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DNRC Headquarters
1539 Eleventh Ave. Helena, MT 59601
Phone: (406) 444-2074 | Fax: (406) 444-2684
Questions? Email us

Musselshell River Flood Maps Update

Musselshell Flooding
Photo credit: Chris Boyer, 2011

The Musselshell River communities are currently working with the Federal Emergency Management Agency (FEMA) and the Montana Department of Natural Resources and Conservation (DNRC) to update floodplain maps for the Musselshell River.  New floodplain maps will depict the latest, most accurate flood risk data, allowing property owners and communities to better understand their flood risk and to protect themselves against flooding.

There will be insurance and development regulation implications for structures going into and coming out of the 100-Year Floodplain when the maps become effective (expected Februrary 2017 for the Roundup Area and Fall 2018 for the rest of the Musselshell communities). Property owners should educate themselves and prepare for the adoption of the new floodplain maps by taking the steps below.

Roundup Area Comment & Appeal Period Starting Soon

The Roundup Area project is tracking faster than other portions of the Musselshell. The FEMA 90-Day Comment and Appeal Period for the Roundup Area is expected to begin around February 2017 and the map is expected to go effective around May 2017. We will announce exact dates as soon as that information becomes available.

Check out these fact sheets for more information about what it means to live in a flood zone:
Roundup: 100-Year Floodplain
Roundup: Floodway (Within 100-Year Floodplain) 
Roundup: 500-Year Floodplain

Any property owners looking for more information on the Comment and Appeal Period for the Roundup Area should consider attending the Roundup/Musselshell Public Open House on February 1. Information can also be found at the links below:
Roundup: Comment & Appeal Period Info Sheet
Roundup: Comment & Appeal Form 

Know your property's flood risk

Draft floodplain maps from this project are currently available for Musselshell, Rosebud, and Petroleum counties at the link below. According to the draft floodplain maps, some structures will be moving into the 100-Year Floodplain and some will be moving out of the 100-Year Floodplain. 

Musselshell Viewer Button 2

Attend a public meeting

Roundup/Musselshell Public Open House
Wednesday, February 1, 5:00pm-7:00pm
Roundup City Hall (34 3rd Ave)

During this open house, staff from the Montana DNRC, the City of Roundup, and Musselshell County will be on hand to review floodplain maps one-on-one with property owners and answer specific questions. There will also be a short, informational presentation at 5:15pm regarding the project and project updates. 

We will schedule public open houses for Golden Valley and Wheatland Counties in early 2017 to discuss this project with affected property owners there--stay tuned for updates. If you are unable to attend a meeting and/or need more information about this project, contact with Montana DNRC.

Get technical information

Do you have questions about the Musselshell River Flood Maps Update project? Check out our page with Floodplain Work Maps (Draft Maps) and technical data/reports.

Come back for more information

We will update this website with new, relevant information as the Musselshell River Flood Maps Update project moves forward.


More Info

Draft Maps & Technical Data
Musselshell Watershed Coalition 

Contact Info

Adam Carlson
Musselshell County
(406) 323-2777

Tiffany Lyden
Montana DNRC
(406) 444-0599