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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

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NWO-2015-00766-MTH - 12/26/2017: Regal Talc Mine expansion consists of modifying and or relocating approximately 1330 linear feet of Hoffman Creek impacting 0.72 acre of wetland. The impacted Hoffman Spring Creek channel reach of approximately 730 linear feet is located on the downstream half of the drainage immediately above its confluence with Hoffman Creek. The 730 linear feet of impacted Hoffman Spring Creek channel includes about 530 linear feet that will be removed by the expanded mine pit (including adjacent safety bench, berm, and access road), and about 200 linear feet that will be affected by construction of the uppermost part of the realigned channel, including a catchment basin and cutoff wall. The engineered realigned channel will extend from the new catchment basin constructed in the existing channel, and then to Hoffman Creek through uplands, with an elevation change of approximately 47 feet. At the confluence, the realigned channel will merge with the natural Hoffman Creek channel, and will include a groundwater cutoff wall constructed beneath and perpendicular to Hoffman Creek immediately upstream of the confluence. All of these areas are characterized by intermittent stream flow. The impacted Hoffman Creek channel of approximately 600 linear feet will be located both upstream and downstream of its confluence with Hoffman Spring Creek. The modification will consist of channel consolidation with natural sealing minerals (bentonite) mixed to a depth of approximately 6 inches, and native soft armoring utilizing existing channel debris/stone and local riparian cuttings.
Expiration date: 1/23/2018


2017 Nationwide Permit Reissuance and Montana Regional Conditions - 3/18/2017: On January 6, 2017, the U.S. Army Corps of Engineers (Corps) published the notice in the Federal Register announcing the reissuance of all 50 existing nationwide permits (NWPs), general conditions, and definitions with some modifications. The Corps also issued two new NWPs, one new general condition, and five new definitions. The 2017 NWPs will go into effect on March 19, 2017, and will expire on March 18, 2022. After publication of the FR notice, Corps districts finished development of regional conditions for the reissued NWPs. Regional conditions provide additional protection by ensuring that NWPs authorize only those activities with minimal adverse effects on the aquatic environment. Regional conditions also help ensure protection of high value waters within specific geographic areas. By this public notice the Northwestern Division Engineer establishes the enclosed regional conditions applicable to the NWP program in Montana.
Expiration date: 3/25/2022

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