ND Regional Haze SIP Round One Close Out

The Environmental Protection Agency (EPA) is proposing to approve certain portions of State Implementation Plan (SIP) revisions submitted by the State of North Dakota (North Dakota) on January 12, 2015, and August 11, 2022, to address regional haze. Specifically, the EPA is proposing to approve North Dakota’s nitrogen oxides (NOX) Best Available Retrofit Technology (BART) determination for Coal Creek Station power plant (Coal Creek) for the first implementation period of the regional haze program and North Dakota’s five-year regional haze progress report. This action addresses the United States Court of Appeals for the Eighth Circuit’'s September 23, 2012 vacatur and remand of the portion of the EPA’s 2012 Regional Haze Federal Implementation Plan (FIP) that promulgated a BART emission limit of 0.13 lb/MMBtu NOX (30-day rolling average) for Coal Creek. The EPA is taking this action pursuant to the Clean Air Act (CAA).