HomeMy WebLinkAboutVariance Requests - 11/25/2024 Stormwater
Alternative Compl ianceNariance Application
City of Fort Collins Water Utilities Engineering
Engineer/OwnerSection A:
Engineer Name Joseph M. Frank Phone 303.267.6232
Street Address 2900 South College Avenue, Ste. 1A
City Fort Collins state CO Zip 80525
Owner Name Michael GOrnik Phone 808.443.9956
Street Address PO Box 2455
City Fort Collins state CO Zip 80521
Section B: Proposed Project Information
Project Name Polestar Village
Project/Application Number from Development Review (i.e. FDP123456) PDP220010
Legal description and/or address of property POLESTAR VILLAGE FILING NO. 1 A PARCEL OF LAND BEING A PORTION
OF THE NORTHWEST QUARTER OF SECTION 16,TOWNSHIP 7 NORTH,RANGE 69 WEST OF THE 6TH PRINCIPAL MERIDIAN,CITY OF FORT COLLINS,COUNTY OF LARIMER,STATE OF COLORADO
Description of Project Mixed use residential and commercial
Existing Use (check one): (` residential r' non-residential C mixed-use (*-' vacant ground
Proposed Use (check one): C" residential C non-residential C: mixed-use C other
If non-residential or mixed use, describe in detail Mixed used Multi-family, residential and commercial
development
Section C: Alternative ComplianceNariance Information
State the requirement from which alternative compliance/variance is sought. (Please include
applicable Drainage Criteria Manual volume, chapter and section.)
Chapter 1, Section 2.2 — Drainage Planning, sub-section - 2.2.1 Planning Process Elements
What hardship prevents this site from meeting the requirement?
See attached letter.
Attach separate sheet if necessary
What alternative is proposed for the site?
See attached letter.
Attach separate sheet if necessary
page 2
The owner agrees to comply with the provisions of the zoning ordinance, building code and all other
applicable sections of the City Code, Land Use Code, City Plan and all other laws and ordinances
affecting the construction and occupancy of the proposed building that are not directly approved by
this variance. The owner understands that if this variance is approved, the structure and its occupants
may be more susceptible to flood or runoff damage as well as other adverse drainage issues.
Signature of owner. Date:
The engineer hereby certifies that the above information, along with the reference plans and project
descriptions is correct.
Signature of engineer: 4. Date:
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Date complete application submitted:
Date of approval/denial: Variance: ❑ approved ❑ denied
Staff justification/notes/conditions
Approved by:
Entered in UtilityFile Database? ❑yes ❑no
It YOU - questions or OLIt forms, • Fort Collins Utilities at:
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VARIANCE REQUEST
Date: November 271h 2024
From: Joseph Frank, PE
Subject: Polestar Phasing Variance Request
I am writing to request a variance from the 2018 Stormwater City of Fort Collins criteria regarding the
phasing requirements as they relate to Water Quality and LID Design.
Chapter 1, Section 2.2—Drainage Planning, Section-2.2.1 Planning Process Elements
For large-scale,multi-phase developments,planners and engineers should incorporate space for water quality
treatments in the initial, overall design plans and plan ahead for addressing the water quality requirements,
whether meeting all the requirements in the first phase or each phase meeting the requirements individually.
What hardship prevents this site from meeting the requirement?
Per the criteria stated above all water quality requirements need to be met in the first phase or in each
sequential phase.
Once the Polestar Village Development is completed more than 75% of the proposed impervious areas will
be treated via LID before being released to the Polestar Detention Pond. However, the requirement to treat
75% of proposed impervious area via LID within each phase is not being met until phase V is complete.
The primary reason for this requirement not being met is that the improvements associated with phase I are
burdened with conveying 10.2 acres of untreated stormwater runoff from the existing Locust Grove
Subdivision north of the site in to the Polestar Detention Pond. Any LID's located along the flow path of the
offsite runoff would need to be sized to treat the entirety of the existing offsite impervious area runoff. This
is not a realistic option which is why the variance is being requested.
What alternative is proposed for the site?
In leu of treating 75% of the phase I impervious area via LID, we are proposing to treat 100% of the 10.2
acre offsite tributary area for water quality within the polestar detention pond water quality capture volume
(WQCV). The WQCV has been increased to account for the offsite area as well as the onsite areas not treated
by LID. Additionally, the WQCV has been combined with the 100 year detention volume rather than added
to it. See Final Drainage Report and Floodplain Modeling Report for Polestar Village for additional
information.
❑ 7200 South Alton Way ❑ 25188 Genesee Trail Road ❑ 5475 Tech Center Drive ❑ 2900 South College Avenue
Suite C400 Suite 110 Suite 235 Suite 1A
Centennial,CO 80112 Golden,CO 80401 Colorado Springs,CO 80919 Fort Collins,CO 80525
303-740-9393 9 Fax 303-921-7320 303-740-9393 9 Fax 303-921-7320 719-593-2593 9 Fax 303-921-7320 970-491-9888 9 Fax 303-921-7320