New Floodplain Maps for Rock Creek and the Clark Fork and Bitterroot Rivers

Missoula County Commissioners · October 21, 2025

Missoula County commissioners hosted a discussion with County Planner and Floodplain Administrator Matt Heimel about newly published preliminary FEMA floodplain maps for the Clark Fork, Bitterroot and Rock Creek. Heimel explained how the maps interact with the National Flood Insurance Program (NFIP), what the maps mean for homeowners and lenders, the county's limited role in appeals, and the next procedural steps including a consultation/coordination (CCO) meeting and a FEMA comment and 90-day appeal period. He also described a technical change affecting the Orchard Homes levee area where some landward areas previously shown as floodway are now classified as flood fringe under updated FEMA guidance.

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