# WOLVERINE PIPELINE CO — Warning Letter **Citation:** CPF 220145005W **Type / status:** enforcement / historical **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2014-10-15 CLOSED warning letter citing 195.428(a). ## Document text Warning Letter involving WOLVERINE PIPELINE CO. PHMSA's enforcement data identifies the cited regulation as 195.428(a). The case was opened on 2014-10-15 and is reported as closed as of 2014-10-15. Open the official case record for notices, responses, orders, and the latest status. Official case documents: 220145005W_Operator Response_03202015.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_Operator%20Response_03202015.pdf 220145005W_warning letter_10152014.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_warning%20letter_10152014.pdf 220145005W_warning letter_10152014_text.pdf: https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_warning%20letter_10152014_text.pdf 220145005W_warning letter_10152014_text.pdf WARNING LETTER CERTIFIED MAIL - RETURN RECEIPT REQUESTED October 15, 2014 Mr. Marius Green Vice President & Operations Manager Wolverine Pipeline Company 8075 Creekside Drive, Suite 210 Portage, Michigan 49024 CPF 2-2014-5005W Dear Mr. Green: From April 28, 2014, through September 12, 2014, representatives of the Pipeline and Hazardous Materials Safety Administration (PHMSA), Southern Region, Office of Pipeline Safety inspected the Wolverine Pipeline Company (Wolverine) operations and maintenance program at Portage, Michigan, pursuant to Chapter 601 of 49 United States Code. As a result of the inspection, it appears that Wolverine has committed a probable violation of the Pipeline Safety Regulations, Title 49, Code of Federal Regulations. The item inspected and the probable violation is as follows: 1. §195.428 Overpressure safety devices and overfill protection systems. (a)Except as provided in paragraph (b) of this section, each operator shall, at intervals not exceeding 15 months, but at least once each calendar year, or in the case of pipelines used to carry highly volatile liquids, at intervals not to exceed 7 ½ months, but at least twice each calendar year, inspect and test each pressure limiting device, relief valve, pressure regulator, or other item of pressure control equipment to determine that it is functioning properly, is in good mechanical condition, and is adequate from the standpoint of capacity and reliability of operation for the service in which it is used. Wolverine did not, at intervals not exceeding 15 months, but at least once each calendar year, inspect and test each pressure limiting device, relief valve, pressure regulator, or other item of pressure control equipment to determine that it was adequate from the standpoint of capacity and reliability of operation for the service in which it was used. Wolverine operates and maintains approximately 629 miles of pipeline along with five breakout tanks at Stockbridge, Michigan.1 The Wolverine Operations Control Center located in Portage, Michigan, monitors the overpressure protection for the pipeline system consisting of 15 relief valves and the overfill protection system for each breakout tank. Wolverine field technicians provided records to document the annual inspection and testing of the 15 relief valves. However, the technicians did not present records to document that Wolverine had determined its 15 relief valves were adequate from the standpoint of capacity and reliability of operation for the service in which they were used in calendar years 2012 and 2013. Under 49 United States Code, § 60122, Wolverine is subject to a civil penalty not to exceed $200,000 per violation per day the violation persists up to a maximum of $2,000,000 for a related series of violations. For violations occurring prior to January 4, 2012, the maximum penalty may not exceed $100,000 per violation per day, with a maximum penalty not to exceed $1,000,000 for a related series of violations. We have reviewed the circumstances and supporting documents involved in this case, and have decided not to conduct additional enforcement action or penalty assessment proceedings at this time. We advise you to correct the items identified in this letter. Failure to do so will result in Wolverine being subject to additional enforcement action. No reply to this letter is required. If you choose to reply, in your correspondence please refer to CPF 2-2014-5005W. Be advised that all material you submit in response to this enforcement action is subject to being made publicly available. If you believe that any portion of your responsive material qualifies for confidential treatment under 5 U.S.C. 552(b), along with the complete original document you must provide a second copy of the document with the portions you believe qualify for confidential treatment redacted and an explanation of why you believe the redacted information qualifies for confidential treatment under 5 U.S.C. 552(b). Sincerely, Wayne T. Lemoi Director, Office of Pipeline Safety PHMSA Southern Region 1 While operated by Wolverine, one of the five breakout tanks was actually maintained by Marathon.2 ## Provenance - Official: Yes - Source: - Source ID: `phmsa-enforcement` - SHA-256: `c8e94728c8cc5b991bcbe0ad6f59212073b0d42972e0cfd5f4e086eb26252bd3` - Retrieved: 2026-08-20T04:44:44.458Z - Exported: 2026-08-22T23:11:01.446Z - Document slug: `phmsa-enforcement-220145005w` ### Source metadata ```json { "cpf": "220145005W", "operator": "WOLVERINE PIPELINE CO", "region": "Southern", "pipelineType": "INTERSTATE LIQUID ONSHORE", "caseStatus": "CLOSED", "citedSections": [ "195.428(a)" ], "dataAsOf": "08/04/2026 12PM", "caseDataAsOf": "2026-08-04", "attachmentCount": 3, "attachments": [ { "name": "220145005W_Operator Response_03202015.pdf", "url": "https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_Operator%20Response_03202015.pdf", "bytes": 290375, "category": "party_submission" }, { "name": "220145005W_warning letter_10152014.pdf", "url": "https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_warning%20letter_10152014.pdf", "bytes": 1435712, "category": "agency_document" }, { "name": "220145005W_warning letter_10152014_text.pdf", "url": "https://primis.phmsa.dot.gov/enforcement-documents/220145005W/220145005W_warning%20letter_10152014_text.pdf", "bytes": 9051, "category": "agency_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": "WOLVERINE PIPELINE CO" } ```