Thanks for the link. The Colonial Pipeline is critical to keeping the East Coast supplied with refined products such as diesel and gasoline. It was shut down for a while after Katrina, causing a shortage of gasoline on the East Coast.
This is a map of where it goes

Oil, gas prices fall to April levels after Gustav weakens
The Washington Times
Wednesday, September 3, 2008

"The Colonial pipeline, the main conduit bringing fuel into the Washington area, was operating at reduced capacity due to power outages and shutdowns at pumping stations in central Louisiana. Because of ample supplies at most gas stations, however, the cutbacks had not caused an increase in pump prices."

http://washingtontimes.com/news/2008/sep/03/oil-gas-prices-fall-to-april...