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Commission backs MSA design to lower Confluence Pond weir; recommends finance review of $36,000 agreement
Summary
The Middleton commission recommended MSA for engineering design to lower the Confluence Pond v‑notch weir and voted to forward a not‑to‑exceed $36,000 design agreement to finance and counsel.
The Water Resources Commission recommended that the city move forward with engineering design to lower the v‑notch weir at Confluence Pond and asked finance and counsel to approve an agreement with MSA not to exceed $36,000.
Staff member (S3) explained that lowering the bottom of the v‑notch (not the weir top) would increase active storage and reduce peak flows at the pond during storm events. Two firms — EOR and MSA — submitted proposals; staff said the proposals were similar in scope but MSA’s cost was substantially lower.
"The two submittals were pretty similar in scope and schedule. It was really just the cost," the staff member said. The commission moved to recommend that finance and counsel accept the MSA proposal not to exceed $36,000 for engineering services to design the weir modification.
The motion carried on a recorded voice vote later in the meeting (6–0 recorded), according to the transcript. The approved recommendation is for engineering design only; any physical modification of the structure would require further authorization and procurement.
Members noted that the design phase should include an analysis of downstream performance and potential sediment/phosphorus tradeoffs, and that if the design analysis showed unacceptable tradeoffs the commission could withhold support for construction.
