*UPDATE Gallatin County and Three Forks*
Preliminary Flood Insurance Rate Maps will be issued by FEMA for the Jefferson and Madison Rivers on August 12, 2025.
Preliminary maps can be viewed here or on the viewer below. Preliminary maps and the flood insurance study will also be available at the county and city offices.
Gallatin County and the City of Three Forks have been working with the Federal Emergency Management Agency (FEMA) and Montana Department of Natural Resources and Conservation (DNRC) since 2018 to produce new floodplain maps for portions of the Madison and Jefferson Rivers.
Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually result in updated FEMA floodplain maps.
*please be patient while the data loads on the viewer*
Flood Insurance Information:
Update flood zone fact sheets are coming
For additional questions contact your local floodplain administrator.
Gallatin County
Sean O'Callaghan
sean.ocallaghan@gallatin.mt.gov
(406) 582-2280
City of Three Forks
Kelly Smith
ksmith@threeforksmontana.us
(406) 285-3431
Tentative Project Timeline
