Unified Command stands down its response to Anna Platform incident

Nikiski, Alaska – The Unified Command comprised of the United States Coast Guard (USCG), Alaska Department of Environmental Conservation (ADEC), and Hilcorp Alaska (Hilcorp) responding to a reported sheen in Cook Inlet stood down after a final overflight this morning confirmed no sheening.

Hilcorp crews successfully and safely evacuated all crude oil from the suspected leaking pipeline by displacing it with filtered seawater. The pipeline is an oil gathering line connecting the Anna and Bruce platforms. Cook Inlet Spill Prevention and Response (CISPRI) remained on scene and USCG and ADEC observers were on board the Anna platform for the purging operation.

Overflights were conducted at 7 p.m. Sunday evening and at 7:50 a.m. this morning. No sheen was observed. The Perseverance, a CISPRI vessel, remained on standby through the evening and will do a final survey of the area later today.

A diving crew is assembling in the region accompanied by appropriate support vessels. Use of divers to investigate and perform any necessary repairs will be initiated as soon as it is safe to do so.

The exact cause of the release is unknown and remains under investigation.

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