# GAS TRANSMISSION NORTHWEST LLC — Gilliam County, OR

**Citation:** NPMS FIPS 41021 / OPID 15014  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

63.213261 active Natural Gas pipeline miles in Gilliam County, OR; public NPMS snapshot 2026-07-16.

## Document text

GAS TRANSMISSION NORTHWEST LLC (PHMSA OPID 15014) reported 63.213261 active Natural Gas pipeline miles in Gilliam County, OR (county FIPS 41021) 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: `466a89e816923dfd258df93e348f2b8a304efa69c721b7b2b98e06cde6d2daaf`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-27T09:13:21.903Z
- Document slug: `npms-mileage-510808b91bd4ff8e1adc9738`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "41021",
  "stateFips": "41",
  "state": "OR",
  "county": "Gilliam County",
  "region": "Gilliam County, OR",
  "operator": {
    "id": "15014",
    "name": "GAS TRANSMISSION NORTHWEST LLC"
  },
  "commodity": "Natural Gas",
  "mileage": 63.21326136,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 9875,
    "rowSha256": "ce88b046b5ef0926cd46fae55d531acec89707583e50cb99240fe416d8d366bc"
  },
  "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": "GAS TRANSMISSION NORTHWEST LLC"
}
```