HomeMy WebLinkAboutST3 - Stormwater Pond Departure Request
714 Stoneridge Drive, Suite 2 Bozeman, MT 59718
Page 1
March 3, 2025
City of Bozeman
Department of Community Development
ATTN: Cody Flammond, PE
20 East Olive Street
Bozeman, MT 59715
Re: Valley Glass and Windows Storage/Treatment Standards Departure
(Planning File Number:24-511)
Dear Cody Flammond,
The intent of this letter is to request a departure from the Bozeman Design Standards and
Specifications Policy (March 2004 with Addendums), Section II.C.4. for retention basin design. The
departure request is in reference to the Valley Glass and Windows Site Plan – PN #24-511, a planning
department site plan application to add a proposed to 11,800 Square Foot building to an existing
commercially developed lot. The lot is legally described as Lot 3 of Tract 6 Plus Vacated Single Tree
Court, Gardner Simmental Plaza Subdivision, Section 35, Township 1 South, Range 5 East of P.M.M. The
lot is located within the City of Bozeman and will be serviced by the city with water and sewer services,
as well as the City road network.
The design standards require that detention and retention basins be designed with 4:1 side
slopes or flatter. Drainage Basin #5, that includes the existing parking lot, is proposed to flow towards
existing stormwater retention facilities located north of the parking area, along the property line. With
the proposed site development, this stormwater retention area will be enhanced to meet the retention
requirements of the City of Bozeman DSSP. The facility will add 3 drywells with PVC laterals. Above the
drywells, a retention pond will installed. To provide adequate volume and prevent the stormwater
facility from being in the lot front utility easement, the pond will require 3:1 side slopes.
Please feel free to contact Alpine Surveying and Engineering with any questions at (406) 586-5599, or by
email at ecote@alpinesurveying.net and dkirsch@alpinesurveying.net.
Sincerely,
Drew Kirsch, PE
Alpine Surveying and Engineering, Inc.