Below is the most current technical information available for the West Gallatin River and Bozeman Creek Mapping Re-studies. FEMA's Preliminary Flood Insurance Rate Maps and Preliminary Flood Insurance Study will go through an official comment and appeal period from September 20 - December 18, 2018. Once submitted comments and appeals are resolved, the maps are expected to be finalized and become effective in late 2019. 

Preliminary Flood Insurance Study (FIS)
Preliminary FIS: Volume 1   Prepared by FEMA (Revised 2/16/18)
Preliminary FIS: Volume 2   Prepared by FEMA (Revised 2/16/18) 
Preliminary FIS: Volume 3   Prepared by FEMA (Revised 2/16/18)  

Preliminary Flood Insurance Rate Maps
Index 1B
Index 2B 

Hydrologic Reports
Hydrologic Analysis: Bozeman Creek   Prepared by RESPEC (April 2014)
Hydrologic Analysis: Nash Spring   Prepared by RESPEC (March 2014)
Hydrologic Analysis: Flat Creek   Prepared by RESPEC (January 2014)
Hydrologic Analysis: Figgins Creek   Prepared by RESPEC (March 2014)
Hydrologic Analysis: Mathew-Bird Creek   Prepared by RESPEC (March 2014)
Hydrologic Analysis: Mill Ditch   Prepared by RESPEC (April 2014)
West Gallatin Hydrology Report   Prepared by Morrison-Maierle, Inc. (March 2015) 

Hydraulic Reports
Hydraulic Analysis Report: Bozeman Creek (all reaches)  Prepared by Michael Baker (Oct 2015)
West Gallatin Hydraulic Summary Report   Prepared by Morrison-Maierle, Inc. (Jan 2016) 

Technical data
Technical data for Bozeman Creek and its tributaries is available on the City of Bozeman's FTP site. Click here to download the Community_Upload_Format.zip file. Then decompress the file to view technical data including hydrologic analyses, flood profiles, floodway data tables, and HEC-RAS modeling files.