# NORTHERN BORDER PIPELINE COMPANY — Warning Letter

**Citation:** CPF 520050007  
**Type / status:** enforcement / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2005-03-08

CLOSED warning letter citing 192.707(b)(4), 192.739(d).

## Document text

Warning Letter involving NORTHERN BORDER PIPELINE COMPANY. PHMSA's enforcement data identifies the cited regulations as 192,  192.707(b)(4),  192.739(d). The case was opened on 2005-03-08 and is reported as closed as of 2005-03-08. Open the official case record for notices, responses, orders, and the latest status.

PHMSA lists no public case documents for this record.

## Provenance

- Official: Yes
- Source: <https://primis.phmsa.dot.gov/enforcement-data/case/520050007>
- Source ID: `phmsa-enforcement`
- SHA-256: `7f2f716f4e6563340ca088424eb57171f2964fb13f607646e66a700fac72dd19`
- Retrieved: 2026-08-20T04:44:44.458Z
- Exported: 2026-08-24T02:51:35.988Z
- Document slug: `phmsa-enforcement-520050007`

### Source metadata

```json
{
  "cpf": "520050007",
  "operator": "NORTHERN BORDER PIPELINE COMPANY",
  "region": "Western",
  "pipelineType": "GAS INTRASTATE ONSHORE",
  "caseStatus": "CLOSED",
  "citedSections": [
    "192.707(b)(4)",
    "192.739(d)"
  ],
  "dataAsOf": "08/04/2026 12PM",
  "caseDataAsOf": "2026-08-04",
  "attachmentCount": 0,
  "attachments": [],
  "extractedAgencyDocumentCount": 0,
  "attachmentPolicy": "Official attachment links are retained. Agency-issued documents may also include a verified local PDF and page-level text representation.",
  "jurisdiction": "US",
  "operatorName": "NORTHERN BORDER PIPELINE COMPANY"
}
```