To Opponents of Keystone a simple question from an environmental point of view. Which is worse 1,000 barrels spilled in two hours on land or 1,000,000 barrels on the open ocean as happened with the Exxon Valdez? The Exxon Valdez oil spill occurred in Prince William Sound, Alaska, on March 24, 1989, when Exxon Valdez, an oil tanker bound for Long Beach, California struck Prince William Sound's Bligh Reef and spilled 260,000 to 750,000 barrels (41,000 to 119,000 m3) of crude oil. It is considered to be one of the most devastating human-caused environmental disasters. The Valdez spill was the largest ever in U.S. waters until the 2010 Deepwater Horizon oil spill, in terms of volume released. However, Prince William Sound's remote location, accessible only by helicopter, plane, and boat, made government and industry response efforts difficult and severely taxed existing plans for response. The region is a habitat for salmon, sea otters, seals and seabirds. The oil, originally extracted at the Prudhoe Bay oil field, eventually covered 1,300 miles (2,100 km) of coastline, and 11,000 square miles (28,000 km2) of ocean. Exxon Valdez oil spill - Wikipedia, the free encyclopedia So given that the Chinese have a vast need for oil and the only way to get is by tanker. What rationale is there in arguing against a potential of at most 10,000 barrels spilled over 50 years on land versus the reality that a million barrel tanker [like Exxon Valdez] each day traveling on dangerous ocean with wreck potentials at any time carries in one mile almost one million barrels while the Keystone pipeline in one mile carries 500 barrels. The 1 million barrel tanker carries in one mile 2,000 times the amount of oil a pipeline carries in one mile. Almost 26 times the amount of oil spilled by Valdez as compared to the 10,000 projected spills over 50 years in 1,700 miles of pipe carrying 500 barrels in one mile at one time. Between 1999 and 2008 Enbridge [nation's largest pipeline management company] recorded 610 spills that released 132,000 barrels of hydrocarbons into farms, wetlands and waterways on the continent. The Tyee – The Enbridge Dirty Dozen Please some one from the anti-Keystone peanut gallery explain how 610 spills over 10 years with an average spill of 210 barrels is WORSE then one spill at one time in the ocean of 256,000 OR potentially 1 million barrels from a oil tanker accident? Would you eco-friendly people explain that to me?