Grand Canyon High Flow "Probably" Coming in November! - Page 2 - Mountain Buzz
 



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Old 10-17-2016   #11
 
Edwards, Colorado
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Anyone hear anything since the 5th? If the release is on the 14th we won't see it but if it happens on the 7th it will catch us right before Lava. Just a bit curious.

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Old 10-17-2016   #12
 
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We will have further information for you very soon, about the meeting they had.
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Old 10-17-2016   #13
 
Edwards, Colorado
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Great! Thanks.
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Old 10-17-2016   #14
 
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The short update is that there are still a few issues that have to be worked out, but that it is still expected to happen and to start November 7.
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Old 10-17-2016   #15
 
Laramie, Wyoming
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To whoever drew the Nov. 8th cancellation last Friday, wanna be friends?
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Old 10-18-2016   #16
 
Edwards, Colorado
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Quote:
Originally Posted by GCPBA View Post
The short update is that there are still a few issues that have to be worked out, but that it is still expected to happen and to start November 7.
Thanks! Looks like it won't catch up to us until Havasu.
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Old 10-18-2016   #17
 
Louisville, Colorado
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The hydrograph at Phantom from Nov. 2014 event.

USGS Current Conditions for USGS 09402500 COLORADO RIVER NEAR GRAND CANYON, AZ


We are likely to be above Phantom.
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Old 10-19-2016   #18
 
Edwards, Colorado
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From 2013

http://www.usbr.gov/uc/rm/gcdHFE/201...RoutingMap.pdf
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Old 10-25-2016   #19
 
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Good news for you lucky boaters who will be in Grand Canyon November 7-12! Here is a high flow update from the Glen Canyon Dam people, dated October 24.

At this time we anticipate that a fall HFE is highly probable. This HFE will be the fourth conducted under the Protocol. If an HFE is to occur, the timing will begin on the morning of November 7th at 6:00 AM, releases from Glen Canyon Dam will be increased up to full power plant capacity (approximately 21,000 cfs). At 9:00 AM on November 7th, bypass tubes at Glen Canyon Dam will be opened, one every hour, and releases will continue to increase up to full power plant and bypass capacity (approximately 36,000 cfs) by midday on November 7th. Releases will be maintained at peak release for 4 days (96 hours) and then begin ramping back down. Releases will return to normal operations in the early morning hours of November 12th.

The entire experiment, including ramping is expected to last nearly 5 full days.

November releases from Glen Canyon Dam prior to and after the HFE are expected to fluctuate between 6,500 cfs and 9,000 cfs. The total release in November, including the HFE, is anticipated to be approximately 744 kaf. The annual release volume from Lake Powell will not change as a result of the HFE.
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Old 10-27-2016   #20
 
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It was officially announced today! From the BuRec folks in Page, at the dam:

High Flow Experiment at Glen Canyon Dam

The Bureau of Reclamation will increase water releases from Glen Canyon Dam beginning on Monday, November 7, 2016 to support a high flow experiment (HFE) in partnership with the National Park Service, U.S. Fish and Wildlife Service and U.S. Geological Survey. This high flow experiment will include a peak magnitude release of approximately 36,000 cubic feet per second (cfs) for 96 hours to move accumulated sediment downstream to help rebuild beaches and backwater habitats. The decision to conduct this HFE was made following substantial consultation with Colorado River Basin states, American Indian tribes and involved federal and state agencies.

Reclamation and National Park Service officials remind recreational users to use caution along the Colorado River through Glen and Grand Canyons during the entire week of November 7. Flow level information will be posted at multiple locations in both Glen Canyon National Recreation Area and Grand Canyon National Park. Note that it will take several hours following the beginning and end of the HFE for high flow waters to reach and then recede at downstream locations in the canyons.

High flow experiments benefit the Colorado River ecosystem through Glen and Grand Canyons by moving sand in the river channel and re-depositing it in downstream reaches as sandbars and beaches. Those sandbars provide habitat for wildlife, serve as camping beaches for recreationists and supply sand needed to protect archaeological sites. High flows may also create backwater areas used by young native fishes, particularly the endangered humpback chub.

The HFE will not change the total annual amount of water released from Lake Powell to Lake Mead. Releases later in the water year will be adjusted to compensate for the high volume released during this high flow experiment.

Members of the media who wish to view the high flow experiment should contact Marlon Duke at 385-228-4845 or mduke@usbr.gov.

Additional information about this high flow experiment will be posted and updated online at: Adaptive Management Program | UC Region | Bureau of Reclamation.
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