# NORTHWESTERN CORPORATION — Grant County, SD

- **operation:** document
- **citation:** NPMS FIPS 46051 / OPID 31632
- **title:** NORTHWESTERN CORPORATION — Grant County, SD
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** 2026-07-16
- **effective on:** Not available
- **summary:** 31.521475 active Natural Gas pipeline miles in Grant County, SD; public NPMS snapshot 2026-07-16.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/npms-mileage-f248a1463105498a0b160272.json
- **markdown:** https://regulus.evalyn.ai/document/npms-mileage-f248a1463105498a0b160272.md
- **app url:** https://regulus.evalyn.ai/document/npms-mileage-f248a1463105498a0b160272
- **source url:** https://www.npms.phmsa.dot.gov/Documents/NPMS_Active_Pipe_County_Mileage.xlsx
**body:**

NORTHWESTERN 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.
- **truncated:** false
- **body characters:** 346