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

Draft and 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 Draft Floodplain Maps

This draft data is being used to produce FEMA's Preliminary Flood Insurance Rate Maps and Preliminary Flood Insurance Studies. We will post FEMA's preliminary products as soon as they are available (expected early 2018).

 Index

Map 1 Map 7 Map 13 Map 19
Map 2 Map 8 Map 14 Map 20
Map 3 Map 9 Map 15 Map 21
Map 4 Map 10 Map 16 Map 22
Map 5 Map 11 Map 17
Map 6 Map 12 Map 18 


Golden Valley County Draft Floodplain Maps

This draft data is being used to produce FEMA's Preliminary Flood Insurance Rate Maps and Preliminary Flood Insurance Studies. We will post FEMA's preliminary products as soon as they are available (expected early 2018). 

 Index

Map 1 Map 6 Map 11
Map 2 Map 7 Map 12
Map 3 Map 8 Map 13
Map 4 Map 9 Map 14
Map 5 Map 10



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: