HomeMy WebLinkAboutSUN COMMUNITIES - THE FOOTHILLS - FDP220005 - SUBMITTAL DOCUMENTS - ROUND 4 - VARIANCE REQUEST
143 Union Boulevard, Suite 700, Lakewood, CO 80228 Tel: 303.462.1100 Fax: 303.825.7110
www.atwell-group.com
12/14/2022
City Of Fort Collins
Engineering Department
281 North College Ave.,
Fort Collins, CO 80524
RE: Variance Request for utility minimum cover depth
Larimer County Urban Area Street Standards, Section 12.2.2 - Minimum Depth
The Foothills
Atwell Project Number: 19002763
City of Fort Collins Engineering,
This is a request for a variance from the Larimer County Urban Area Street Standards (LCUASS), Section
12.2.2, for minimum bury depth of utilities. The standard minimum depth for all utilities is stated as being
2 feet below the subgrade elevation. The Foothills is proposing a reduction in minimum cover depth for
the storm pipes in Kevin Drive to 1.4’ below existing grade.
The need for this variance is due to the replacement of the existing storm system in Kevin Drive, which
interferes with the entrance into The Foothills. The sump location in Kevin Drive is also at a different
location than the existing outfall of the storm system, meaning stormwater enters an inlet at the roadway
sump, and then is conveyed by storm pipe to another inlet, where it outfalls at the proposed entrance.
The Foothills is proposing to drain the storm system to the same sump location as it exists in Kevin Drive
and re-route the existing storm system around the The Foothills entrance and other existing utilities.
Elliptical class III pipe has been proposed to get more cover than a round pipe, and at a strength class
that will allow for lesser cover. It is the opinion of the design engineer that the replacement of the existing
storm pipes will not impact the functionality of the storm system as originally designed.
It is the opinion of the design engineer that there will be no adverse impacts to the City’s capital and
maintenance costs associated with this variance and will not be detrimental to the City.
Respectfully,
ATWELL, LLC
Justin Phipps, PE
Project Coordinator
Attachements: Sheet 79 of the Utility Plans, showing the Kevin Drive Storm sewer replacement.
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Know what's below.
before you dig.Call
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DEBRA DRIVECOLLEGE AVENUEPITNER DRIVE KEVIN DRIVERICK DRIVE
TRILBY ROAD PORTNER DRIVECROW
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PLANS UNDER
REVIEW
NOT FOR
CONSTRUCTION
STORM RUN 10STORM RUN 9