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

Preliminary Maps


Below is the most current technical information available for the Musselshell River Flood Maps Project. Due to the large scale of the project, the draft floodplain maps are organized into Sections.


Wheatland County Preliminary Floodplain Maps

This includes Wheatland County. Click here to access the Preliminary Flood Insurance Study.

 Index

Panel 0450C Panel 0520C Panel 0537C Panel 0590C Panel 0810C
Panel 0475C Panel 0529C Panel 0541C Panel 0605C Panel 0815C
Panel 0500C Panel 0530C Panel 0545C Panel 0700C Panel 0820C
Panel 0509C Panel 0533C Panel 0565C Panel 0780C
Panel 0510C Panel 0535C Panel 0570C Panel 0785C
Panel 0517C Panel 0536C Panel 0585C  Panel 0805C


Golden Valley County Preliminary Floodplain Maps

This includes Golden Valley County. Click here to access the Preliminary Flood Insurance Study. 

 Index

Panel 0485B Panel 0535B Panel 0570B Panel 0593B Panel 0618B
Panel 0495B Panel 0536B Panel 0587B Panel 0611B
Panel 0515B Panel 0540B Panel 0590B Panel 0612B
Panel 0517B Panel 0545B Panel 0591B Panel 0613B
Panel 0520B Panel 0565B Panel 0592B Panel 0614B



Petroleum County Preliminary Floodplain Maps

This includes two portions of the Musselshell River in Petroleum County, from north to south. Click here to access the Preliminary Flood Insurance Study.
Index 

Panel 0355A Panel 0375A Panel 0638A Panel 0776A
Panel 0362A Panel 0537A Panel 0639A Panel 0777A
Panel 0364A Panel 0539A Panel 0702A
Panel 0365A Panel 0545A Panel 0706A


Rosebud/Musselshell County Border Preliminary Floodplain Maps

This includes the Musselshell River on the Rosebud/Musselshell border, from north to south and ending at Melstone. Click here to access the Preliminary Flood Insurance Study

 Index

Panel 1040C

Panel 1415C
Panel 1405C Panel 1420C
Panel 1410C Panel 1780C


Roundup Area Preliminary FEMA Map Revisions

This includes 10 miles of the Musselshell River in the Roundup Area, from east to west (from the intersection of Highway 12 & Watkins Road to the intersection of Highway 12 & Johnson Road). The timeline for the Roundup Area floodplain map revision was shorter than the rest of the Musselshell project's sections because it was funded earlier. The Roundup Area maps became effective on July 13, 2017.

Click the link to view the City of Roundup Map Revisions.
Click the link to view the Musselshell County Map Revisions


Musselshell County Preliminary Floodplain Maps

This includes the Musselshell River beginning at Melstone and traveling west to the Golden Valley border (minus the Roundup Area in Section 3). Click here to access the Preliminary Flood Insurance Study

 Index

Panel 0190C Panel 0470C Panel 0690C Panel 0720C Panel 0829C Panel 0838C Panel 0853C Panel 0870C Panel 1020C
Panel 0395C Panel 0595C Panel 0695C Panel 0730C Panel 0833C Panel 0839C Panel 0854C Panel 0880C Panel 1030C
Panel 0425C Panel 0645C Panel 0700C Panel 0735C Panel 0834C Panel 0841C Panel 0856C Panel 0885C Panel 1035C
Panel 0455C Panel 0660C Panel 0705C Panel 0740C Panel 0835C Panel 0845C Panel 0857C Panel 0925C Panel 1051C
Panel 0460C Panel 0665C Panel 0710C Panel 0745C Panel 0836C Panel 0851C Panel 0858C Panel 1010C Panel 1060C
Panel 0465C Panel 0670C Panel 0715C Panel 0819C Panel 0837C Panel 0852C Panel 0859C Panel 1018C

Technical information
 

Technical Reports:

Pioneer Technical Services, Inc (Butte, MT) and Morrison-Maierle, Inc (Helena, MT) have been contracted to perform a majority of the data collection, engineering, and technical work. Some studies have been completed and may be viewed below.  The remaining studies to be completed will also be made available here when they are final.


Survey crews were on the river through the summer of 2015. Thank you to all the landowners along the Musselshell River and Antelope Creek who gave the contractors working on this project permission to cross the landowner's property. Their willingness to assist with this project is greatly appreciated.

Maps of the Musselshell River Study Region: