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Gavins Point Dam

Water flows through Gavins Point Dam near Yankton, S.D., in 2011. The forecast for runoff into the Missouri River above Sioux City has been increased to be 136 percent of normal in 2018, the U.S. Army Corps of Engineers said. Releases from the dam are expected to increase to 44,000 cubic feet per second, and possibly higher, later this month.

OMAHA | The reduction of water releases from Gavins Point Dam near Yankton, South Dakota, began on Monday.

The U.S. Army Corps of Engineers has determined that because of above-normal runoff during the late summer and fall, winter releases will be 21,500 cubic feet per second to leave the Missouri River reservoir system at full flood control capacity in the spring. Normal winter releases range between 12,000 cfs and 17,000 cfs.

The average daily release during November was 29,100 cfs.

Runoff into the Missouri River basin above Sioux City was 1.2 million acre-feet during November, 110 percent of average. Runoff in 2017 is forecast at 29.4 MAF, 116 percent of the average of 25.3 MAF.

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