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
Architecture of the oil tanker a mid-deck design overcomes this by eliminating the double-bottom compartments that are void with air. Since the density of seawater is greater than that of oil, water comes into the tanks instead of oil escaping out, and rather than spilling, oil is vented upwards into overflow tanks. If the "Exxon Valdez" had been a Mid-Deck ship, she would have spilled very little oil. A variation on the Mid-Deck Tanker is the Coulombi Egg Tanker, which was approved by IMO as an alternative to the double hull concept. The design consists of a series of centre and wing tanks that are