Based on industry studies and ExxonMobil's own records for the Pegasus pipeline, the oil company knew or should have known the following six facts that help explain what went wrong in this year's oil spill in the North Woods neighborhood of Mayflower, Ark., a town of 2,300 people located about 20 miles northeast of Little Rock.
(NOTE: This slideshow is part of an article by Elizabeth Douglass, Exxon Knew Pipeline Was Old, Defective, and Brittle, and Still Added New Stresses. The article found that since at least 2006, ExxonMobil has known that its 1940s-era Pegasus pipeline had many manufacturing defects, and that the seams of the pipe have been identified by the industry as being especially brittle. Despite those risks, Exxon added new stresses to the line by using it to carry heavy oil from Canada, reversing the direction of the flow and increasing the amount of oil that surged through it.)
Credit: The Duncan Firm