From November 18-23, 2012, the Department of Interior will conduct the first High Flow Experiment under a multi-year High Flow Protocol announced earlier this year by Secretary Salazar. Under this Protocol, high flow releases are linked to sediment input and other resource conditions below Glen Canyon Dam.
Beginning on the evening of November 18th, releases from Glen Canyon Dam will begin ramping up to full power plant capacity (approximately 27,300 cfs). At midday on November 19th, bypass tubes at Glen Canyon Dam will be opened and releases will continue to increase up to full power plant and bypass capacity (approximately 42,300 cfs) by the evening of November 19th. Releases will be maintained at peak release for 24 hours and then begin ramping back down. Releases will return to normal operations in the evening of November 23rd. The entire experiment, including ramping is expected to last 5 days, with 24 hours at peak release. November releases from Glen Canyon Dam prior to and after the High Flow Experiment are expected to fluctuate between 7,000cfs and 9,000cfs. The elevation of Lake Powell is expected to decrease approximately 2 ½ feet during the 5-day experiment.
For additional information please visit the 2012 High Flow Experiment webpage.
I’m Anne Castle, Assistant Secretary of the Interior for Water and Science. As the Assistant Secretary for the past three years, I’ve had the privilege of overseeing the Bureau of Reclamation and the U.S. Geological Survey. I also serve as the chair of the Glen Canyon Dam Adaptive Management Work Group. The Adaptive Management Program for the Glen Canyon Dam was established in 1996.
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