View source for The 1965 Reservoir Equalization and Channel Cleaning Floods


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The 1965 floods were designed to raise the elevation of 
Lake Mead reservoir and to scour the reach immediately 
below Glen Canyon Dam in order to increase the efficiency 
of the power plant at the dam, and were referred to informally by Bureau of
Reclamation engineers as "channel cleaning flows"
(Grams and others, Utah State University, written
commun., 2002). During these 3 months of high
discharge, approximately 5.0 million tons of fine sediment
(that is, sand and finer material) were scoured from Glen
Canyon between the dam and Lees Ferry (computed on
the basis of the USGS daily suspended-sediment data
from the Lees Ferry gaging station; U.S. Geological
Survey, accessed November 15, 2000), and approximately
17.6 million tons of fine sediment were scoured from the
reach between the Lees Ferry and Grand Canyon gaging
stations (Rubin and Topping, 2001). [https://pubs.usgs.gov/pp/pp1677/pdf/pp1677.pdf Pages 46-47 ]

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*Topping et al. 2003.  Computation and analysis of the instantaneous-discharge record for the Colorado River at Lees Ferry, Arizona, May 8, 1921 through September 30, 2000: U.S. Geological Survey Professional Paper 1677, 118 p. https://pubs.usgs.gov/pp/pp1677/pdf/pp1677.pdf

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