Water Quality | Draft Environmental Assessment for Flathead Lake Club Subdivision Project – Phase 1 | Public Hearing June 4, 2026 | Comment Period Ends June 15, 2026
The Proposed Action is for the Montana DEQ to issue a Certificate of Subdivision Approval (COSA) and associated public water supply, wastewater, and stormwater plan approvals for Phase 1 of the Flathead Lake Club Subdivision in Flathead County. Phase 1 consists of 80 residential lots, associated open space, roads, and utility corridors located on located on a tract of land located in Sections 29 and 30, T26N, R20W, P.M.M., Flathead County, Montana, with DEQ’s decision and environmental review limited to sanitary facilities rather than the subdivision itself, which received separate preliminary plat approval from Flathead County. The sanitary facilities include: (1) a public water supply system consisting of three public water supply wells (two existing wells, GWIC 237308 and 237309, and one new well PWS‑3), a pump station, water storage tank, and associated transmission and distribution mains designed in accordance with Circular DEQ‑1 to provide both domestic supply and required fire flows via hydrants; (2) The wastewater collection system will generally consist of gravity sewer mains, manholes, gravity service connections, and two low-pressure force mains serving individual grinder pump service connections that conveys flows via an off‑site connection (EQ 26‑1187) to the existing LCWSD wastewater treatment facility for treatment and disposal under the District’s existing permits; and (3) an on‑site stormwater system consisting of roadside swales, culverts, natural drainage pathways, and detention/retention basins designed to Circular DEQ‑8 to maintain post‑development discharge rates at or below pre‑development conditions and maintained by Territory 1889 Association, LLC. As a condition of approval, the public water supply system would be transferred to the Lakeside County Water and Sewer District (LCWSD) for ownership and long-term operation.
Associated Materials:
- Draft Environmental Assessment – Flathead Lake Club Subdivision Project – Phase 1
- Lot Layout (Figure 2) – Flathead Lake Club Subdivision Project – Phase 1
- Storm Water General Layout (Figure 3) – Flathead Lake Club Subdivision Project – Phase 1
- Wildlife Assessment - Flathead Lake Club Subdivision Project – Phase 1
- Preliminary Plat Conditional Approval - Flathead Lake Club Subdivision Project – Phase 1
Public Comment Period Ends: Comments must be received or postmarked by 11:59 p.m. June 15, 2026
Send/Submit Comments to:
DEQ
Engineering Bureau
P.O. Box 200901
Helena, MT 59620-0901
Or electronically to: DEQEngProgramMEPA@mt.gov
Public Hearing:
DEQ will hold a public hearing for the Flathead Lake Club Subdivision Project – Phase 1 Thursday, June 4, 2026, at 5:00 – 7:00 p.m. virtually via Zoom. See the Zoom meeting information below.
Via Zoom:
Please click the link below to join the webinar:
https://mt-gov.zoom.us/j/86936604230?pwd=RQJhUSLisuikHhIGZk2ASYOTseRcOU.1
Join via audio:
Webinar ID: 869 3660 4230
Passcode: 056803
Or Telephone: +1 206 337 9723 US (Seattle)
Tags: MEPA, Public Comment, Water and Public Meeting