Flood Zones: Ashwaubenon vs Green Bay

The Village of Ashwaubenon Floodplain Zoning Ordinance is Chapter 14 of the Municipal Code, adopted under Wis. Stat. Sec. 61.35, Sec. 62.23, and Sec. 87.30, in conformance with Wis. Admin. Code Ch. NR 116 and 44 CFR 59-72. Sec. 14-1-7 establishes the Floodway District (FW), Floodfringe District (FF), and General Floodplain District (GFP) corresponding to A, AE, AH, and AO zones on the FEMA FIRM. Official maps cited in Sec. 14-1-6(B)(1) include Brown County FIRM panels 55009C0168G, 0254G, 0256G, and 0258G dated May 9, 2023, plus panels 55009C0144G, 0163F, 0164F, 0234F, 0251F, 0252F, and 0253F dated August 18, 2009, with the Brown County Flood Insurance Study (FIS) volumes 55009CV001C-CV004C dated May 9, 2023. Sec. 14-1-5 sets the Flood Protection Elevation at 2 feet of freeboard above the Regional Flood Elevation. Floodplain permits are administered by the Community Development Department.

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.