During the Great Flood of 1993, heavy rains throughout June and early July caused the Des Moines and Raccoon Rivers to rise above flood stage levels. The Des Moines Water Works was submerged by floodwaters during the early morning hours of July 11, 1993, leaving an estimated 250,000 people without running water for 12 days and without drinking water for 20 days. Des Moines suffered major flooding again in June 2008 with a major levee breach. The Des Moines river is controlled upstream by Saylorville Reservoir. In both 1993 and 2008, the flooding river overtopped the reservoir spillway.