HUNTINGTON BEACH, Calif.—The underwater pipeline that spilled thousands of gallons of oil off the coast of Huntington Beach may have been ruptured as long as a year ago and multiple ship anchors may have struck the line over that time, a U.S. Coast Guard official said Oct. 8. Capt. Jason Neubauer, the Coast Guard’s lead investigator, said the crack in the pipeline could have developed at any point over the past year and expanded over time, so it remains unclear when oil actually began leaking. Neubauer indicated that underwater video of the damaged pipeline shows “marine growth” around the 13-inch crack in the pipeline that was left exposed when its concrete casing was ripped away, likely by the strike of a ship’s anchor that hooked the line and dragged it 105 feet out of place. Investigators were analyzing the maturity of the vegetation to give them a clue as to when …