Map of the Pegasus pipeline, which runs 850 miles from Patoka, Ill. to Nederland, Texas. The section of the pipe involved in the spill in Arkansas was built in the 1940s. The line originally flowed north, from Texas to Illinois.
In 2006, it was reversed to carry Canadian tar sands crude to Gulf Coast refineries. In 2009, Exxon increased the line's capacity by 50 percent to more than 90,000 barrels a day by reactivating and enhancing pumping stations to push more dilbit through the 20-inch line.
Source: Rextag Strategies