April 8, 2000
Troy Shiflett, left, and Barry Tignor of A&A Environmental, one of Pepco's cleanup contractors, land their boat at Chalk Point, Md. An April 7, 2000, oil spill along the Patuxent River, caused by a ruptured pipe at Pepco's Chalk Point power plant, was Maryland's worst environmental disaster. More than 120,000 gallons of oil fouled nearly 90 acres of shoreline and wetlands.
Marie Poirier Marzi for The Washington Post