{"operation":"document","citation":"NPMS FIPS 30003 / OPID 31632","title":"NORTHWESTERN CORPORATION — Big Horn County, MT","source_type":"inspection","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":"2026-07-16","effective_on":null,"summary":"39.871587 active Natural Gas pipeline miles in Big Horn County, MT; public NPMS snapshot 2026-07-16.","machine_formats":{"json":"https://regulus.evalyn.ai/document/npms-mileage-c5f6b2d2502a9e05f166491d.json","markdown":"https://regulus.evalyn.ai/document/npms-mileage-c5f6b2d2502a9e05f166491d.md"},"app_url":"https://regulus.evalyn.ai/document/npms-mileage-c5f6b2d2502a9e05f166491d","source_url":"https://www.npms.phmsa.dot.gov/Documents/NPMS_Active_Pipe_County_Mileage.xlsx","body":"NORTHWESTERN CORPORATION (PHMSA OPID 31632) reported 39.871587 active Natural Gas pipeline miles in Big Horn County, MT (county FIPS 30003) in the public NPMS summary snapshot dated 2026-07-16. The snapshot includes active assets only and excludes permanently abandoned assets. Exact pipeline locations and restricted NPMS GIS data are not included.","truncated":false,"body_characters":349}