ANCHORAGE (AP) – Repair work is underway for a pipeline that has spewed hundreds of thousands of cubic feet of processed natural gas into Alaska’s Cook Inlet, home to endangered beluga whales and other marine mammals.

The 8-inch (20-centimeter) diameter pipeline supplies gas for power to four Hilcorp Alaska, LLC production platforms. A spokeswoman said Monday that divers over the weekend discovered a 2-inch (5-centimeter) hole at bottom of the pipeline where it rests on a boulder in the sea floor.

“Divers have identified the leak location, and are working to prepare the site to allow for the i...