Floodplain maps provide the basis for floodplain management, regulation, and insurance requirements by identifying flood-prone areas that may threaten life and property. Floodplain maps are reviewed and approved by FEMA. Once approved, the floodplain maps guide flood management programs, including floodplain regulation, safety, preservation, preparation and mitigation.
Re-Evaluation of Flood Hazards
FEMA completed a re-evaluation of the flood hazards in our community and has provided new Flood Insurance Rate Maps (FIRM’s) and Flood Insurance Study (FIS) report which are effective March 22nd, 2023. The new floodplain mapping is based on updated topographic, and in some cases, revised hydrologic and hydraulic analysis.
If you'd like assistance on floodplain information, please complete the Floodplain Information Request Form (PDF) and either fax it to 605-642-1337 or drop it off in-person at the Building & Development Office at 625 N. 5th Street, 2nd Floor.
Floodplain Map Changes
Floodplain maps are periodically updated and revised to reflect changing conditions, such as impacts of flooding, new topography, land development, updated mapping studies, and construction of floodplain improvements.