Digital Flood Insurance Rate Maps

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The Federal Emergency Management Agency (FEMA) adopted new Flood Insurance Rate Maps (FIRMs) for Missoula County on March 7, 2019. You can obtain the most recent floodplain maps in one of the following ways:

  • View online here by clicking FEMA Digital Flood Insurance Rate Maps (DFIRM).
  • Request a DVD at the Community and Planning Services Office ($1).
  • Have the maps downloaded onto your flash drive at the Community and Planning Services Office (Free).
  • View and print maps from FEMA's map center.
  • FEMA's Revalidation Letter lists Letter of Map Change (LOMC) issued under older floodplain maps and reaffirmed for the July 6, 2015 DFIRM. The Revalidation Letter does not list LOMCs that have been incorporated, superseded by new or revised mapping or no longer valid. The Revalidation Letter is considered legally binding, in the same manner as an original LOMR-F or LOMA, provided that a copy of the original determination accompanies the Revalidation Letter.
  • FEMA has revalidated the previous Letter of Map Revision (LOMR) which amended the floodplain maps for the Blackfoot and Clark Fork Rivers following the removal of Milltown and Stimson Dams effective July 29, 2015. For additional information please contact the floodplain administrator or review the LOMR here and here.

Flood Insurance Study

The Flood Insurance Study (FIS) is a narrative report of Missoula County's flood hazards. Flood profiles within the FIS may be used to obtain the detailed base flood elevation at a specific site and also the predicted elevation for other flood events. Information contained in the FIS includes:

  • Description of the areas studies and the engineering methods used
  • Past flooding information
  • Graphic profiles of the flood source
  • Other pertinent information

Download the Flood Insurance Study

FEMA's original 2019 Digital Flood Insurance Rate Map (DFIRM) GIS data may be downloaded here - search for Missoula: