FEMA flood zone rules in Appleton, WI — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
The City of Appleton participates in the National Flood Insurance Program (NFIP) and regulates floodplain development through its Title 23 Zoning Ordinance, in conformance with Wis. Stat. Sec. 87.30 and Wisconsin Administrative Code Chapter NR 116, plus 44 CFR 59-72. The Fox River is the primary flood source through the city. Effective FEMA Digital Flood Insurance Rate Maps (DFIRMs) for Outagamie County, including Appleton panels, were issued July 22, 2010, derived in part from the Fox River HEC-RAS 2008 Appleton Leverage Study. Development in mapped Special Flood Hazard Areas requires zoning approval, and structures in the regulatory floodway are prohibited or strictly limited.
Wisconsin requires every municipality with mapped floodplain or that participates in the NFIP to adopt a floodplain zoning ordinance meeting the minimum standards of Chapter NR 116 (Wis. Admin. Code) and 44 CFR Parts 59-72, under the authority of Wis. Stat. Sec. 87.30. The City of Appleton, located in Outagamie, Calumet, and Winnebago Counties, administers floodplain zoning within its corporate limits as part of Title 23. The Fox River is the principal regulated waterway through the city. The currently effective Digital Flood Insurance Rate Map for Outagamie County (which contains most of Appleton) became effective July 22, 2010, with hydraulic data updated using the Fox River HEC-RAS 2008 Appleton Leverage Study (FEMA Case 07-05-4870S). Under NR 116 standards, the regulatory floodway prohibits new residential structures and most fill, while the flood fringe allows development if the lowest floor of any habitable space is elevated to or above the flood protection elevation (regional flood elevation plus a freeboard, typically 2 feet under NR 116.13). Floodplain permits are issued by the Wisconsin DNR-approved local zoning administrator before any building permit may be issued. The Wisconsin DNR Floodplain Mapping Program, together with FEMA's Map Service Center (msc.fema.gov) and National Flood Hazard Layer, provides the authoritative maps.
Wis. Stat. Sec. 87.30(2) and NR 116.21 require enforcement of local floodplain zoning. Violations - including filling, structural development, or occupancy of habitable space in the floodway, or building below the flood protection elevation in the flood fringe - can result in citation, daily forfeitures, removal/restoration orders, and loss of NFIP eligibility for the property. Misrepresenting elevation data on a permit application is independently actionable. Failure of a community to enforce can lead to suspension from the NFIP under 44 CFR Part 59.
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