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Board approves $38,000 amendment for Sand Lake/US‑53 regional pond hydrology analysis; DNR concurrence required
Summary
The board approved a $38,000 amendment to refine the hydrology analysis for the Sand Lake Road/US‑53 regional pond (Menards Pond). The work—paid from TID 6—responds to Wisconsin DNR requests for additional modeling to evaluate pre‑development floodplain and conveyance impacts so nearby parcels can be developed.
Onalaska officials voted unanimously May 6 to approve Amendment No. 1 to the Sand Lake Road/US‑53 regional pond hydrology analysis, allocating $38,000 from Tax Incremental District 6 to the consultant to produce additional modeling and provide materials the Wisconsin Department of Natural Resources requires for concurrence.
Jared Holter described the work as a hydraulic analysis (not the design) of the drainage area that would move stormwater toward the Menards Ponding Area. The DNR asked the city to resubmit the watershed model in a format different than FEMA’s and to run additional historical (pre‑fill) existing‑conditions modeling and floodplain impact analysis, including effects from Stanley Coulee Creek and a culvert removed in 1999.
Holter said the analysis is substantial and that without DNR concurrence about floodplain mapping and conveyance, roughly 10 acres currently mapped FEMA floodplain would remain undevelopable; completing the work would make about 20 acres of land available for development including sites planned inside the TID. He said that TID revenues will fund the analysis and later conveyance and stormwater work once DNR concurrence and design are complete.
Mayor Kim moved to approve the amendment with payment from TID 6; the motion was seconded and carried unanimously. The board heard questions about which parcels are affected and how developer TID funding will support the work; staff confirmed the city bought adjoining property years earlier to support this long‑range plan.
