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Water releases to reduce to winter levels

JSSP City News

The U.S. Army Corps of Engineers announced on Nov. 25 that water releases from the Jamestown and Pipestem dams will be reduced to expected winter levels by Dec. 4.

The Corps said updated river ice forecasts indicate ice formation is likely in the LaMoure area in early December. To mitigate the risk of freeze-up ice jams or other ice-related flooding, combined releases from the dams will be reduced by 200 cubic feet per second each day until the expected winter levels are reached. The target combined release rate is 650 cfs.

The Corps said it will operate to minimize the risk of ice-related flooding and adjustments to the releases will be made as needed.

According to the news release, the Jamestown Dam is currently at a pool elevation of 1,441.3 feet, 28% into the flood pool, and is dropping. The pool elevation peaked on Nov. 12 at 1,442.0 feet, which was 31% into the flood pool. Inflows are near 350 cfs, and releases are 1,100 cfs.

Pipestem Dam is currently at a pool elevation of 1,464.2 feet, 24% into the flood pool, and is dropping. The pool elevation peaked on Oct. 29 at 1,475.0 feet, which was 43% into the flood pool. Inflows are near 400 cfs, and releases are 1,100 cfs.

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