Des Moines, Iowa -- Increased inflow into the Saylorville Lake from its 5,823 square-mile watershed on the Des Moines River has caused pool levels to continue to rise. In response to the National Weather Service’s 24-hour forecast, rainfall occurring over the Des Moines River watershed, and subsequent increased inflow into Saylorville Lake, the U.S. Army Corps of Engineers continues to release its maximum outflow from its conduit.