# SEMCO ENERGY GAS COMPANY — Marquette County, MI

**Citation:** NPMS FIPS 26103 / OPID 18472  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

44.948831 active Natural Gas pipeline miles in Marquette County, MI; public NPMS snapshot 2026-07-16.

## Document text

SEMCO ENERGY GAS COMPANY (PHMSA OPID 18472) reported 44.948831 active Natural Gas pipeline miles in Marquette County, MI (county FIPS 26103) 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: `2ebffd2fc9f876822b2bdab485206fbecdf6c4d55642b21a7f826410c78947e4`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-25T12:08:36.050Z
- Document slug: `npms-mileage-ee86823b3fa3cd15f20b0a90`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "26103",
  "stateFips": "26",
  "state": "MI",
  "county": "Marquette County",
  "region": "Marquette County, MI",
  "operator": {
    "id": "18472",
    "name": "SEMCO ENERGY GAS COMPANY"
  },
  "commodity": "Natural Gas",
  "mileage": 44.94883143,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 5779,
    "rowSha256": "17fbcb2611cd6412a17fb5b902888e7cae3941b1135484015e83462e6ad0612c"
  },
  "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": "SEMCO ENERGY GAS COMPANY"
}
```