The Wyoming Area Office of the Bureau of Reclamation in Mills, Wyo., will be lowering the water level in Guernsey Reservoir in preparation for the annual silt run.
On the evening of July 4th, the release of water from Glendo Reservoir will be decreased from approximately 5,000 cubic feet per second (cfs) to a flow of approximately 3,000 cfs. The decreased flow will cause a rapid decline of the Guernsey Reservoir level of approximately 25 feet starting the morning of July 5th through July 10th. By Saturday, July 8th, the boat ramps at Guernsey Reservoir will no longer be useable due to the low reservoir level.
Water being released from Glendo Reservoir will flow through Guernsey Reservoir flushing silt from Guernsey Reservoir into the canals of downstream irrigators. The silt run will begin on July 11th and is anticipated to continue through July 25th. Beginning on July 25th, the release of water from Glendo Reservoir will be rapidly increased to refill Guernsey Reservoir. The level of Guernsey Reservoir is expected to be suitable for boating again by the evening of July 28th. However, the reservoir will continue to rise by several feet through the weekend and reach the normal reservoir operation level on Sunday the 30th.
Boaters, recreationists, and irrigators should take proper precautions regarding changing river flows below Glendo and Guernsey Reservoirs and the rapid lowering and refilling of Guernsey Reservoir.