# NORTHWEST NATURAL GAS CO — Columbia County, OR

**Citation:** NPMS FIPS 41009 / OPID 13840  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

144.688146 active Natural Gas pipeline miles in Columbia County, OR; public NPMS snapshot 2026-07-16.

## Document text

NORTHWEST NATURAL GAS CO (PHMSA OPID 13840) reported 144.688146 active Natural Gas pipeline miles in Columbia County, OR (county FIPS 41009) 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: `4d90db0293948064c40adef4cfdc3a901df489c597501dfccb0cb98f834ca274`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-26T23:34:12.898Z
- Document slug: `npms-mileage-e9482946348ba3affcd9a24d`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "41009",
  "stateFips": "41",
  "state": "OR",
  "county": "Columbia County",
  "region": "Columbia County, OR",
  "operator": {
    "id": "13840",
    "name": "NORTHWEST NATURAL GAS CO"
  },
  "commodity": "Natural Gas",
  "mileage": 144.68814582,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 9863,
    "rowSha256": "e53a22b20f1b3a9ca063a2043f3307b837b7ed4f0ce990b81a6d843d687ba94a"
  },
  "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": "NORTHWEST NATURAL GAS CO"
}
```