Flood Zones: De Pere vs Green Bay

The City of De Pere participates in the National Flood Insurance Program (NFIP) and regulates floodplain development in conformance with Wis. Stat. Sec. 87.30 and Wisconsin Administrative Code Chapter NR 116, plus 44 CFR Parts 59-72. The Fox River is the principal regulated waterway through the city. The currently effective FEMA Flood Insurance Rate Maps (FIRMs) for Brown County, which include De Pere, were adopted by the Brown County Board of Supervisors on February 15, 2023 and became effective on May 9, 2023. Development in mapped Special Flood Hazard Areas requires zoning approval, and new residential structures in the regulatory floodway are prohibited under NR 116.

The City of Green Bay participates in the National Flood Insurance Program and regulates floodplain development through Article XIII (Floodplain Overlay District) of its zoning code, adopted under Wis. Stat. Sec. 87.30 and the minimum standards of Wis. Admin. Code Chapter NR 116. Primary flood sources are the Bay of Green Bay, the Fox River, the East River, and Mahon Creek. FEMA issued updated Flood Insurance Rate Maps for Brown County that became effective May 9, 2023, and these are the maps now used to delineate Special Flood Hazard Areas. New residential structures are prohibited in the regulatory floodway, and floodplain development requires zoning approval before any building permit is issued.