# GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP — St. Clair County, MI

**Citation:** NPMS FIPS 26147 / OPID 6660  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

48.03446 active Natural Gas pipeline miles in St. Clair County, MI; public NPMS snapshot 2026-07-16.

## Document text

GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP (PHMSA OPID 6660) reported 48.03446 active Natural Gas pipeline miles in St. Clair County, MI (county FIPS 26147) 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: `0bb9465b5d8426b52c96982a4ddf51ad01be2425df62180f500dedc433a1bb1d`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-27T00:43:32.858Z
- Document slug: `npms-mileage-62bda23059b6192273ebb770`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "26147",
  "stateFips": "26",
  "state": "MI",
  "county": "St. Clair County",
  "region": "St. Clair County, MI",
  "operator": {
    "id": "6660",
    "name": "GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP"
  },
  "commodity": "Natural Gas",
  "mileage": 48.03446024,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 5896,
    "rowSha256": "eff0e6239672706cf7caf7cd0608eb69d7ee8da27560a4249c40517f119b5476"
  },
  "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": "GREAT LAKES GAS TRANSMISSION LIMITED PARTNERSHIP"
}
```