Montana Regulatory Offices

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 Billings Office

Box 7032
Billings, Montana 59103
Ph: 406-657-5910
Fax: 406-657-5911

 Helena Office

100 Neill Avenue
Helena, Montana 59601-3329
Ph: 406-441-1375
Fax: 406-441-1380

 Missoula Office
1600 North Ave. West, Suite 105
Missoula, Montana 59801
Ph: 406-541-4845
Fax: 406-541-4849

Public Notices

  • NWO-2024-01305-MT

    Expiration date: 11/29/2024

    The U.S. Army Corps of Engineers, Omaha District, (Corps) is evaluating a permit application, which would result in permanent and temporary impacts to approximately 0.69 acre of emergent wetlands and approximately 60 linear feet (LF) of stream and ditch waters of the United States. This notice is to inform interested parties of the proposed activity and to solicit comments.

  • Regional Streamflow Duration Assessment Methods for the Arid West, Western Mountains, and Great Plains

    The U.S. Army Corps of Engineers (Corps) Albuquerque, Chicago, Detroit, Fort Worth, Galveston, Kansas City, Los Angeles, Omaha, Rock Island, Sacramento, San Francisco, St. Louis, St. Paul, and Tulsa Districts, and the U.S. Environmental Protection Agency (EPA), Regions 5, 6, 7, 8, and 9 jointly announce the availability of the Regional Streamflow Duration Assessment Methods (Regional SDAMs) for the Arid West, Western Mountains and Great Plains. The methods are rapid assessment tools for distinguishing between ephemeral, intermittent, and perennial streamflow at the reach scale for the Arid West, Western Mountains and Great Plains regions.

  • NWO-2024-01287-MT

    Expiration date: 10/24/2024

    The U.S. Army Corps of Engineers, Omaha District, (USACE) is evaluating a prospectus by Westervelt Ecological Services for a new Yellowstone River Mitigation Bank Site (YRMBS). The bank would provide compensatory mitigation credits within the Upper Yellowstone (HUC 100700) watershed that are fully compliant with the Compensatory Mitigation for Losses of Aquatic Resources. This notice is to inform interested parties of the proposed activity and to solicit comments.