Inspectioncurrent
NPMS FIPS 30049 / OPID 31632
NORTHWESTERN CORPORATION — Lewis and Clark County, MT
Current as of source date Government source
Pipeline and Hazardous Materials Safety AdministrationOfficial agency material
View source Lewis and Clark County, MTNORTHWESTERN CORPORATION (PHMSA OPID 31632) reported 130.873252 active Natural Gas pipeline miles in Lewis and Clark County, MT (county FIPS 30049) 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.#