{"abstract":"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).","action":"Final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/03/10/2026-04649.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"91 FR 11474","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective on April 9, 2026.","disposition_notes":null,"docket_ids":["EPA-R08-OAR-2023-0641","FRL-12157-02-R8"],"dockets":[{"supporting_documents":[{"title":"Tribune News Now Cholla","document_id":"EPA-R08-OAR-2023-0641-0037"},{"title":"aq_aps_cholla_TitleV_app","document_id":"EPA-R08-OAR-2023-0641-0036"},{"title":"BART Analysis for Healy Power Plant Final Report","document_id":"EPA-R08-OAR-2023-0641-0035"},{"title":"EPA-R06-OAR-2016-0611-0071_attachment_84_Cholla_Unit_4_BART_Analysis","document_id":"EPA-R08-OAR-2023-0641-0033"},{"title":"United States v Minnkota Power Coop","document_id":"EPA-R08-OAR-2023-0641-0032"},{"title":"CEPCI Index","document_id":"EPA-R08-OAR-2023-0641-0031"},{"title":"CENC Cost Analysis","document_id":"EPA-R08-OAR-2023-0641-0030"},{"title":"Technical Support Document for Arizona's BART Analyses and Determinations","document_id":"EPA-R08-OAR-2023-0641-0028"},{"title":"SCR Catalyst Performance","document_id":"EPA-R08-OAR-2023-0641-0027"},{"title":"ND_RH2_SIPrevision_8-11-2022","document_id":"EPA-R08-OAR-2023-0641-0025"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2026-03-10","updated_at":"2026-03-10T10:00:19.581-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-R08-OAR-2023-0641-0019","allow_late_comments":false,"id":"EPA-R08-OAR-2023-0641-0019","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":29,"id":"EPA-R08-OAR-2023-0641","title":"ND Regional Haze SIP Round One Close Out"}],"document_number":"2026-04649","effective_on":"2026-04-09","end_page":11477,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/03/10/2026-04649.xml","html_url":"https://www.federalregister.gov/documents/2026/03/10/2026-04649/air-plan-approval-north-dakota-approval-of-air-quality-implementation-plans-regional-haze-state","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-04649?publication_date=2026-03-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-03-10/2026-04649/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":244,"last_updated":"2026-07-28 12:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-03-10/pdf/2026-04649.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-04649.pdf?1773060312","publication_date":"2026-03-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/03/10/2026-04649.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Tribune News Now Cholla","document_id":"EPA-R08-OAR-2023-0641-0037"},{"title":"aq_aps_cholla_TitleV_app","document_id":"EPA-R08-OAR-2023-0641-0036"},{"title":"BART Analysis for Healy Power Plant Final Report","document_id":"EPA-R08-OAR-2023-0641-0035"},{"title":"EPA-R06-OAR-2016-0611-0071_attachment_84_Cholla_Unit_4_BART_Analysis","document_id":"EPA-R08-OAR-2023-0641-0033"},{"title":"United States v Minnkota Power Coop","document_id":"EPA-R08-OAR-2023-0641-0032"},{"title":"CEPCI Index","document_id":"EPA-R08-OAR-2023-0641-0031"},{"title":"CENC Cost Analysis","document_id":"EPA-R08-OAR-2023-0641-0030"},{"title":"Technical Support Document for Arizona's BART Analyses and Determinations","document_id":"EPA-R08-OAR-2023-0641-0028"},{"title":"SCR Catalyst Performance","document_id":"EPA-R08-OAR-2023-0641-0027"},{"title":"ND_RH2_SIPrevision_8-11-2022","document_id":"EPA-R08-OAR-2023-0641-0025"}],"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-R08-OAR-2023-0641","supporting_documents_count":29,"docket_id":"EPA-R08-OAR-2023-0641","document_id":"EPA-R08-OAR-2023-0641-0019","regulation_id_number":null,"title":"ND Regional Haze SIP Round One Close Out","checked_regulationsdotgov_at":"2026-03-11T16:55:10Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":11474,"subtype":null,"title":"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","toc_doc":"North Dakota; 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","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Carbon monoxide","Environmental protection","Greenhouse gases","Incorporation by reference","Intergovernmental relations","Lead","Nitrogen dioxide","Ozone","Particulate matter","Reporting and recordkeeping requirements","Sulfur oxides","Volatile organic compounds"],"type":"Rule","volume":91}