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-2009-00478-MT

    Expiration date: 4/12/2024

    The U.S. Army Corps of Engineers, Omaha District, (USACE) is evaluating a permit modification for the second phase of a previously permitted bank stabilization project on the Yellowstone River. The proposed project modification includes the placement of 1,440 linear feet (LF) of native alluvium in an area containing streambanks averaging 5.5-foot-high cut banks of sandy loam soils overlaying river alluvium. This would result in a discharge of 2,070 cubic yards (CY) of fill material, below the ordinary high-water mark (OHWM) of the Yellowstone River. This would include the use of native alluvium excavated from a medial gravel bar within the project area. This excavation area is approximately 66,270 square feet. Large woody debris, consisting of cottonwood logs sourced from the gravel bar will be integrated into the proposed gravel revetment. The applicant will also install approximately 3,000 individual dormant willow cuttings into the bank slope to assist in the stabilization of the previously failed bank. The project would result in permanent impacts to approximately 2.04 acres of the Yellowstone River. This notice is to inform interested parties of the proposed activity and to solicit comments.

  • NWO-2024-00345-MT

    Expiration date: 4/21/2024

    The U.S. Army Corps of Engineers, Omaha District, (USACE) is evaluating a request to develop a compensatory mitigation site servicing the Lower Clark Fork watershed, by restoring, rehabilitating, and enhancing approximately 15.8 acres of the Upland Buffer and approximately 23.8 acres of wetlands adjacent to the Thompson River, waters of the United States to achieve a maximum of 19.40 wetland mitigation credits. This notice is to inform interested parties of the proposed compensatory mitigation bank and to solicit comments.

  • NWO-2018-00230-MT

    Expiration date: 3/6/2024

    The U.S. Army Corps of Engineers, Omaha District, (Corps) is evaluating a request to develop a compensatory mitigation site under the Montana Department of Transportation’s (MDT) statewide compensatory mitigation umbrella bank, approved on October 24, 2023. This 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. The proposed mitigation site would cover stream and wetland impacts permitted under Section 404 of the Clean Water Act for MDT projects within Watershed #3 – Lower Clark Fork River Basin (WS 3).