CLARKS HILL, S.C. -- An estimated 1,000+ people gathered at the U.S. Army Corps of Engineers J. Strom Thurmond Dam to witness a test of the 23 spillway gates, July 11, 2013. The test was part of the Corps' Dam Safety Program to ensure the spillway gates could be activated properly in the event of an emergency. USACE photo by Billy Birdwell.