USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Hilcorp Gas Leak - Cook Inlet, Alaska

Friday, April 7, 2017

April 7, 2017

PHMSA is investigating the potential gas leak from a pipeline on Hilcorp's Steelhead Platform in the Cook Inlet. The line has been shut down.

April 6, 2017

PHMSA has issued a Corrective Action Order to Hilcorp Alaska that requires the operator to take specific actions to minimize hazards associated with the release of crude oil from an 8-inch hazardous liquid pipeline in the Cook Inlet. The CAO states that Hilcorp may not operate the affected segment of pipeline without PHMSA's approval and requires the operator to perform a hydrostatic pressure test, direct visual inspection, and a review of recent in-line inspection results. The investigation is ongoing.

March 17, 2017

The Pipeline and Hazardous Materials Safety Administration has issued a second Notice of Proposed Safety Order (NOPSO) to Hilcorp Alaska that would require the operator conduct an external inspection to assess the safety of continued operations of a crude oil pipeline ("B pipeline") in the Cook Inlet which is similar to and situated near the gas pipeline ("A pipeline") that was reported as leaking on February 7, 2017. If the operator is unable to inspect the line within 21 days of the issuance of a Final Safety Order - or continued operation is deemed unsafe - Hilcorp would be required to be shut down and purge the line in accordance with an approved purging plan. Our investigation and continued consultations with other Federal and State agencies is ongoing.

March 8, 2017

The Pipeline and Hazardous Materials Safety Administration (PHMSA) the lead federal regulatory agency for pipeline safety and integrity is investigating a gas leak on Hilcorp's Gas System in Cook Inlet, Alaska. During the course of the investigation, PHMSA is consulting with several Federal/State agencies in Alaska and Hilcorp to evaluate the risk to public safety, the environment, and marine life.

As a result of these consultations on March 3, 2017, PHMSA issued a Notice of Proposed Safety Order to Hilcorp Alaska that requires the operator to permanently repair or shut down the affected pipeline by May 1 and make improvements to improve the integrity of the line. If PHMSA receives any new information regarding this leak, we will take appropriate additional action.

February 15, 2017

PHMSA personnel are investigating and actively monitoring a natural gas leak on an eight-inch line that provides fuel gas to platforms in the Cook Inlet. PHMSA is in the process of collecting information to inform our approach moving forward. Access to the site of the leak has thus far been impeded by ice in the inlet.