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Alcova Reservoir drawdown set to begin Oct. 1; water level to drop ~4 inches per day

Alcova Dam and Powerplant. (Bureau of Reclamation)

CASPER, Wyo. — The annual drawdown of the water level at Alcova Reservoir is set to begin Saturday, Oct. 1.

Water will be lowered at a rate of about 4 inches per day, according to the Bureau of Reclamation. In total, the water surface elevation in Alcova will be lowered about 10 feet. The normal water surface elevation winter operating range at Alcova is between 5,487 and 5,489 feet, according to the BOR.

“Water released in the drawdown of Alcova Reservoir will be restored downstream in Glendo Reservoir,” the announcement on Wednesday said. “Boat owners and recreationists should be aware of the declining level of Alcova Reservoir and take proper precautions.”

The annual drawdown is conducted as irrigation season comes to a close, the BOR noted.

“Alcova Dam is on the North Platte River about 35 miles southwest of Casper, Wyoming,” the release added. “The dam forms a reservoir from which water is diverted into Casper Canal for irrigation of lands in the Kendrick Project near Casper.

“Winter releases from Alcova Reservoir generally provide power generation and relocate storage water into Glendo Reservoir for delivery the following spring and summer. Alcova Power Plant is located just downstream of Alcova Dam and has two 20.7 megawatt generating units.”