(Oct. 9, 2012) The Rock Island District, U.S. Army Corps of Engineers, is currently operating its three Iowa reservoirs for drought conditions. With significantly decreased inflows, Saylorville Lake at Des Moines, Iowa; Lake Red Rock at Knoxville, Iowa; and Coralville Lake at Iowa City, Iowa; continue to release water to provide water supply and water quality for communities and utility needs downstream of the reservoirs.