PROJECT UPDATE GRANITE COUNTY RESIDENTS
Granite County and the Town of Drummond Flood Insurance Rate Maps will go effective on August 19, 2025. Please contact the local floodplain administrators to learn more.
Project Update Missoula County
Preliminary Flood Insurance Rate Maps and the Preliminary Flood Insurance Study will be issued by FEMA on August 28, 2025. Preliminary maps can be viewed here on FEMA's Map Service Center, on the DNRC flood hazard viewer below, or hard copies will be available at County and City offices.
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.
Draft Data:
Click on the link below to see the proposed floodplain maps and how they compare to the existing FEMA maps. Keep in mind these maps are in draft format.
Public Open House Meetings for Missoula County and the City of Missoula:
- Oct 18, 2022 | Commercial Building at the Missoula Fairgrounds | view slides | view video recording
- Oct 19, 2022 | Lolo School Lower Gym Lolo | view slides | view video recording
- Oct 20, 2022 | Missoula County Courthouse Sophie Moiese Room | view slides | view video recording
Project kickoff meetings
- October 23, 2019 with Missoula County and the City of Missoula. | view slides
Flood Study data and reports are available upon request at county and city offices.
Give comments during the official Appeal and Comment Period:
During this project you will have the opportunity to submit an official comment or appeal about the proposed floodplain changes to FEMA. Check back to stay informed on the specific dates of the Appeal and Comment Period.
Missoula County mid 2026 estimated.
Community fact sheets
Update fact sheets are in progress.
For more information contact your local Floodplain Administrator.
Missoula County
Matt Heimel
mheimel@missoulacounty.us
(406) 258-3799
City of Missoula
Cassie Tripard
TripardC@ci.missoula.mt.us
(406) 552-6673
Project Timeline
Below is the tentative project timeline.
Map History & Project information
In Missoula County, floodplain maps were modernized through a Digitized Flood Insurance Rate Map (DFIRM) project initiated in 2005 and completed in 2015. Granite County was modernized to digital format with a 2016 RiskMAP project. The maps were converted from paper to digital. None of the proposed stream reaches were restudied during DFIRM conversion, and as a result, most of the effective mapping is almost 40 years old.
Below are the study extents and level of study for the Clark Fork and Bitterroot River and Rock Creek.
