Public Notices - Air Quality Permits

The Air Compliance Program is responsible for administering those portions of the Clean Air Act (CAA) of Montana (Section 75-2-101 et seq., MCA) and companion regulations pertaining to compliance of air emissions from various types of facilities including delegated federal regulations.

Public Notices

Notes: For recent final permits, click the link above. For permits before 2010 please see the Data Search Tools.

The below list includes:

  • Montana Air Quality Permits (MAQPs)
  • Title V Operating Permits (OPs)

Use the field below to search by Permit Number, Facility Name, Location, or description of the facility.

PermitNumber Facility/Permit Facility Description/Source Time Frame Site Location  
OP2428-15 TRD2428-15 NorthWestern Energy – Mainline #1 Natural gas compressor station Public Comment Period Ends November 27, 2020

S ½ of Section 22, Township 33 North, Range 5 West in Silver Bow County

Julie Ackerlund
OP2035-04 TRD2035-04 Colstrip Energy Limited Partnership Electrical  Generating Unit Appeal Period Ends November 26, 2020 Northeast ¼ of Section 32, Township 3 North, Range 41 East in Rosebud County Craig Henrikson
5256-00 Crusoe Energy Systems, Inc. – Rowin 17-5 CTB Natural Gas-fired Generator Engines Public Comment Period Ends October 30, 2020 Section 20, Township 26 North, Range 59 East, Richland County John Proulx
5255-00 Crusoe Energy Systems, Inc. – Dagney 33-21 CTB Natural Gas-fired Generator Engines Public Comment Period Ends October 30, 2020 Section 4, Township 25 North, Range 59 East, Richland County John Proulx
0691-06 Montana-Dakota Utilities – Lewis & Clark Station Electricity Generation Appeal Period Ends October 28, 2020 SW 1/4 of Section 9, Township 22 N, Range 59 E in Richland County Julie Ackerlund
OP2602-07 TRD2602-07 Weyerhaeuser NR – Evergreen Facility Sawmill and Plywood Facility EPA's 45-day Review ends November 23, 2020

SW Quarter of Section 33, Township 29 North, Range 21 West, Flathead County

Julie Ackerlund
OP1628-07 TRD1628-07 Hathaway Compressor Station Natural Gas Compressor Station Public Comment Period Ends November 6, 2020 NE¼ of the SE¼, Section 34 of Township 7 North, Range 45 East, Custer County Julie Ackerlund
OP3395-05 TRD3395-05 Montana Silversmiths Inc Manufacturer of western belt buckles and jewelry Appeal Period Ends November 5, 2020 Section 28 of Township 2 South, Range 20 East, Stillwater County Julie Ackerlund
OP3237-04 TRD3237-04 SSP-SiMatrix Production of silicon based medical devices Public Comment Period Ends October 31, 2020 SW1/4 of Section 31, Township 7N, Range 20W, in Ravalli County Troy Burrows
5254-00 Wibaux 1 and Wibaux 2 Pump Stations Two adjacent natural gas liquids pump stations Public Comment Period Ends November 2, 2020 Section 9, Township 16N, Range 60E in Wibaux County Julie Ackerlund
OP4256-03 TRD4256-03 Basin Electric Power Cooperative - Culbertson Generating Station Culbertson electrical generating station Public Comment Period Ends October 25, 2020 Section 5, Township 28 North, Range 57 East Roosevelt County Troy Burrows
OP2161-16 TRD2161-16 Calumet Montana Refining, LLC Great Falls Petroleum Refinery EPA's 45-day Review ends October 29, 2020

NE Quarter of Section 1, Township 20 North, Range 3 East in Cascade County

Shawn Juers