# MARKWEST RANGER PIPELINE COMPANY, L.L.C. — Warning Letter

**Citation:** CPF 220035005W  
**Type / status:** enforcement / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2003-08-19

CLOSED warning letter citing 195.401(b), 195.412(a).

## Document text

Warning Letter involving MARKWEST RANGER PIPELINE COMPANY, L.L.C.. PHMSA's enforcement data identifies the cited regulations as 195.401(b),  195.412(a). The case was opened on 2003-08-19 and is reported as closed as of 2003-08-19. 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/220035005W>
- Source ID: `phmsa-enforcement`
- SHA-256: `4e1f803414198ecbbb3cf71299302300a5d17b68b3f3de68e9c974b65fa15dc0`
- Retrieved: 2026-08-20T04:44:44.458Z
- Exported: 2026-08-23T09:02:36.228Z
- Document slug: `phmsa-enforcement-220035005w`

### Source metadata

```json
{
  "cpf": "220035005W",
  "operator": "MARKWEST RANGER PIPELINE COMPANY, L.L.C.",
  "region": "Southern",
  "pipelineType": "INTERSTATE LIQUID ONSHORE",
  "caseStatus": "CLOSED",
  "citedSections": [
    "195.401(b)",
    "195.412(a)"
  ],
  "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": "MARKWEST RANGER PIPELINE COMPANY, L.L.C."
}
```