Reclamation notifies public of changing water levels at Glendo and Guernsey Reservoirs due to end-of-season drawdown

Media Contact: Shane Hayden, 307-261-5647,

For Release: September 03, 2019

MILLS, Wyoming -- The Wyoming Area Office of the Bureau of Reclamation in Mills, Wyoming, will be lowering the water level in Guernsey Reservoir as the 2019 irrigation season draws to a close.

Guernsey Reservoir levels are expected to remain at the normal summer reservoir level through September 8. Reclamation will begin drawing down Guernsey Reservoir on the morning of Monday, September 9. It is anticipated that the reservoir will drop 12 feet to reach elevation 4400.00 feet by September 17. After September 17, the drawdown of Guernsey reservoir will vary based on timing and downstream demand. Users should be aware of declining water levels.

Glendo Reservoir levels are expected to continue gradually declining and reach a water surface elevation near 4597.30 feet (approximately 165,000 acre-feet) around September 30.

The planned reservoir elevations may change in response to changing water demands.

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

For more information on water levels at Guernsey or Glendo Reservoir, contact Shane Hayden at 307-261-5647 or

# # #

The Bureau of Reclamation is a federal agency under the U.S. Department of the Interior and is the nation's largest wholesale water supplier and second largest producer of hydroelectric power. Our facilities also provide substantial flood control, recreation opportunities, and environmental benefits. Visit our website at and follow us on Twitter @USBR.

Relevant Link:

Wyoming Area Office