FEMA flood zone rules in Cheyenne, WY — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Cheyenne participates in the National Flood Insurance Program. Crow Creek and Dry Creek floodplains carry Special Flood Hazard Area designations, and substantial improvements within them must meet elevation standards.
FEMA mapped flood hazard areas along Crow Creek, Dry Creek, and several tributaries through Cheyenne. Properties in Special Flood Hazard Areas (Zone A, AE) are subject to floodplain development permit review by the city, lender-required flood insurance for federally backed mortgages, and elevation or floodproofing standards for new construction or substantial improvements (improvements valued at 50 percent or more of the structure). The city has worked with FEMA on map updates and maintains GIS layers showing the current effective Flood Insurance Rate Map for Laramie County and Cheyenne.
Building in the floodplain without a permit, failing to elevate to base flood elevation, or filling regulatory floodway areas can trigger removal orders, fines, and loss of NFIP eligibility for the structure.
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See how Cheyenne's flood zones rules stack up against other locations.
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