Synthetic Minor NSR Permit: NorthWestern Energy Corporation - Meriwether Compressor Station
This page contains access to the synthetic minor NSR permit, application, air quality modeling files and other supporting documentation for a modification of the NorthWestern Energy Corporation Meriwether Compressor Station, located on Indian country lands within the Blackfeet Indian Reservation in Montana. The EPA held a public comment period on the proposed permit from September 29 through October 31, 2022. The final permit was issued on December 5, 2022, with an effective date of January 4, 2023.
Note: Due to file type restrictions, the modeling files and Air Quality Impacts Analysis (AQIA) are posted on this page, while other supporting documentation, such as the permit application, may be accessed in regulations.gov in the docket for this permit action, Docket #EPA-R08-OAR-2022-0345.
NWE Meriwether CS AERMAP Files (zip)
NWE Meriwether CS AERMET Files (zip)
NWE Meriwether CS AERMOD Files (zip)