Drill Rig Operator John Blackson, U.S. Army Corps of
Drill Rig Operator John Blackson, U.S. Army Corps of Engineers Baltimore District, works on a rig near the Saddle Dam at Center Hill Lake in Silver Point, Tenn., March 14, 2012. The Baltimore District is suppor... More
The Baltimore District drill crew inserts
The Baltimore District drill crew inserts environmentally-safe green-yellow dye into the drill casing to test seepage paths downstream of the Saddle Dam at Center Hill Lake March 14, 2012.
Drill rig operator John Blackson (right) and helper
Drill rig operator John Blackson (right) and helper Steve Seager, U.S. Army Corps of Engineers Baltimore District, drill a hole several hundred feet deep just downstream of the Saddle Dam to retrieve a needed c... More
Geologist Sarah Mackey, U.S. Army Corps of Engineers
Geologist Sarah Mackey, U.S. Army Corps of Engineers Nashville District, is works alongside the Baltimore District Drill Rig, March 14, 2012, and collects and analyzes core samples.
Steve Seager, U.S. Army Corps of Engineers Baltimore
Steve Seager, U.S. Army Corps of Engineers Baltimore District drill rig helper, inserts environmentally safe green-yellow dye into the drill casing to test seepage paths downstream of the Saddle Dam at Center H... More
Drill rig operator John Blackson, U.S. Army Corps of
Drill rig operator John Blackson, U.S. Army Corps of Engineers Baltimore District, conducts drilling operations near the Nashville District's Saddle Dam at Center Hill Lake March 14, 2012.
Project manager Linda Adcock (Left) and geologist Sarah
Project manager Linda Adcock (Left) and geologist Sarah Mackey, U.S. Army Corps of Engineers Nashville District, mark a location where environmentally-safe green-yellow dye has exited from a rock formation indi... More
Drill rig operator John Blackson, U.S. Army Corps of
Drill rig operator John Blackson, U.S. Army Corps of Engineers Baltimore District, conducts drilling operations near the Nashville District's Saddle Dam at Center Hill Lake March 14, 2012.