Missoula County demonstrates interactive floodplain map viewer with preliminary FEMA layers

Oct 21, 2025

Missoula County Floodplain Administrator Matt Heimel demonstrated an online Floodplain Map Viewer that overlays preliminary FEMA flood mapping for the Clark Fork, Bitterroot and Rock Creek watersheds onto the county GIS, and detailed how property owners, realtors and engineers can use the tool and contact county staff for help.

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In a recorded presentation, Missoula County Floodplain Administrator Matt Heimel demonstrated the county's Floodplain Map Viewer, an online tool that integrates Federal Emergency Management Agency (FEMA) preliminary floodplain data with Missoula County GIS layers to show how mapped flood hazards intersect specific parcels.

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