Exxon Valdez Diego, California. She was a relatively new tanker at the time of the spill, and was delivered to Exxon on December 16, 1986. At the time of the spill, "Exxon Valdez" was employed to transport crude oil from the Alyeska consortium's pipeline terminal in Valdez, Alaska, to the lower 48 states of the United States. At the time it ran aground, the vessel was carrying about 201,000 m³ (53.1 million gallons) of oil. After the spill, the vessel was towed to San Diego, arriving on June 10, 1989, and repairs were started on June 30, 1989. Approximately 1,600 tons of
Exxon Valdez oil spill effectively a bill of attainder, a regulation that was unfairly directed at Exxon alone. In 2002, the 9th Circuit Court of Appeals ruled against Exxon. As of 2002, OPA had prevented 18 ships from entering Prince William Sound. OPA also set a schedule for the gradual phase in of a double hull design, providing an additional layer between the oil tanks and the ocean. While a double hull would likely not have prevented the "Valdez" disaster, a Coast Guard study estimated that it would have cut the amount of oil spilled by 60 percent. The "Exxon Valdez" supertanker was towed