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City authorizes WBIF-funded stormwater studies and Diamond Lake chemistry work; city share about one-third
Summary
Council authorized four stormwater efforts tied to Elm Creek Watershed funding — a French Lake feasibility study, SAFL-baffle installations, a Grama Lake study and a Diamond Lake treatment feasibility effort — with staff saying roughly 33% of the $200,000 package will be the city's responsibility.
City staff recommended and the council approved a package of stormwater projects that align with Elm Creek Watershed’s Watershed Based Implementation Funding (WBIF) program, including studies and treatment steps aimed at French Lake, Grama Lake and Diamond Lake.
The consultant presentation outlined four pieces: a French Lake feasibility/design study (~$15,000), three SAFL-baffle catch-basin retrofit structures (initially two but a third was identified), a 100%-grant-funded Grama Lake water-quality study, and a Diamond Lake treatment feasibility/chemistry study (followed by an alum-dosing option if warranted). Staff said some project components are funded 100% by grant and others require a partial city contribution; "it's about 33% city responsibility for the $200,000 improvements," staff said.
Why it matters: Diamond Lake and the connected Diamond Creek are important local water resources; the work is intended to reduce phosphorus and algae and to identify cost-effective treatment approaches. The Grama Lake chemistry study will inform how much alum or other measures might be needed and whether dredging or other expensive remedies are appropriate.
Council discussion focused on timing with nearby development, the need to coordinate with adjacent jurisdictions and the potential for grant matches; members asked staff to coordinate with developers and the watershed. The motion to approve the projects passed 4–0.
What’s next: staff will proceed to contract for design and studies and return with any cost refinements and coordination plans; projects that require city match will be brought forward with funding source details.
