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Resident questions dam revisions and warranty as engineers plan weir extension; city outlines timeline
Summary
A resident asked whether dam work is limited to extending the weir wall or includes raising it; city engineers said the weir controls upstream flow and raising it should limit silt passage. City Manager Gordon Hargrove confirmed a warranty exists ("at least twelve months") and staff described a completion target prior to storm season with permanent work finished before storm season and a public projected completion of November 2026.
Steve Stegman, who lives at 194 N. Shore Drive, asked the Board whether the planned dam revisions amount to only an extension of the weir wall or a larger change such as raising the weir five feet. He also raised concerns about silt and whether the outlet pipe or the weir controls upstream water levels.
"Because the outflow is determined by the lake bed," Stegman said, he was concerned that silt could backwash into the pipe and fill it. Jim Stachura, the city's stormwater engineer, explained the weir controls upstream levels: "when controlled by the weir wall, the outlet pipe does not control anything upstream; the weir controls it." Stachura added that by the time water reaches the weir, sediment typically has settled in the lake bed and "minimal silt passes over the weir wall." He noted that silt would be an issue if the drain at the bottom of the dam is opened.
Stegman also asked whether the dam work carries a warranty and how long it would last. City Manager Gordon Hargrove told the board a warranty exists and he would check the exact term; he said he knows it is "at least twelve months." Stegman suggested a minimum three-year warranty, but the board did not adopt a change to warranty terms during the meeting.
Separately, members of the public asked about the project's timeline. Commissioner Kim Sherwood said the publicly available punch list outlines start dates and projected completion by November 2026, but that the contract extends into 2027 because an additional ten months were granted due to PTC8. City Manager Hargrove said the plan is to complete demolition, water control and preparatory work so concrete crews can move between dam sites and to finish permanent concrete work before storm season; he cautioned that weather and emergencies could alter the schedule.
The board heard related questions about lake-level fluctuations and vegetation management during the public-comment period; staff described methods (pontoon or tracked equipment) to remove overgrown plants if the water returns and mowing becomes impossible.
No formal action altering the dam contract, warranty or schedule was taken at the meeting.
