Inspectioncurrent
NPMS FIPS 46051 / OPID 31632
NORTHWESTERN CORPORATION — Grant County, SD
Current as of source date Government source
Pipeline and Hazardous Materials Safety AdministrationOfficial agency material
View source Grant County, SDNORTHWESTERN CORPORATION (PHMSA OPID 31632) reported 31.521475 active Natural Gas pipeline miles in Grant County, SD (county FIPS 46051) 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.#