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



Reply
 
Thread Tools Display Modes
 
Old 10-05-2016   #1
 
GCPBA's Avatar
 
Flagstaff, Arizona
Paddling Since: 1869
Join Date: Oct 2009
Posts: 124
Grand Canyon High Flow "Probably" Coming in November!

Grand Canyon, Colorado River Flows - October, November, December

10/5/16 Update: GCPBA has learned from Paul Davidson at Glen Canyon Dam that a meeting to discuss planning for a High-Flow Experiment was going to happen today, 10/5.

He said, "It looks like a High Flow will happen." It is "probable and favorable" that Glen Canyon Dam will release a river flow of about 35,000 cfs for 4 days during November.

Many 1,000's of metric tons of sediment have washed down the Paria River into the Colorado, which needs to be redistributed down the river corridor.

A high flow will likely occur starting November 7 or 14 and will last for 5-1/2 days total. The flow would rise to about a 35,000 cfs peak, stay there for 96 hours, then come back down to the level it was at before ramp-up.

The ranger at Lees Ferry, as part of the river orientation talk, will inform boaters who will be on their river trips during the high flow of the high flow details.

Campers at riverside should be very aware of rising and falling water at the beaches where their boats are tied up for the nights.

Boaters should be aware that some rapids will show major differences from what they may have seen before, when the flows were half, or less than half, of what they could encounter during a few days of November.

September 28, 2016 Update:

The release volume from Glen Canyon Dam for October, 2016, will be 600,000 acre-feet. Hourly releases during October, 2016, are anticipated to fluctuate between approximately 7,000 cfs in the nighttime and 13,000 cfs in the daytime.

The anticipated release volume for November, 2016, is 600,000 acre-feet. However, the release volume in November may be modified depending on the size and duration of a High-Flow Experiment, as described in the Environmental Assessment for Development and Implementation of a Protocol for High-Flow Experimental Releases from Glen Canyon Dam, Arizona, 2011 through 2020.

A fall HFE can be triggered any time during October-November. Our best preliminary data and model runs indicate we now have enough sediment input from the Paria River to trigger an HFE at Glen Canyon Dam under the HFE Protocol. The HFE Technical Team will be meeting to begin planning for a possible HFE and reviewing the status of resources and potential resource impacts.

At this time we do not have a set date for a fall HFE. Further data collection, modeling, and analysis prior to the end of October may modify the expected duration and/or magnitude of a HFE. A final determination on the timing, magnitude and duration of a potential fall 2016 HFE will likely be made near the end of October.

The anticipated release volume for December, 2016, is 900,000 acre-feet. This will be confirmed in a subsequent notification toward the end of October.

Paul Davidson, Hydraulic Engineer, Glen Canyon Dam

Bureau of Reclamation 125 S. State St. Salt Lake City, UT 84138 Ph: 801-524-3642

Posted by GCPBA, Grand Canyon Private Boaters Association | To ensure the ability for all to obtain an opportunity to experience a float trip through the Grand Canyon while protecting the resource.

GCPBA is offline   Reply With Quote
Old 10-06-2016   #2
 
Edwards, Colorado
Paddling Since: 2014
Join Date: Mar 2015
Posts: 33
Gonna make for an interesting twist for our November 25th launch.
Managan is offline   Reply With Quote
Old 10-06-2016   #3
 
Edwards, Colorado
Paddling Since: 2014
Join Date: Mar 2015
Posts: 33
October 25th that is
Managan is offline   Reply With Quote
Old 10-07-2016   #4
Top Quality River Gear
 
Cascade River Gear's Avatar
 
Boise, Idaho
Paddling Since: 1960
Join Date: Aug 2014
Posts: 107
WEEEE HAAAA... I cannot even imagine that kind of fluctuation while running the canyon. We will be patiently waiting for your report when you finish your trip and come back to the foggy reality of the world Managan!!
__________________
Cascade River Gear is offline   Reply With Quote
Old 10-08-2016   #5
 
Collings Lakes, New Jersey
Paddling Since: 1998
Join Date: Oct 2016
Posts: 1
I got to run the GC on my permit back in Oct/Nov 2014 and we had the HFE hit us in the afternoon we were hiking up Deer Creek and the Throne Room, thankfully we had 2 people down by the rafts to readjust and re-anchor the rafts. The river rose 4 verticle feet in a few hours and the boats would have washed downstream if they werent there.

I am on a friends trip launching Oct 26th and originally were planning a layover at Racetrack nov 7-8th. obviously we will have to adjust our plans.

here is my experience based on 37.5K Highlights from Deer Creek on down. Doris Rapid became huge offset waves that almost flipped multiple 18ft rafts. Upset Rapid was completely washed out. If you are able to make the move into Matkat, the water backwashes a considerable distance and becomes a surging tidal eddy. (actually was quite cool) The normal access to the trail in Havasu was no longer there. you either need an inflatable kayak or are willing to swim up the creek about 100yards to access the trail. Pumpkin Springs was completely under water, despite the river dropping (at 3:30am at 202 camp.) Diving board rock jump was a bit shorter LOL and finally. the last camp above Pearce was a huge deep mud hole mess. (the river significantly dropped by that point)
gauleygirl2000 is offline   Reply With Quote
Old 10-08-2016   #6
 
Flagstaff, Arizona
Paddling Since: 2002
Join Date: Nov 2010
Posts: 388
We ran Pierce Ferry to South Cove on that last big November flood. Both Pierce and Iceberg canyon were narrowly runnable but the added wood hazard made them very dangerous. Still a worthy permitless high water adventure. At the time the lake level was such that we had current well past sandy point on Lake Mead with amazing, huge sand waves forming that gave up some memorable surfs!


Sent from my iPhone using Mountain Buzz
jmacn is offline   Reply With Quote
Old 10-08-2016   #7
 
Flagstaff, Arizona
Paddling Since: 2002
Join Date: Nov 2010
Posts: 388
I don't recommend that trip for anyone not ready for Class V consequences however. Swimming could easily result in extremely bad outcomes down there...


Sent from my iPhone using Mountain Buzz
jmacn is offline   Reply With Quote
Old 10-10-2016   #8
 
Colo Springs, Colorado
Paddling Since: 1980
Join Date: Feb 2004
Posts: 609
Thank you to GCPBA for posting this information.

I hope we get reports and pictures from people. I'd like to see what some of the rapids look like from the scout points.
David L is offline   Reply With Quote
Old 10-10-2016   #9
 
kayakfreakus's Avatar
 
Steamboat, Colorado
Paddling Since: 1999
Join Date: Mar 2006
Posts: 887
Quote:
Originally Posted by David L View Post
Thank you to GCPBA for posting this information.

I hope we get reports and pictures from people. I'd like to see what some of the rapids look like from the scout points.
Have good friends who will be down there during this, so have that request in as well.
kayakfreakus is online now   Reply With Quote
Old 10-10-2016   #10
 
duct tape's Avatar
 
Colorado Springs, Colorado
Paddling Since: 1974
Join Date: Aug 2009
Posts: 657
Quote:
Originally Posted by gauleygirl2000 View Post
I got to run the GC on my permit back in Oct/Nov 2014 and we had the HFE hit us in the afternoon we were hiking up Deer Creek and the Throne Room, thankfully we had 2 people down by the rafts to readjust and re-anchor the rafts. The river rose 4 verticle feet in a few hours and the boats would have washed downstream if they werent there.

I am on a friends trip launching Oct 26th and originally were planning a layover at Racetrack nov 7-8th. obviously we will have to adjust our plans.

here is my experience based on 37.5K Highlights from Deer Creek on down. Doris Rapid became huge offset waves that almost flipped multiple 18ft rafts. Upset Rapid was completely washed out. If you are able to make the move into Matkat, the water backwashes a considerable distance and becomes a surging tidal eddy. (actually was quite cool) The normal access to the trail in Havasu was no longer there. you either need an inflatable kayak or are willing to swim up the creek about 100yards to access the trail. Pumpkin Springs was completely under water, despite the river dropping (at 3:30am at 202 camp.) Diving board rock jump was a bit shorter LOL and finally. the last camp above Pearce was a huge deep mud hole mess. (the river significantly dropped by that point)
Nice first post GG. Thanks for the great info.
duct tape is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Topic Thread Starter Forum Replies Last Post
RRFW Riverwire High Flow Experiment to begin November 10 Tom Martin Whitewater Rafting 0 10-30-2014 08:48 PM
Hi Flow in Grand Canyon this November Tom Martin Boaters Forum | General Boating Topics 0 10-10-2014 10:38 PM
grand canyon high flow/sediment input experiment coming in November barry Whitewater Kayaking 10 10-26-2012 12:24 PM
Obama wants high-paying, "high-skill" jobs in future caspermike The Eddy 1 03-26-2009 03:29 PM
RRFW Riverwire - RIVER RUNNER DIES IN GRAND CANYON HIGH FLOW cstork Whitewater Kayaking 2 11-29-2004 03:48 PM

» Classified Ads
Dagger Ovation White...

posted by 2ravens

One of the best solo white water canoes made. Double thigh...

New Zeland whitewater...

posted by go-with-the-Flo

Get ready to paddle in New Zeland with the New Zeland...

2014 Rockstar Jackson...

posted by Scardenas95

Great shape, excellent boat!

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 12:17 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.