# NORTHWESTERN ENERGY - A DIVISION OF NORTHWESTERN COPORATION — Gas distribution annual report (2005)

**Citation:** PHMSA Annual Report 20050566 (2005)  
**Type / status:** inspection / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2005-12-31

Gas distribution; reporting year 2005; MT. Operator-reported infrastructure data.

## Document text

Gas distribution annual report for reporting year 2005, submitted by NORTHWESTERN ENERGY - A DIVISION OF NORTHWESTERN COPORATION (operator 31632). Reported scope: MT. Represented states: MT. The sortable date is the reporting-period end, not the operator submission date.

## Provenance

- Official: Yes
- Source: <https://data.transportation.gov/d/aemm-7pyq>
- Source ID: `phmsa-annual-reports`
- SHA-256: `db48991b7cf1f24d1554164bf58a56a85d356f5dc200e7a36c548e4a37b73229`
- Retrieved: 2026-08-13T02:59:50.318Z
- Exported: 2026-08-24T00:24:55.337Z
- Document slug: `phmsa-annual-91c58a1a218dd8e412abd277`

### Source metadata

```json
{
  "materialSubtype": "phmsa_pipeline_annual_report",
  "dataset": "gas_distribution",
  "reportYear": 2005,
  "reportNumber": "20050566",
  "supplementalNumber": "2724",
  "sourceFormat": "modern_xlsx",
  "operator": {
    "id": "31632",
    "name": "NORTHWESTERN ENERGY - A DIVISION OF NORTHWESTERN COPORATION"
  },
  "region": "MT",
  "commodity": null,
  "representedStates": [
    "MT"
  ],
  "jurisdictionClasses": [],
  "facilities": [],
  "metrics": {},
  "dependentRowsBySheet": {},
  "dataAsOf": null,
  "reportingPeriodEnd": "2005-12-31",
  "dateBasis": "calendar_year_end_not_submission_date",
  "provenance": {
    "archive": "annual_gas_distribution_2004_2009.zip",
    "archiveSha256": "e7df2fd3d0a343bb62534a72a56da5199b50f992fe4d6781ee5f939ec80bc449",
    "workbook": "annual_gas_distribution_2005.xlsx",
    "sheet": "GD AR 2005",
    "rowNumber": 56,
    "sourceRowNumbers": [
      56
    ],
    "rowSha256": "dd31c73137f7e6143c0613a8aef454041300685b673b1687ea787863376cf6e5"
  },
  "caveat": "Operator-reported annual infrastructure data may be corrected. The indexed date is the reporting-period end, not the submission date, and the record is not an agency finding about current facility condition.",
  "jurisdiction": "US",
  "operatorName": "NORTHWESTERN ENERGY - A DIVISION OF NORTHWESTERN COPORATION"
}
```