Floodplain

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Flood Insurance Rate Maps (FIRMs) for the City of Bozeman are being updated by the Federal Emergency Management Agency (FEMA). FEMA has recently released a preliminary version of new FIRMs. A finalized version is expected in 2018.

Floodplain Map Viewer

Use the Floodplain Map Viewer to determine if your property is located in a floodplain.

floodplain map screenshot

You can also view the Preliminary Flood Insurance Rate Maps and the Preliminary Flood Insurance Study at the links below. Note that any information on the preliminary FIRMs and within the Preliminary Flood Insurance Study may be formally challenged during FEMA's official 90-day Appeal and Comment Period (expected June 2017). In the interim, the City of Bozeman welcomes your questions.

Understand the effects of owning property in a Floodplain

Local development regulations and federal flood insurance requirements apply to properties in mapped floodplain areas on a FIRM. More information on flood floodplain areas designated on a FIRM is provided below:

Attend a Public Meeting on January 24, 2017

City of Bozeman will be hosting an Open House at the Bozeman Public Library from 6p - 8p on January 24 to help property owners review the preliminary FIRMs. At the Open House you can:

  • Speak with City or DNRC Staff one-on-one about how the preliminary FIRM could affect your property.
  • Hear a short informational presentation about the floodplain mapping project at 6:15 pm, 7:15 pm.

Submit a comment or appeal during the official 90-Day Appeal and Comment Period

We expect the official FEMA 90-day Appeal and Comment period to run June 2017 - September 2017 (exact dates TBD). During that time you may submit an official Appeal or Comment about information on a preliminary FIRM.

Appeals are technical in nature and must contain data and documentation that clearly shows an inaccuracy or error was committed by FEMA.

Comments are generally non-technical in nature and related to issues with mapping annotations such as road names, or pointing out errors with political boundaries, etc.

To submit an appeal or comment, please complete an Appeal & Comment Form. Official FEMA criteria for appeals of FIRMs provided in the link below.

Obtain Technical Data

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


Currently Effective Flood Insurance Rate Maps (dated 9/2/2011)

Currently effective FIRMs for the City of Bozeman have an effective date of September 2, 2011. These Flood Insurance Rate Maps replaced the 1988 version of the maps and substantially revised the Special Flood Hazard Areas mapped for the East Gallatin River and portions of Bridger Creek.  No change in the mapped SFHA was made for Bozeman Creek and its tributaries with the 2011 FIRMs.

Members of the public are encouraged to view the official maps to determine if their property is effected. Hard copies are available for viewing at the City of Bozeman Engineering Department, located in the Stiff Professional Building at 20 E. Olive Street.  The 2011 FIRMs can be viewed and downloaded at the links below.

The FIRMs are also officially maintained in an online web map format by FEMA.

The City of Bozeman does not maintain official floodplain maps for Gallatin County.  For information concerning official FEMA flood maps for properties outside of City of Bozeman limits, please contact the Gallatin County Floodplain Administrator with the Gallatin County Planning Department by calling 406-582-3130.

Flood Insurance

All structures with federally secured mortgages located in a Special Flood Hazard Area (SFHA) are required by federal law to carry a flood insurance policy.  Flood insurance is underwritten by the federal government and is made available through the National Flood Insurance Program (NFIP).  A typical homeowner or business owner insurance policy does not cover flood damages.  Flood policies may be purchased from qualified local insurance agents.  To learn more about the NFIP or to locate a local NFIP insurance agent visit www.floodsmart.gov.

Emergency Management

Portions within the city limits of Bozeman are subject to flood hazards from waterways within the City.  These flood hazards are generally characterized on the Flood Insurance Rate Maps issued by FEMA, however the FIRMs do not map floodplains for every waterway within the City.  Flood hazards exist for any property located adjacent to waterways whether FEMA has officially mapped the floodplain or not.  Gallatin County Emergency Management is responsible for coordination of public safety agencies during a flooding emergency.  To learn what you can do to prepare for a flooding event visit www.readygallatin.com/flooding.

Real-Time Stream Gauge Data

The United States Geologic Survey (USGS) maintains an active stream gauge on the East Gallatin River near Bozeman below its confluence with Bridger Creek.  See a complete listing of all USGS stream gauges in Montana.  Those interested may sign up for the USGS Water Alert service for the East Gallatin stream gauge and receive email or text alerts when user-defined gauge data thresholds are exceeded.

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