FEMA flood zone rules in Memphis, TN β also called floodplain regulations or special flood hazard area (SFHA) rules β determine flood insurance requirements and elevation standards for new construction.
Memphis has extensive FEMA-designated flood zones along the Mississippi River, Wolf River, Nonconnah Creek, and Loosahatchie River. The Unified Development Code (UDC) and Memphis City Ordinance No. 4538 regulate construction in Special Flood Hazard Areas (SFHAs). New construction in the 100-year floodplain must elevate the lowest floor at least one foot above base flood elevation. The Shelby County Zoning Atlas identifies flood zones for all parcels.
Shelby County participates in NFIP and publishes FEMA FIRMs for the Memphis area. The Mississippi River at Memphis can flood over days/weeks; the Wolf River and Loosahatchie River can flash flood with little warning. Floodplain development in SFHA requires a permit from Shelby County. Tennessee Flood Damage Prevention Act governs; TDEC administers. The 2010 Nashville flood highlighted statewide flood vulnerabilities. Memphis area flood maps available through Shelby County: shelbycountytn.gov.
Construction below flood elevation: retroactive compliance required, fines $500 to $5,000. Floodway encroachment: removal order. Failure to maintain flood insurance: lender force-placement at higher cost.
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