclamation procedures when termination of the Use by Special
Review activity occurs.
Should the facility be permanently discontinued it would be marketed under applicable county
planning and zoning regulations to its greatest and best use.
8. Explain how the storm water drainage will be handled on the site.
Currently the site itself is mostly higher ground than surrounding properties. No storm water from
neighboring properties will drain onto, or through, the site. The site itself is made up of four small
sub-basins. One (2.44 acres) is in the southwest corner of the site and drains off to the west. The
second(11.42 acres), and largest basin also drains off to the west and encompasses the
southeast corner through most of the middle of the site toward the north end. The third(3.05
acres) takes up a portion of the middle of the site on the east side and also drains off towards the
east. The fourth (6.27 acres) is in the northeast corner of the site and drains off to the north near
the northeast corner. Historic flow patterns with be maintained as much as possible to maintain
historic discharge onto the neighboring property. Details can be found in the drainage report
included with this application.
9. Explain how long it will take to construct this site and when construction and
landscaping is scheduled to begin.
Construction will begin within 1 year of USR permit approval. Construction of the First phase will
be completed in 12-18 months. Landscaping will begin in conjunction with the First phase and will
be completed shortly after the rough grading is completed. The Second phase will depend on
customer demand and will start when the First phase is at approximately 75%capacity. The third
phase will also be dependent on customer demands.
10. Explain where storage and/or stockpile of wastes will occur on this site.
No stockpiling will occur
11. Please list all proposed on-site and off-site improvements associated with the use
(example: landscaping, fencing, drainage,turn lanes, etc.) and a timeline of when you will
have each one of the improvements completed.
Improvements to the site will begin within 12 months of USR approval. Phase 1 will construct the
retention pond and grade the property in accordance with the drainage plan submitted, improve
the property access (install all weather surface, layout parking spaces, and off-road staging area),
build the office, install fencing around the perimeter of phase 1, install access gates, and
landscape the CR4 frontage. Phase 2 construction will depend on customer needs and will grade
the property in accordance with the drainage plan submitted, fence the perimeter of Phase 2,
erect four enclosed building, drill water well, and install an individual septic system. Phase 3 will
construct the second retention pond and grade Phase 3 in accordance with the drainage plan
submitted, fence the perimeter of Phase 3, erect 2 covered canopies, and two additional enclosed
buildings. Completion of all construction should be completed within 5 years depending on
customer needs.
url gh ton Right Of Way Permit
500 South 4th Avenue Brighton,CO 80601 ROW Application
v✓ww.brighlonco.gov 303.655.2017
Date: 10/24/2013 Permit Number:
Contact Information
Company Name: CKG Incorporated
Company Address: 15281 Wagon Wheel Dr.
City: Brighton State: I CO Zip: 80603
Mailing Address: v Same as above
City: I State: Zip: L
Company Phone: 303-525-1320 Company Website:
Contact Name: Chad Goens
Contact Email: ckgoens@q.com Contact Phone: 303-525-1320
Property Owner Name: CKG Incorporated
Property Owner Email: ckgoens@q.com Property Owner Phone: 303-525-1320
Site Information
Job Address: SE Quarter of Section 27, Township 1 N, Range 66 W of the 6`h P.M. , County of
Weld, State of Colorado, also known as Weld County Parcel#147127000033
Subdivision: N/A
Filing: N/A Phase: N/A Lot: N/A Block: N/A
Installation of two culverts for ingress and egress access to Parcel#147127000033.All work will
be performed to the submitted plans and will be done from the property side to eliminate any
Description of Work: potential traffic impact. The culverts will be placed in the right of way ditch and covered with soil.
An all weather surface,CDOT class 6 recycled asphalt,will be a applied to the surface and will
border up to the edge of WCR 4.
Date work will begin: Upon permit issuance Bond/Letter of Credit #: Letter of Responsibility
Job Valuation: I $450.00 Bond/LOC Amount: $N/A
✓ Submittal Requirements
N/A Traffic Control Plan(must include schedule)
✓ Site Plan—showing location; and,approximate depth,length,width, extent, nature, and purpose
N/A Colorado Department of Transportation(CDOT)Permit—required if job is located in state ROW
N/A Complete list of equipment used on site for job scope(tree-trimming work only)
✓ Bonding Document
✓ Affirmation Statements/Signature please check that you have read and understand each statement ofaffirmation below
As the Licensed Contractor(Contractor) on any City of Brighton permit issued for construction, and by my signature
affixed hereto, I understand that:
✓ Contractor shall complete all work in conformance with all City, State,and Federal rules,regulations, and codes.
✓ Contact with the City Public ROW Construction Inspector shall be made 24 hours prior to construction.
✓ Public Utility Locates for existing utility lines will be made prior to construction.
✓ The City of Brighton reserves the right to void this permit at any time as may be deemed necessary.
N/A Trenching that has been backfilled without consent of the Inspector will be reopened at contractor's expense.
N/A No trench longer than 100 linear feet shall be opened during the day and no trench shall be left open overnight.
✓ Hours of construction are limited to 7:00 a.m. and 7:00 p.m.
Signature Printed Name
RevI20712ps
ROW Application
Page 2
Title Date
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(I) Installation/construction Basic
Sewer lines or lift station LF @25 LF $
Water lines LE @.25 LF $
Curb,gutter or attached walk LE @.25 LF $
Detached sidewalk LF @.25 LF $
New street paving LF @.25 LF $
Storm sewer LF @.25 LF $
Curb or driveway cut LE @.25 LF $
Other: @.25 LF $
Sub-total section(1)$
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(2) Asphalt or concrete cut Basic fee: 546.00 I
Asphalt/concrete cut LF @.25 LF $
Street closure only(GLI must be provided) t>/a n/a n/a
Sub-total section(2)$
(3) Miscellaneous Basic fcc: I $16.00
Boring/jacket/tunneling LF @.15 LF $
Gravel/undeveloped street/median landscape/unpaved alleys LF @.15 LF
V CulverUunpaved drive LF
Other:
Sub-total section(3): $
Total permit fees due: I $
OPenalties(double fees)are applied for doing work without permits—Advanced total: $
Bond Calculation Worksheet
The minimum bond requirement for any ROW work performed within the City of Brighton is$5,000 based on 115%of the job scope.
Please submit a copy of the awarded bid for your project or complete the table below to calculate the performance bond amount
required for any permit with a scope of work larger than$4,500.
A 20%increase shall appdrfiit each 5'inclement I, rnnil the initial 5'depth.
Total Total
Right of Way Permits Cost Per Units X Units Price Right of Way Permits Cost Per Units X Units Price
Curbs $22 LF X San sewer un to 12" $40 LF X
Detached sidewalk $11 LF X San sewer up to 24" $50 LF X
Cuff/gutter/sidewalk $44 LF X San sewer over 24" $75 LF X
Drive pan $44 LF X Storm sewer up to 12" $59 LF X
Water pipe up to 12" $30 LF X Storm sewer up to 24" $65 LF X
Water pipe up to 24" _ $75 LF X Stone sewer up to 36" $76 LF X
Water pipe up to 36" $125 LF X Stone sewer up to 42" $93 LF X
Water pipe over 36" $200 LF X Inlets $4.500 Ea X
Fire hydrants $3,500 Ea X Manhole up to 4'diameter $1,500 Ea X
Water tees.bends.etc. $500 Ea X Manhole up to 5'diameter $2,500 Ea X
Valves $2,000 Ea X Manhole up to 6'diameter $4,000 Ea X
Water service w/meter vault $1,500 Ea X Manhole up to 8'diameter $5,000 ea X
Column total= $ Column total= $
Project Total= $ + 15%= $ Total bond amount due for project= $
Bonding will be held until all work noted on this permit has been construction accepted. If a one-year warranty is required for this
scope of work, bonding will not be released to 15% for the one-year warranty period until all work on this permit is completed—no
partial releases will be approved. If work is expected to be released in separate stages, separate permit applications should be
submitted.
• Permit BP-13-01471
' _ - Bn h t®nCade In Effect:2012 International Codes 2011 NEC
' � AUTOMATED INSPECTION LINE(303) 655-2151
r�a
500 South 4th Avenue Brighton, CO 80601
www.brightonco.gov 303.655.2017
Date Issued: 11/07/2013
Parcel: 111111111111 Type: ROW - Construction
Job Address: 9876 ADD ADDRESS Brighton, CO 80601
Description of Work: Installation of two culverts for
ingress and egress access to parcel #147127000033 - All
work will be performed to the submitted plans and will be
done from the property side to eliminate any potential traffic
impact- The culverts will be placed in the right of way ditch
and covered with soil - An all weather surface, CDOT class
6 recycled asphalt will be applied to the surface and will
border up to the edge of WCR 4
Contractor: -
Owner: Chad Goens
Approved plans MUST be retained on the job and this card KEPT POSTED until final inspections have been approved.All
structures require a Final Inspection. Buildings may not be occupied until approved by the Building Official.
Notice
This permit becomes null and void if work or construction authorized is not commenced within 180 days or if construction or
work is suspended or abandoned for a period of 180 days at any time after work is commenced.
REQUIRED INSPECTIONS
Inspection Inspector Date
ROW/INF - Const Accept-Streets
ROW/INF - Final Accept-Streets
A-Cert of Completion
NOTICE: In addition to the requirements of this permit,there may be additional restrictions applicable to this property that may be
found in the public records of this county,and there may be additional permits required from other governmental entities such as water
management districts, state agencies, or federal agencies.
Permit Issued By: Sabrina Gutierrez Issue Date: 11/07/2013
48 HOURS BEFORE YOU DIC! Inspection requests must be recorded before
Call Blue Stakes, 1-800-922-1987 for Utility Locations 4:00pm for next-day inspection service.
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DUST ABATEMENT PLAN
USR 14-XXXX
During the construction phase of the project, Mountain View RV and Boat Storage will
maintain dust suppression by:
1) Converting the entrance to the site to a hard packed all-weather surface. This will
help eliminate dust and the tracking of soil onto CR4.
2) On-site vehicle speeds will be restricted to reduce the amount of dust generated.
3) Haul trucks entering and leaving the site will be required to have loads covered.
4) Unpaved roads will utilize water to control dust.
After the construction phase of the project, Mountain View RV and Boat Storage will
maintain dust suppression by:
1) Covering all access roads and drives with an all-weather surface, recycled asphalt.
2) Speed limits will be posted and strictly enforced to control dust.
3) Any disturbed soil will be stabilized with a native vegetation which will not be
allowed to grow over 12" high.
4) A water truck, if required, will be utilized to control dust.
Waste Handling Plan
USR 14-XXXX
Purpose
• The purpose of the plan is to project the quantities and types of waste that
will be generated through operation of Mountain View RV and Boat
Storage Facility and to detail the management and disposition of this
waste. The plan will further outline the operational chemicals that will be
stored on-site and that may require future disposal.
Objective
• The objective of this plan is to ensure waste generated at Mountain View
RV and Boat Storage Facility is managed according to all Local, State,
and Federal regulations. Further, the plan will define operational
chemicals used or stored on site requiring specific disposal pathways. The
plan is written to provide training and guidance to site workers to ensure
all materials are properly handled and disposed.
Chemicals Stored On Site
• NO chemicals will be stored on site.
Projected Waste Streams and Volume
• NO wastes are expected to be generated on site.
Waste Disposition
• Wastes will be collected in a trash dumpster located near the entrance of
the property. The trash will typically be picked up on a bi-weekly
schedule; this will be dependent on use and adjust to customer needs. The
dumpster will be screened by the property fence (solid cedar fence with
decorative columns across the entrance side of the property and slats will
be placed in the side perimeter property fence).
FOR COMMERCIAL SITES, PLEASE COMPLETE THE FOLLOWING INFORMATION
BUSINESS EMERGENCY INFORMATION:
Business
Name:Mountan View RV& Boat Storage Phone:303-525-1320
Address: 15653 County Road 4 City, ST, Zip: Brighton, CO 80603
Business
Owner: CKG Incorporated Phone:3030-525-1320
Home Address: 15281 Wagon Wheel Dr City, ST, Zip: Brighton, CO 80603
List three persons in the order to be called in the event of an emergency:
NAME TITLE ADDRESS PHONE
Chad Goens Owner/Manager 15281 Wagon Wheel Dr, Brighton, CO 80603 303-525-1320
Kelley Goens Owner/Manager 15281 Wagon Wheel Dr, Brighton, CO 80603 303-655-9729
Business
Hours:24-7 Days:7
Type of Alarm: None (Burglar Holdup Fire Silent Audible
Name and address of Alarm Company:TBD
Location of Safe:TBD
**********************************************f*************** *****************************************************************
MISCELLANEOUS INFORMATION:
Number of entry/exit doors in this building:TBD Location(s):TBD
Is alcohol stored in building?NO Location(s):
Are drugs stored in building?NO Location(s):
Are weapons stored in building?NO Location(s):
The following programs are offere a public service of the Weld Counrr riffs Office. Please indicate the
programs of interest. I Physical Security Check Crime Prevention Presentation
UTILITY SHUT OFF LOCATIONS:
Main Electrical:TBD(None at this time)
Gas Shut Off:TBD(None at this time)
Exterior Water Shutoff:TBD(None at this time)
Interior Water Shutoff:TBD(None at this time)
TST, INC. CONSULTING ENGINEERS
2111
May 2, 2014
Jennifer Petrik, P.E.
Weld County Public Works
1111 H Street
Greeley, CO 80632
Re: Drainage Narrative for the Diamond Valley Oil Terminal
Project No. 1204.0002.02
Dear Ms. Petrik,
Included herein is a drainage narrative for the Diamond Valley Oil Terminal project
located in the Diamond Valley area, north of the Kodak Plant and on the north side
of Eastman Park Drive. The property on which the project is located is
approximately 65-acres. Approximately 7-acres of the total 65-acres are being
used to develop the proposed oil facilities. This drainage narrative has been
prepared in accordance with the Weld County Public Works Drainage Narrative
and Water Quality Guidance handout and will address the following:
• Description of the historic stormwater flows across the property
• Where the stormwater originates if it flows onto the property from an offsite
source
• Where the stormwater flows to as it leaves the property
• Any previous drainage problems with the property
• Proposed Water Quality Feature
• Floodplain Management
Topography on the site generally slopes from northwest to southeast at 0.50%
slopes or less. Stormwater runoff is conveyed toward the southeast corner of the
property where it leaves the property through an existing 18" culvert which is
located approximate 316' west of the SE corner of the site. Runoff from this culvert
is discharged under Eastman Park Drive and onto the existing southern property.
760 Whalers Way There are two separate offsite sources of stormwater runoff that are currently
Bldg C,Suite 200 conveyed to the existing 18" culvert, the 100-yr overtopping from the John Law
Fort Collins,CO 80525 Ditch at the railroad tracks located along the north perimeter of the site, and the
970.226.0557 main pond metro release of the offsite detention and located at the southwest corner of the
970.226 0204 fax adjacent property to the east. During normal conditions (minor storm events), there
is no contributing offsite runoff from the John Law Ditch. However, because the
ideas@tstinc.com existing culvert under the tracks is undersized, runoff from 100-year storm event
warm.tstinc.com Y
■
and larger overtops the tracks and is conveyed south across the property to the existing 18"
culvert. (This information has been inferred from the Town of Windsor John Law Ditch Letter of
Map Revision (LOMR) map that is posted on the Town of Windsor's website.)
The existing detention pond on the adjacent property to the east currently sits in a hole relative
to the elevation of exiting 18" culvert. Runoff from this pond is pumped through the two existing
cmp storm drains located at the southeast corner of the proposed property, where it is conveyed
through the existing swale just south of the subject property to the 18" culvert.
According to the John Law Ditch LOMR, shallow ponding of less than 1-foot occurs at the
northwestern portion of the site. This ponding will not affect the proposed oil terminal facilities.
Since the overall imperviousness of the site will remain below 10% with the addition of this
proposed development, Weld County only requires a water quality feature to collect and settle
out contaminants prior to flowing offsite. To reduce the impact on the downstreamloffsite
facilities due to the additional stormwater runoff created from the proposed development, a
retention pond (sized only for the WQCV) will be provided onsite. All runoff from the proposed
development will be conveyed via sheet flow, swales and pipes to the proposed retention pond
prior to leaving the site. In addition as part of this drainage design, the additional runoff from the
proposed drill pad site (approximately 6.2-acres, currently in permitting) located just north of the
proposed oil terminal, was included in as part of the water quality capture volume. Excess
runoff that cannot be retained within the proposed retention pond will be released through the
existing 12" storm culvert under the existing access road, through the existing swale and to the
existing 18" culvert. See attached for all drainage calculations.
Floodplain Management:
Per the current FEMA effective floodplain map, the site is in Zone C area adjacent to the John
Law Ditch floodplain. However, based on a LOMR in process, and a review of the preliminary
maps published by FEMA last year, it will be in a Zone AE once the preliminary maps become
effective. The site was analyzed based on the current floodplain information.
After a review of the preliminary maps, the improvements were located in the southwest portion
of the site. This location placed them against an area on the west and south that is out of the
floodplain. Placing the improvements in this location kept them out of the primary flow path as
much as possible.
The model for the John Law Ditch floodplain was obtained from Weld County. The site is along
the Kodak LPath, between sections 10575 and 12100. A new cross section (10900) was added
thru the middle of the proposed site and was used to determine both a corrected effective water
elevation based on existing topography, and then a proposed effective water surface based on
the proposed improvements. Results of the analysis can be found attached and the water
surfaces are summarized in the following table:
Water Surface Elevation (ft)
Section Effective Corrected Effective Proposed Effective
12100 4770.96 4770.96 4770.96
10900 4768.93* 4768.42 4768.43
10575 4768.38 4768.38 4768.39
*Effective water surface elevation interpolated
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Adding an additional cross section between 10575 & 10900 resulted in a water surface that was
approximately 0.51' lower between the effective and corrected effective conditions. While the
model shows a 0.01' rise between the corrected and the proposed, it is our opinion that this is a
negligible rise and within the tolerances of the model.
We look forward to your review and can answer any questions you might have.
Respectfully,
TST, INC. CONSULTING ENGINEERS
Derek Patterson E.I.T. Eric M. Fuhrman, P.E.
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Diamond Valley Central Oil Terminal
Water Quality Capture Volume Calculation
Basin Imperviousness
Average Imperviousness
Basin Area(ac) Attribute Attribute Area(ac) Imperviousness(%)
(%)
Streets: Paved 0.18 100
Streets:Gravel 10.47 40
Diamond Valley 64.73 Roofs 0 17 90 8.65
Grass 53.91 2
Note: Of the 10.47-acres of gravel roadway,approximately 6.2-acres is for the additional onsite drill pad currently in permitting.
'Water Quality Capture Volume(WQCV)
WQCV(ft)=a(0.91 is-1.19'3+0.78i)/12
a 1
8.65
WQCV(ft) 42.18
Volume(ft3)=WQCV(ft)x Area of Site(ft2)
Volume(ft3) 2730.63
Minimum Surface Area(Drain Time=40-hr)
Volume(ft3) 2730.63
Drain Time(sec) 144000
Flow Rate(ft3/sec) 0.0190
'Hydraulic Conductivity(ft/sec) 4 6248E-06
Surface Area(ft)=Flow Rate(ft3/sec)/Hydraulic Conductivity(ft sec)
Surface Area(ft') 4100.22
`Hydraulic Conductivity based on USDA Web Soil Survey
Water Quality Capture Volume(WQCV)determined from equations and methodolgy set forth in the Weld County Public Works
Drainage Narrative and Water Quality Guidance Handout.
STAGE-STORAGE FOR IRREGULAR GEOMETRY
Project: Diamond Valley Central Terminal
Basin ID: Water Quality Pond
Design Information (Input):
From the pond site grading plan, enter water surface elevations
and measured contour areas in ascending order.
Water Eq-elev. Volume
Surface Contour above
Elevation Area Datum
ft square feet acre-ft
(input) (input) (output)
4763.50 8,680 0.0000
4764.00 9,358 0.1035
12" Outlet Elev. 4764.58[ 20,7941 0.3043
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WQ Volume Required (ac-ft) = 0.063
WQ Volume Provided (ac-ft) = 0.304
WQ WSEL = 4763.723
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