# NORTHWEST NATURAL GAS CO — Marion County, OR

**Citation:** NPMS FIPS 41047 / OPID 13840  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

48.245172 active Natural Gas pipeline miles in Marion County, OR; public NPMS snapshot 2026-07-16.

## Document text

NORTHWEST NATURAL GAS CO (PHMSA OPID 13840) reported 48.245172 active Natural Gas pipeline miles in Marion County, OR (county FIPS 41047) 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: `c6d7c7edee6f867e5da26de7a3752b78ef5a414c2ea4c4abb31b4b75253da206`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-27T13:24:01.325Z
- Document slug: `npms-mileage-724d7fd9dfb1607813688234`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "41047",
  "stateFips": "41",
  "state": "OR",
  "county": "Marion County",
  "region": "Marion County, OR",
  "operator": {
    "id": "13840",
    "name": "NORTHWEST NATURAL GAS CO"
  },
  "commodity": "Natural Gas",
  "mileage": 48.24517231,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 9899,
    "rowSha256": "394bfc4636141114b7d540d7b5767efe7228d07ebee4b25ecaf5a80c495a3b51"
  },
  "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"
}
```