# COWBOY MIDSTREAM LLC — Natrona County, WY

**Citation:** NPMS FIPS 56025 / OPID 40155  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

16.393097 active Crude Oil pipeline miles in Natrona County, WY; public NPMS snapshot 2026-07-16.

## Document text

COWBOY MIDSTREAM LLC (PHMSA OPID 40155) reported 16.393097 active Crude Oil pipeline miles in Natrona County, WY (county FIPS 56025) 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: `e12a34d70beb61981f9412251993e71571e3173e02391bbb9245671e765bd359`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-26T12:43:52.212Z
- Document slug: `npms-mileage-fbd7c04a9405712d8edbd397`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "56025",
  "stateFips": "56",
  "state": "WY",
  "county": "Natrona County",
  "region": "Natrona County, WY",
  "operator": {
    "id": "40155",
    "name": "COWBOY MIDSTREAM LLC"
  },
  "commodity": "Crude Oil",
  "mileage": 16.39309659,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 15425,
    "rowSha256": "1e2e1db835610d910796ce5c24eba99a273add1974bfe3086746d216959d12ed"
  },
  "citedSections": [
    "195.61"
  ],
  "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": "COWBOY MIDSTREAM LLC"
}
```