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Mukwonago reports dam rise, culvert damage and 2.8 million‑gallon wastewater peak after April storms
Summary
Police, public works and utilities staff described coordinated emergency response to heavy rains: dam elevations peaked near 10 inches (below the 11‑inch spillway), a culvert near village hall was damaged and will need emergency repair, and wastewater flows peaked at about 2,800,000 gallons per day but were managed without violation.
Village staff and first responders briefed trustees on April storm impacts and the local response. Police and dispatch activated emergency plans, deployed a drone for damage assessment and monitored the dam, which rose to about 10 inches and did not reach the 11‑inch spillway threshold.
Public works director Ron Bittner reported localized flooding from full catch basins and said crews cleared debris and that one culvert near village hall was damaged; staff will return to the board with an emergency repair order after assessing the needed work.
Utilities staff described heavy inflow and infiltration at the wastewater plant: average flow is about 800,000 gallons per day, and plant flow peaked at roughly 2,800,000 gallons per day during the storm. The crew deployed a portable trailer pump, fueled it regularly and managed the plant’s flow without generating permit‑level violations.
Staff also displayed sections of an old cast‑iron water main uncovered during excavation on Highway 83, estimating the pipe dated from roughly 1910–1940 and noting it will be replaced as part of the Highway 83 project. Trustees thanked staff and mutual aid partners for coordinated response and noted continued monitoring of road and traffic impacts from regional projects.
