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Old 03-23-2015   #1
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Flagstaff, Arizona
Paddling Since: 1869
Join Date: Oct 2009
Posts: 119
Grand Canyon Colorado River Flows - April, May, and June

March 23, 2015

This notification confirms that the release volume from Glen Canyon Dam for April 2015 will be 600,000 acre-feet. Hourly and daily average releases from Glen Canyon Dam for April 2015 will be scheduled through Western Area Power Administration to be consistent with the Glen Canyon Dam Operating Criteria (Federal Register, Volume 62, No. 41, March 3, 1997) and to also achieve, as nearly as is practicable, this monthly volume.

Hourly releases during April 2015 are anticipated to fluctuate between approximately 7,500 cfs in the nighttime and approximately 13,000 cfs in the daytime.

We anticipate the release volume for May 2015 will be 700,000 acre-feet with fluctuations between approximately 8,500 cfs and 14,500 cfs. The anticipated release volume for June 2015 is 800,000 acre-feet with fluctuations between approximately 10,000 cfs and 18,000 cfs. This will be confirmed in a subsequent notification toward the end of April.

This notification supersedes all previously issued notifications and is current until a new notification is issued. All times identified in this notification are local time (Mountain Standard Time) and not hour ending.

If there are any concerns or questions regarding these operations, I can be reached at 801-524-3635. Your cooperation is greatly appreciated.

Kind regards,
Katrina A Grantz, PhD

Hydraulic Engineer, Glen Canyon Dam
Bureau of Reclamation
125 S. State St.
Salt Lake City, UT 84138

Ph: 801-524-3635

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