R2025-287 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for Waterway Improvements with James S. Dunn and Jonathan C. Dunn

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Council Memo Public Works Department No. 2025-97 DATE: 10/20/2025 TO: Honorable Mayor Julie Moore Wolfe and City Council Members FROM: Tim Gleason,City Manager Matt Newell,Director of Public Works Robert Weil,Water Production Manager Jennifer Gunter,Watershed& Lake Manager SUBJECT: Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for Waterway Improvements with James S. Dunn and Jonathan C.Dunn SUMMARY RECOMMENDATION: It is recommended that the City Council approve the attached resolution authorizing a Lake Decatur Watershed Farmland Conservation Program Agreement between the City of Decatur and James S. Dunn and Jonathan C. Dunn for the construction of a waterway to control nutrients, sediment and erosion for a not to exceed cost to the City of$26,622.00. This amount represents 90% of the total project cost of$29,580.00 with a 20% contingency. The remainder of$2,958.00 will be paid by the property owner. BACKGROUND: The City's 2021 Watershed Management Plan is designed to significantly reduce Lake Decatur sedimentation and improve the lake's water quality through watershed conservation. City staff manages the watershed conservation efforts in-house with the assistance of Northwater Consulting,the City's Watershed Management Plan consultant. The waterway is to be constructed on private land and is expected to result in these reductions over the 10-year life of the project: Nitrogen 2,630 pounds Phosphorus 60 pounds Sediment 40 tons SCHEDULE: Work on this project is expected to start in October 2025 and will be completed by November 2025 depending on weather conditions. LEGAL REVIEW: The Legal Department has approved the standard agreement template. PRIOR COUNCIL ACTION: September 25,2023 —Study session in which the Mayor and City Council received a briefing on the watershed protection program.