Teton County City of Choteau have been working with the Federal Emergency Management Agency (FEMA) and Montana Department of Natural Resources and Conservation (DNRC) to update and produce new floodplain maps for the Teton River, Sun River, Spring Creek, Deep Creek, Muddy Creek and Tributaries.

Many of the existing floodplain maps are based on data from the late 1970s.  Updated Flood Insurance Rate Maps will provide more accurate, current, and detailed data and mapping of flood risk areas. For more information on the background of the floodplain maps click here.


2020 Project

DNRC with support from Teton County applied and received a grant from FEMA to update and produce new Flood Insurance Rate Maps for the county. Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually replace FEMA’s existing floodplain maps which are based on data from the 1970s.


A project kick off meeting was held with Teton County and City of Choteau on 9/03/2020
To view the meeting slides click here.

Below are the study extents for the project.


The project timeline below is just an estimate. Weather can delay data collection, data review and revisions can require some back and forth, but if the project goes according to plan below is the tentative project timeline.



Floodplain Fact Sheets

For additional questions contact your local floodplain administrator.

Brian Colesworthy
Teton County Floodplain Administrator

Jerry Grebenc
City of Choteau Floodplain Administrator