FEMA flood map notices

Flood map changes in Davison County, South Dakota

FEMA has published 2 flood hazard notices covering Davison County, South Dakota since November 2023. The most recent, final flood hazard determinations, was published Jan 16, 2025.

Notices for Davison County

Jan 16, 2025FinalFinal Flood Hazard DeterminationsAlso covers 3 other counties
Jan 5, 2024ProposedProposed Flood Hazard DeterminationsAppeal period closed Apr 4, 2024

Also covered by these notices

FEMA often studies whole watersheds, so one notice can span several counties.

What these notices mean

Proposed: FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
Final: Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
Map revision: A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.

Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean