Reclamation Announces Guernsey Reservoir Silt Run

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MILLS, Wyo. -- The Bureau of Reclamation's Wyoming Area Office will be lowering the water level in Guernsey Reservoir in preparation for the annual silt run. According to Coleman W. Smith, Wyoming Area Manager, the silt run is an operation which provides silt-laden water to Goshen, Gering-Fort Laramie, and Pathfinder Irrigation Districts under contract with Reclamation.

On July 6, the release of water from Glendo Reservoir will be decreased from approximately 5,000 cubic feet per second (cfs) to a flow of approximately 2,000 cfs.

"The decreased flow will cause a rapid decline of the Guernsey Reservoir level of approximately 25 feet during the period of July 7 through July 10," Smith said.

On Monday, July 7, the boat ramps on Guernsey Reservoir will be unusable due to the low reservoir level. From July 11 through July 24, water released from Glendo Reservoir will flow through Guernsey Reservoir, providing silt from Guernsey Reservoir into the canals of downstream irrigators. Beginning on July 24, the release of water from Glendo Reservoir will be rapidly increased to refill Guernsey Reservoir to a level suitable for recreation by the evening of July 30.

Boaters, recreationists, and irrigators should take proper precautions regarding changing river flows between Glendo and Guernsey Reservoirs and the rapid lowering and refilling of Guernsey Reservoir.

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Reclamation is the largest wholesale water supplier and the second largest producer of hydroelectric power in the United States, with operations and facilities in the 17 Western States. Its facilities also provide substantial flood control, recreation, and fish and wildlife benefits. Visit our website at

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