# MARKWEST RANGER PIPELINE COMPANY, L.L.C. — Corrective Action Order

**Citation:** CPF 220045017H  
**Type / status:** enforcement / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2004-11-18

CLOSED corrective action order.

## Document text

Corrective Action Order involving MARKWEST RANGER PIPELINE COMPANY, L.L.C.. The dataset does not identify a cited regulation for this case. The case was opened on 2004-11-18 and is reported as closed as of 2010-10-04. Open the official case record for notices, responses, orders, and the latest status.

Official case documents:

220045017H_Closure Letter_10042010.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220045017H/220045017H_Closure%20Letter_10042010.pdf

220045017H_Closure Letter_10042010_text.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220045017H/220045017H_Closure%20Letter_10042010_text.pdf

CPF2_2004_5017H_AmendCAO.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF2_2004_5017H_AmendCAO.pdf

CPF2_2004_5017H_CAO.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF2_2004_5017H_CAO.pdf

CPF_2_2004_5017H_Amended_CAO_for_MarkWest.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF_2_2004_5017H_Amended_CAO_for_MarkWest.pdf

220045017H_Closure Letter_10042010_text.pdf

1
CERTIFIED MAIL - RETURN RECEIPT REQUESTED
October 4, 2010
Mr. John Mollenkopf
Senior Vice President, Chief Operations Officer
MarkWest Energy Appalachia, LLC
1515 Arapahoe St., Tower 2, Suite 700
Denver, CO 80202
CPF 2-2004-5017H
Dear Mr. Mollenkopf:
As a result of a pipeline failure on the MarkWest Hydrocarbon, Inc. (MarkWest) Maytown to
Ranger pipeline in Floyd County, Kentucky on November 8, 2004, and pursuant to Section
60112 of Title 49, United States Code, the Pipeline and Hazardous Materials Safety
Administration (PHMSA) issued a Corrective Action Order (CAO) on November 18, 2004, to
MarkWest. The CAO was amended on November 19, 2004, and on March 21, 2005. The CAO
required MarkWest to take certain corrective actions to protect the public and the environment.
Subsequent to the issuance of the CAO and amendments MarkWest Hydrocarbon, Inc. changed
its name to MarkWest Energy Appalachia, LLC.
This letter is to inform you that MarkWest has complied with the terms of the CAO. No further
action is necessary with regards to the CAO and this case is now closed.
Please be advised that there is at least one other PHMSA case pending with regards to the above
referenced pipeline failure and that this letter refers only to the CAO (re: CPF 2-2004-5017H)
and not to any other PHMSA pending cases.
Sincerely,
Wayne T. Lemoi
Director, PHMSA Southern Region
Office of Pipeline Safety
cc: Martin Fritz, President, EQT Midstream, 625 Liberty Av., Suite 1700, Pittsburgh, PA 15222

## Provenance

- Official: Yes
- Source: <https://primis.phmsa.dot.gov/enforcement-data/case/220045017H>
- Source ID: `phmsa-enforcement`
- SHA-256: `ad205d63ac6b4b2c4e4f7838c64b8ffc1d526b397835468de08aa340f598635b`
- Retrieved: 2026-08-20T04:44:44.458Z
- Exported: 2026-08-22T18:54:27.916Z
- Document slug: `phmsa-enforcement-220045017h`

### Source metadata

```json
{
  "cpf": "220045017H",
  "operator": "MARKWEST RANGER PIPELINE COMPANY, L.L.C.",
  "region": "Southern",
  "pipelineType": "INTERSTATE LIQUID ONSHORE",
  "caseStatus": "CLOSED",
  "citedSections": [],
  "dataAsOf": "08/04/2026 12PM",
  "caseDataAsOf": "2026-08-04",
  "attachmentCount": 5,
  "attachments": [
    {
      "name": "220045017H_Closure Letter_10042010.pdf",
      "url": "https://primis.phmsa.dot.gov/enforcement-documents/220045017H/220045017H_Closure%20Letter_10042010.pdf",
      "bytes": 28068,
      "category": "agency_document"
    },
    {
      "name": "220045017H_Closure Letter_10042010_text.pdf",
      "url": "https://primis.phmsa.dot.gov/enforcement-documents/220045017H/220045017H_Closure%20Letter_10042010_text.pdf",
      "bytes": 11666,
      "category": "agency_document"
    },
    {
      "name": "CPF2_2004_5017H_AmendCAO.pdf",
      "url": "https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF2_2004_5017H_AmendCAO.pdf",
      "bytes": 61273,
      "category": "case_document"
    },
    {
      "name": "CPF2_2004_5017H_CAO.pdf",
      "url": "https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF2_2004_5017H_CAO.pdf",
      "bytes": 87391,
      "category": "case_document"
    },
    {
      "name": "CPF_2_2004_5017H_Amended_CAO_for_MarkWest.pdf",
      "url": "https://primis.phmsa.dot.gov/enforcement-documents/220045017H/CPF_2_2004_5017H_Amended_CAO_for_MarkWest.pdf",
      "bytes": 89556,
      "category": "case_document"
    }
  ],
  "extractedAgencyDocumentCount": 1,
  "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."
}
```