# NORTHWESTERN CORPORATION — Deuel County, SD

**Citation:** NPMS FIPS 46039 / OPID 31632  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

25.708975 active Natural Gas pipeline miles in Deuel County, SD; public NPMS snapshot 2026-07-16.

## Document text

NORTHWESTERN CORPORATION (PHMSA OPID 31632) reported 25.708975 active Natural Gas pipeline miles in Deuel County, SD (county FIPS 46039) 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.

## Provenance

- Official: Yes
- Source: <https://www.npms.phmsa.dot.gov/Documents/NPMS_Active_Pipe_County_Mileage.xlsx>
- Source ID: `npms-public-summaries`
- SHA-256: `5a3d21138f38a834f9c9188be44a0ea5ee17d6e07ee396c7545c5a701ced6276`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-26T22:42:38.558Z
- Document slug: `npms-mileage-4b29490e58228d5277a1126c`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "46039",
  "stateFips": "46",
  "state": "SD",
  "county": "Deuel County",
  "region": "Deuel County, SD",
  "operator": {
    "id": "31632",
    "name": "NORTHWESTERN CORPORATION"
  },
  "commodity": "Natural Gas",
  "mileage": 25.70897537,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 10501,
    "rowSha256": "e1c3cb20ab2d134a93dc8ff258d43aa85bc92c4f75bae43f5e777d0edc68f864"
  },
  "citedSections": [
    "191.29"
  ],
  "caveat": "Public aggregate snapshot only. It is not a complete representation of exact pipeline locations, may be updated, and is not an agency finding about facility condition.",
  "jurisdiction": "US",
  "operatorName": "NORTHWESTERN CORPORATION"
}
```