# NORTHERN NATURAL GAS CO — Day County, SD

**Citation:** NPMS FIPS 46037 / OPID 13750  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

40.15814 active Natural Gas pipeline miles in Day County, SD; public NPMS snapshot 2026-07-16.

## Document text

NORTHERN NATURAL GAS CO (PHMSA OPID 13750) reported 40.15814 active Natural Gas pipeline miles in Day County, SD (county FIPS 46037) 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: `a0c750b7bfb17e6eb669a1f63eba3c06a9f59d380e83c8e3429f728221a709f0`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-26T15:24:42.686Z
- Document slug: `npms-mileage-1dfccb0bfca2d27d18344244`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "46037",
  "stateFips": "46",
  "state": "SD",
  "county": "Day County",
  "region": "Day County, SD",
  "operator": {
    "id": "13750",
    "name": "NORTHERN NATURAL GAS CO"
  },
  "commodity": "Natural Gas",
  "mileage": 40.15814013,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 10497,
    "rowSha256": "fb8d4e49db341657d657ce51dced631f13f4c730c57bf02d8f6824a10abacd73"
  },
  "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": "NORTHERN NATURAL GAS CO"
}
```