In a recent government meeting, officials discussed the ongoing challenges and solutions related to the city's storm sewer system, particularly its interaction with local water bodies. Approximately 90% of the city's storm sewers discharge into water bodies that are typically below normal water levels, leading to significant water backup issues. This situation is exacerbated by the city's low-lying geography and proximity to Lake Winnebago and the Fox River, which are regulated by the Army Corps of Engineers.

As part of the city's infrastructure improvements, officials highlighted the installation of a large 6-foot by 12-foot box culvert, which occupies a substantial portion of the right-of-way. The Army Corps is currently managing a seasonal drawdown of water levels in Lake Winnebago, a process that is crucial for maintaining safe ice conditions during winter.

To mitigate groundwater issues, the city has implemented advanced design and construction techniques for storm sewers, including the use of mastic materials for sealing and bentonite dams to prevent groundwater from infiltrating utility trenches. These measures are informed by past experiences with similar projects, where groundwater intrusion caused problems for residents.

Additionally, the city is replacing old, leaky sanitary sewers to comply with state and federal regulations aimed at reducing clear water infiltration into the sanitary system. This replacement is part of a broader capital improvement program that has been in place for the last 15 years.

The contractor for the project has also installed groundwater dewatering wells to manage groundwater levels during construction, indicating the area's high groundwater presence. City officials are actively seeking a hydrogeologist to further investigate groundwater conditions, as they face challenges in finding qualified professionals for localized assessments.

Overall, the meeting underscored the city's commitment to addressing stormwater management and groundwater issues through innovative engineering solutions and regulatory compliance.