# TRANSWESTERN PIPELINE COMPANY LLC — Navajo County, AZ

**Citation:** NPMS FIPS 04017 / OPID 19610  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

102.857741 active Natural Gas pipeline miles in Navajo County, AZ; public NPMS snapshot 2026-07-16.

## Document text

TRANSWESTERN PIPELINE COMPANY LLC (PHMSA OPID 19610) reported 102.857741 active Natural Gas pipeline miles in Navajo County, AZ (county FIPS 04017) 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: `e5ffd4081d8b8612cbb5febcdf2b459d179f80bf50803f1487dd366fd731426c`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-25T08:36:58.485Z
- Document slug: `npms-mileage-e0d4e9d35b8b1c56a2d681c8`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "04017",
  "stateFips": "04",
  "state": "AZ",
  "county": "Navajo County",
  "region": "Navajo County, AZ",
  "operator": {
    "id": "19610",
    "name": "TRANSWESTERN PIPELINE COMPANY LLC"
  },
  "commodity": "Natural Gas",
  "mileage": 102.85774053,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 301,
    "rowSha256": "a6fdb18b74fac53cf14a5e4d9c1b94d53da314a209aedfbdc49b86fd417e4b81"
  },
  "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": "TRANSWESTERN PIPELINE COMPANY LLC"
}
```