IOWA CITY, IA -- Heavy rainfall over portions of north central Iowa on Monday has increased runoff into Coralville Reservoir from its 3,084 square-mile watershed. To manage pool levels and maintain flood storage capacity, the U.S. Army Corps of Engineers will gradually increase Coralville Lake outflows on the Iowa River from a current rate of 10,000 cubic feet per second (cfs) to 15,000 cfs today, and then increase the outflow to 18,000 cfs on July 3. This outflow will remain in effect until further notice.