In this Thursday, Oct 7, 2021 file photo, Workers in protective suits clean the contaminated beach in Corona Del Mar after an oil spill in Newport Beach, Calif. California's uneasy relationship with the oil industry is being tested again by the latest spill to foul beaches and kill birds and fish off Orange County. AP FILE PHOTO
BIG BEAR: Investigators believe a 1,200-foot (366-meter) cargo ship dragging anchor in rough seas caught an underwater oil pipeline and pulled it across the seafloor, months before a leak from the line fouled the Southern California coastline with crude.