Gavins Point Dam

Water runs through the spillway at Gavins Point Dam in South Dakota.

Near-record runoff in the upper basin of the Missouri River last month means that releases from Gavins Point Dam will remain higher than usual into the foreseeable future.

The U.S. Army Corps of Engineers on Monday reported that last month’s runoff was the third-highest April amount in 121 years of records. A total of 7.8 million acre-feet of water, which is almost three times normal, poured into the upstream reservoirs.

The combined March and April runoff, at 18.7 million acre-feet, was the highest for those two months since record-keeping began in 1898. The previous record for the two months was set in 1952.