Missoula and Granite Counties are working with MT DNRC and FEMA to update and produce new Flood Insurance Rate Maps (FIRMS) for the Clark Fork River, Bitterroot River, Rock Creek, and Rock Creek Tributaries. Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually replace the existing floodplain maps which are based on data from the 1970s. 

The floodplain administration program includes permitting and regulatory work associated with the floodplain in Missoula County outside Missoula City limits*.

Floodplain management is the operation of a community program of preventive and corrective measures to reduce the risk of current and future flooding, resulting in a more resilient community. These measures take a variety of forms, are carried out by multiple stakeholders with a vested interest in responsible floodplain management, and generally include requirements for zoning, subdivision or building, building codes and special-purpose floodplain ordinances.

State and federal agencies, local communities and property owners have a role in reducing flood risk and helping communities become more resilient. From states providing strong model ordinances, to communities adopting and enforcing higher-standard building practices, to property owners elevating their homes, everyone can play a part in making communities safer and more resistant to flood disasters. 

Online Floodplain Tool  

Floodplain status of County parcels per the FEMA floodplain maps can be checked online. By entering the parcel's address or geocode number, you can view the approximate boundaries of the March 7, 2019 FEMA maps including the July 29, 2015 Milltown LOMR:  

(This tool requires usage of the Chrome internet browser available free here: