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1539 Eleventh Ave. Helena, MT 59601
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Gallatin Mapping Updates

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Gallatin County is working with the Federal Emergency Management Agency (FEMA) and Montana Department of Natural Resources and Conservation (DNRC) to update Flood Insurance Rate Maps for the West Gallatin River and Bozeman Creek and its tributaries. New Flood Insurance Rate Maps from this project are expected to be finalized in late 2019 after a technical and public review process.  

When finalized, the new maps could have effects on some property owners in mapped floodplains. If you are currently or will be mapped into a 100-Year Floodplain, see the 100-Year Floodplain link to understand what this means. Additionally, you can prepare for the adoption of new Flood Insurance Rate Maps by taking the steps below.

FEMA 90-Day Appeal and Comment Period


The Appeal and Comment period on the preliminary maps and study ended December 18, 2018. All comments and appeals have been submitted to FEMA for review. Thank you to everyone who submitted comments and information on the preliminary maps and study. Updates and information will be made available here once the review has been completed.  

Appeal & Comment Fact Sheet

View Preliminary Floodplain Maps

FEMA issued Preliminary Flood Insurance Rate Maps for this project in November 2016. Early comments prompted a review and revision of one area - the West Gallatin River near Shed's Bridge. A Revised Preliminary Flood Insurance Rate Map Panel #30031C0790E was issued on 2/16/18 to replace the initial Preliminary Flood Insurance Rate Map Panel.  

The map viewer below shows all the preliminary map data, including the revised area.  You can also view the Preliminary and Revised Flood Insurance Rate Map panels by visiting the Maps & Technical Reports page. 


Get more information on floodplain designations referenced on the maps:

Newly Mapped into a 100-Year Floodplain? See Low Cost Insurance Options

Public Meetings Held

Gallatin County, the City of Bozeman, Montana DNRC, and FEMA hosted several Public Open Houses in January 2016 and in January 2017 to review the draft maps and Preliminary Flood Insurance Rate Maps and talk with property owners one-on-one about the proposed floodplain map changes.

An additional open house was held in March 2018 for landowners in the revised area of the West Gallatin River near Shed's bridge.

Join our email list to stay informed on project updates

The process of publicly reviewing and adopting new Flood Insurance Rate Maps will take a couple years. We will keep affected and concerned property owners informed as best we can during this process. If you would like to stay informed on the Flood Insurance Rate Map adoption process via email, please opt in to our email list on the right side of the page. 

Come back for more information

We will update this website with new, relevant information as the Gallatin County Flood Insurance Rate Map adoption process progresses. Also, visit the links on the right side of the page, including our Floodplain FAQs link, for more in-depth information.

Know your property's flood risk

Flood Insurance Rate Maps indicate areas of increased flood risk. Once this project is complete, Gallatin County Flood Insurance Rate Maps will provide more accurate, current, and detailed data and mapping of flood risk areas.  

If your house or building will be newly mapped into a 100-year floodplain, click here: Low Cost Insurance Options

Obtain Technical Data

Technical data for the West Gallatin and Bozeman Creek and tributaries floodplain mapping project is available for download on the City of Bozeman's file share site.  Data including hydrologic analyses, flood profiles, floodway data tables, and HEC-RAS modeling files are available.  Contact the City of Bozeman Engineering Department if you have trouble accessing the file share site.


More Info 

Maps & Technical Reports
Gallatin Floodplain FAQs 


Contact the County

Gallatin County Planning 
(406) 582-3130

Stay Updated

Subscribe to the Gallatin Flood Insurance Rate Map Updates email list below. 

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