From the top of the U.S. Army Corps of Engineers' dam at Stennis Lock on the Tennessee-Tombigbee Waterway in Mississippi, Hon. Jo-Ellen Darcy, Assistant Secretary of the Army for Civil Works, asks lock operations manager Rickey Saucer about the lighting in the dam recreation area parking lot. Darcy and Kate Brandt, Federal Environmental Executive, White House Council of Environmental Quality, visited the Mobile District lock and dam Jan. 21 to learn about their energy and sustainability efforts with the U.S. Army Engineering and Support Center, Huntsville. Through the first-ever Energy Savings Performance Contract for a civil works project managed by Huntsville Center, Mobile District is retrofitting and replacing lighting at 46 locations along the 234-mile waterway, which will result in guaranteed savings of more than $172,700 in the first year alone.