Drill rig helper nserts environmentally-safe dye into drill casing
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 Hill Lake March 14, 2012.

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Tags: usace
Photo by: Lee Robers |  VIRIN: 120314-A-CE999-005.JPG