NORTHWESTERN CORPORATION — Madison County, MT

Current as of source date Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

Madison County, MTNORTHWESTERN CORPORATION (PHMSA OPID 31632) reported 38.952152 active Natural Gas pipeline miles in Madison County, MT (county FIPS 30057) 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.#