Air Plan Approval; North Dakota; Approval of Air Quality Implementation Plans; Regional Haze State Implementation Plan; Regional Haze Five Year Progress Report and Nitrogen Oxides Best Available Retrofit Technology Determination for Coal Creek Station for the First Implementation Period

The Environmental Protection Agency (EPA) is approving 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 approving North Dakota's nitrogen oxides (NO<INF>X</INF>) 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, 2013, vacatur and remand of the portion of EPA's 2012 Regional Haze Federal Implementation Plan (FIP) that promulgated a BART emission limit of 0.13 pounds per million BTU (lb/ MMBtu) NO<INF>X</INF> (30-day rolling average) for Coal Creek. The EPA is taking this action pursuant to the Clean Air Act (CAA).