US Army Corps of Engineers
Omaha District Website

Montana Regulatory Offices

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Post Office Box 2256
Billings, Montana 59103
Ph: 406-657-5910
Fax: 406-657-5911

10 West 15th Street, Suite 2200
Helena, Montana 59626
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

  • Special Public Notice - 2021 Nationwide Permits

    Expiration date: 4/9/2021

    Special Public Notice for the Nationwide Permit Reissuance and Regional Conditions for the State of Montana. Montana DEQ, EPA Region 8, and Tribal Water Quality Certifications (WQC) are attached separate from the public notice below.

  • NWO-2011-01760-MTM

    Expiration date: 3/15/2021

    The U.S. Army Corps of Engineers, Omaha District, is evaluating a request by Montana Aquatic Resources Services (MARS) to add an In-Lieu Fee compensatory mitigation site to the Program’s Instrument, updated in May 2020. The Proposed Site 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.

  • NWO-2009-00478-MTB

    Expiration date: 3/3/2021

    The U.S. Army Corps of Engineers, Omaha District, (Corps) is evaluating a permit application from 44 Big Sky Farms, LLC. The proposed project includes the placement of 1,730 linear feet (LF) of rock riprap in an area that was previously protected with riprap that failed in 2014. The new riprap would extend 15-feet into the river from low-water’s edge and extend 15-feet back from low-water’s edge. This would result in a discharge of 3,580 Cubic Yards (CY) of fill material, below the ordinary high-water mark (OHWM) of the Yellowstone River.