The corps said releases at the dam near Yankton, South Dakota were lowered from 160,000 cubic feet per second to 155,000. It's scheduled to be lowered again on Monday to 150,000 cfs.
The releases are scheduled to hold at that level until mid-August, then gradually be cut each day to reach the target of 90,000 cfs by month's end and 40,000 cfs by October 1st.
The corps has been releasing massive amounts of water from the dams along the river to deal with heavy spring rains and above-average mountain snowpack. The releases have caused record flooding in Nebraska and Iowa.
