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    • Big Horn, Treasure, and Rosebud Counties have been working with the Federal Emergency Management Agency (FEMA) and Montana Department of Natural Resources and Conservation (DNRC) to produce new and updated 1% annual chance (100-year) floodplain maps. The project includes updating all the existing mapped floodplains, and producing new maps for portions of Rosebud County. 

    Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually result in updated FEMA floodplain maps. Most of the existing FEMA floodplain maps are based on data from the 1970s and 1980s. For more information see: Floodplain FAQs Flood Study Process. 


    Project Timeline

    Flood Insurance Rate Maps indicate areas of flood risk. Once this project is complete, new and updated Flood Insurance Rate Maps will provide more accurate, current, and detailed data and mapping of flood risk areas. New floodplain studies involve collecting and analyzing data including: topography, hydrology analyses and hydraulic analysis. 

    approved update project timeline 

    Project Updates

    Data development is currently underway for all the counties check back for project updates and the availability of draft data when data development is complete.

    Project Kickoff meetings

    September 14, 2021 | Big Horn/ City of Hardin/ Town of Lodge Grass | view slides

    September 15, 2021 | Treasure County | view slides

    September 15, 2021 | Yellowstone County | view slides

    September 16, 2021 | Rosebud County | view slides

    State Flood Hazard Viewer

    Draft data is not yet complete for the project areas. Once the data is complete it will be loaded onto the State Flood Hazard Viewer to share with the public.

    Know Your Property's Flood Risk
    Property owner fact sheets will become available once draft data is completed.
    Reports are available from the local Floodplain Administrator upon request.

    Contact Information

    For more information on the project please contact the local floodplain administrators.

    Big Horn County

    Sylvan Covers Up
    scoversup@bighorncountymt.gov 
    (406) 665-9735

    City of Hardin

    Nathan McConnell
    nmcconnell@hardinmt.com
    (406) 665-9260 ext 106

    Town of Lodge Grass

    Joe Lovato
    (406) 672-0510

    Treasure County

    Lindsey Kimball
    lkimball@treasurecountymt.com 
    (406) 342-5547

    Rosebud County

    Robert Lee
    rlee@rosebudcountymt.com 
    (406)346-2969

    City of Forsyth

    Richard Thompson
    rthompson@rangeweb.net 
    (406) 346-2728