ANCHORAGE, Alaska (KTUU) – A multi-agency response is underway in the Cook Inlet after a pilot spotted an oil spill Monday afternoon.
The pilot, who asked to remain anonymous, reported the sighting to the Alaska Department of Environmental Conservation (ADEC) at approximately 2 p.m. while flying over the inlet. He told state environmental officials that he flies the route daily and that the spill was not visible less than 24 hours prior.
He told Alaska’s News Source that he estimates the spill to be about five miles long.
The spill is located approximately five miles south of Tyonek, according to the pilot’s report.
ADEC On-Scene Coordinator Anna Carey said multiple agencies have dispatched response teams to the area.
“We have multiple agencies responding, including the U.S. Coast Guard, Alaska Response Corp., and the State Department of Fish and Game,” Carey said.
ADEC officials said it remains unclear which rig or vessel originated the spill, but Hilcorp is currently sending resources to inspect its assets in the vicinity.
The Alaska Division of Oil and Gas’ Cook Inlet activity map, current as of June 2026, shows ongoing oil and natural gas exploration, development and production work across the region, including drilling and well-expansion projects.
This is a developing story. This story will be updated as additional information becomes available.
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