Montana Regulatory Offices

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

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

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

Public Notices

  • NWO-2011-01760-MT

    Expiration date: 12/12/2022

    The U.S. Army Corps of Engineers, Omaha District, (USACE) is evaluating a request by Montana Aquatic Resources Services (MARS), now known as Montana Freshwater Partners (MFP), to add an In-Lieu Fee (ILF) compensatory mitigation site to the Program’s Instrument, updated in May 2020. The Proposed Site Plan (Plan) is the first phase of mitigation site evaluation. It is intended to determine whether the site has enough potential to warrant development of a more detailed Draft Mitigation Site Plan. This notice is to inform interested parties of the proposed activity and to solicit comments. The proposed mitigation site would cover the Flathead Watershed (#4). The project described herein is not being proposed by USACE, but by the project proponent; USACE will evaluate the proposed work to determine if it is allowable under current laws and regulations.

  • Special Public Notice for Resources to Support Carbon & Stillwater County Post-Flooding

    Expiration date: 11/18/2022

    U.S. Army Corps of Engineers (USACE) will be staging USACE Montana Regulatory personnel at key locations within Carbon and Stillwater Counties to assist local applicants with post-flooding related permitting.

  • Regional General Permit 00-05, Amendment 4

    Expiration date: 11/29/2022

    The U.S. Army Corps of Engineers, Omaha District, is proposing to reissue and expand coverage of Regional General Permit (RGP) 00-05 for bank stabilization projects conducted by the Corps or South Dakota Game, Fish & Parks to protect culturally significant site on Corps Lakes in North Dakota, South Dakota and Montana. Drought conditions in the Missouri River basin persist and sites are being evaluated and protected as needed. To prevent a lapse in coverage while this proposal is being evaluated, the existing RGP is being extended through December 31, 2022. All comments should be sent to the North Dakota Regulatory Office at