HomeMy WebLinkAbout20063539.tiff February 14, 2006 Weld County Planning Department
GREELEY OFFICE
SHEAR
Project No. 2136-01-04 FEB 17`2,006 ENGINEERING
O ONION
Weld County Public Works RECEIVED
ED
P.O. Box 758
Greeley, Colorado 80632
Attn: Peter Schei, P.E.
Re: Gold Stone Creek Minor Subdivision; Weld County (Pierce); Colorado
Response to July 29, 2005 Change of Zone Comments
Dear Mr. Schei,
This is a response to the most recent Weld County Public Works Department review comments
concerning Gold Stone Creek Minor Subdivision noted in a memorandum from you to Chris
Gathman dated July 29, 2005 prior to the reconfiguration of the proposed lots and Weld County
rights-of-way.
External Roadways:
❑ This development will introduce additional vehicle trips to the roadway system from the 9
proposed additional lots (approximately 85 vehicle trips to the roadway system). According
to the Gold Stone Creek Traffic Analysis (File: 0515ME01) by Matt Delich (PE 15263)
dated March 18, 2005, from Traffic & Transportation Engineering, "with the Gold Stone
Creek Development, the future average daily traffic will be well below the minimum
threshold of 200 VPD to require paving or treatment of WCR29. " Public Works is in
agreement with the findings of the report and no off-.site improvements'are required.
R. Acknowledged
❑ CR 29 is classified by the County (Weld County Roadway Classification Plait June 2002) as
a local gravel road (adjacent to the proposed development) and requires a 60 foot right-of-
way. The applicant has verified the existing right-of-way and the documents creating the
right-of-way have been noted on the change of zone plat. CR 29 is under the jurisdiction and
maintenance of Weld County.
R Acknowledged
o CR 94 does not exist adjacent to this development on the section line. The applicant has
submitted evidence of vacation of right-of-way recorded with the Weld County Clerk &
Recorder.
R. Acknowledged
internal Roadways:
❑ The applicant shall provide a pavement design prepared by a professional engineer along
with the final plan submittal.
R Acknowledged. Please reference the attached Geotechnical Engineering Pavement Report
by Terracon, dated February 7, 2006.
Z)),6-35-3g
4836 S. College, Suite 12 Ft. Collins, CO 80525 (970) 226-5334 Fax (970) 282-0311 www.shearengineering.com
PAGE 2
February 14, 2006
Project No. 2136-01-04
Re: Gold Stone Creek Minor Subdivision; Weld County (Pierce); Colorado
Response to July 29, 2005 Change of Zone Comments
❑ Public Works has reviewed the revised cul-de-sac design and deemed it acceptable with
regards projected floodways and drainage.
R Acknowledged. As requested, the lots and County rights-of-way have been relocated
outside projected floodways.
❑ The Joint Access, Utility and Drainage Easement Typical Section (Lots 5 and 6) shown on
Sheet 2 of 2 of the Intermill Land Surveying, Inc drawings and Sheet 9 of 10 on the Shear
Engineering Corporation drawings must be classified as internal roadway right-of-way and
dedicate to the public.
o The internal roadway right-of-way shall be 60 feet in width and dedicated to the public.
o The typical cross-section of interior road shall be two I3 foot gravel lanes shown on the
change of zone plat.
o The HOA covenants shall be responsible for maintenance of this segment of the internal
roadway.
R. We no longer propose the Joint Access, Utility and Drainage Easement due to the
relocation of the lots and County rights-of-way outside projected floodways.
❑ Stop signs and street name sign locations to he shown on the final roadway construction
plans have been included and duly noted with zone change submittal.
R. Acknowledged.
❑ Easements to be shown on the final plat (in accordance with the County standards (Sec.24-7-
60) and / or Utility Board recommendations) have been shown and duly noted with zone
change submittal.
R. Acknowledged.
❑ Intersection sight distance triangles at the development entrance will be required. All
landscaping within the triangles must he less than 3%z feet in height at maturity, and noted on
the final roadway plans.
o Sight triangles should he shown in reference to lanes of on-coming traffic (see
northbound lane of WCR 29). The applicant will he required to follow AASHTO — A
Policy on Geometric Design of Highways and Streets 2004, labeling site triangle
geometry on the roadway plans.
R. Acknowledged. Sight distance triangle is shown on the plans (please refer to Sheet 2).
We used the design speed of 55 (MPH) with a line of sight distance of 1240ft.
❑ The applicant shall submit to Public Works stamped, signed and dated final plat drawings
and roadway / construction & grading plan drawings for review (with the final plan
application) and approval. Construction details to be shown on final plat submittal have
been included and duly noted with zone change submittal package.
R. Acknowledged.
PAGE 3
February 14, 2006
Project No. 2136-01-04
Re: Gold Stone Creek Minor Subdivision; Weld County (Pierce); Colorado
Response to July 29, 2005 Change of Zone Comments
❑ The applicant shall submit Improvements Agreements According to Policy Regarding
Collateral for Improvements with the final plan application. These agreements must be
reviewed by Public Works and shall be approved by the Board of County Commissioners
(BOCC)prior to recording any final plan.
R. Acknowledged.
Drainage:
o The Preliminary Drainage, Erosion Control and Water Quality Report for Gold Stone Creek
Minor Subdivision, dated June 2005, by Brian Shear, P.E. (Colorado PE#20262) with Shear
Engineering Corporation (Project No: 2136-01-04) is satisfactory.
o The report notes a flood zone (Spring Creek drainage) passing through the proposed
development site.
o The report shows calculated drainage and channel cross-sections using HEC-RAS
models.
o The report outlines design alternatives and analysis concluding on a levee system
solution.
R. Acknowledged.
o The applicant shall address building envelope locations (for Lot #4, Lot #5, Lot #7, and Lot
#6) with the final plan application materials. "In no case shall a one-hundred-year design
storm frequency cause inundation to any structure or pose a hazard. " It is the Public Works
recommendation to locate all building structures out of the known flood zone. Any structures
located in close proximity to a flood zone may consider standard flood protection measures,
which may include raising the main floor elevation.
o Proposed building footprint locations have been shown to be compliant; however
minimum building envelope locations should also be included on final plat submittal.
R Acknowledged. We have relocated the proposed lots and County rights-of-way outside
projected floodways.
o The applicant shall amend the required dimensions for the box culvert tinder the interior
gravel roadway.
R We no longer propose the Joint Access (interior gravel roadway) due to the relocation of
the proposed lots outside projected floodways.
o A final drainage report stamped, signed and dated by a professional engineer licensed in the
State of Colorado shall be submitted with the final plan application, since a flood zone is
noted as passing through the proposed site.
R. Acknowledged.
PAGE 4
February 14, 2006
Project No. 2136-01-04
Re: Gold Stone Creek Minor Subdivision; Weld County (Pierce); Colorado
Response to July 29, 2005 Change of Zone Comments
o The final drainage report shall include a flood hazard review documenting any FEMA
defined floodplains or floodways. The engineer shall reference the specific map panel
number, including date. The development site shall be located on the copy of the FEMA
map.
R. Acknowledged. Please reference Appendix III of the Final Drainage, Erosion Control
and Water Quality Report.
o Storm water runoff shall not adversely impact downstream storm drainage facilities.
R. Acknowledged.
o The report must include discussion of the flood zone and the impacts/implications with-
respect-to the proposed development, building structures, roadway, developed
storm water drainage, and HOA covenants/restrictions for a major drainage way.
R. Acknowledged.
❑ The applicant shall prepare a construction detail for typical lot grading with respect to
drainage for the final plan application. Front, rear and side slopes around building
envelopes must be addressed. In addition, drainage for rear and side lot line swales shall be
considered. Building envelopes must he planned to avoid storm water flows, while taking into
account adjacent drainage mitigation.
R Acknowledged. Please reference Typical Lot Grading Detail on Sheet 5, the Final
Grading Plan.
o Final drainage construction and erosion control plans (conforming to the drainage report)
stamped, signed and dated by a professional engineer licensed in the State of Colorado shall
he submitted with each final plan (phase) application. These plans (storm water management
plans) may he based on Urban Drainage methodology.
R Acknowledged.
PAGE 5
February 14, 2006
Project No. 2136-01-04
Re: Gold Stone Creek Minor Subdivision; Weld County (Pierce); Colorado
Response to July 29, 2005 Change of Zone Comments
We trust that this response has addressed all of your specific comments and concerns. If you
have any questions or further comments during your next detailed project review, please call at
(970) 226-5334.
Sincerely,
Brent Balik
Shear Engineering Corporation
attachments
cc: Chris Gathman, Weld County Planning
Walter Huang; Gold Stone Center LLC
Tom Honn; TH Inc.
Steve Stencel, PLS; Intermit! Land Surveying
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