When Lake Powell was last full in 1999, its waters filled these narrows to a depth 50 feet above this streambed. The "bathtub ring" from the reservoir has been washed off the walls here due to the high velocity of silt-laden water which scours these narrows during flash floods. During the time the reservoir flooded this canyon from the late 60s until 1999, these floods poured down from its headwaters and dropped their burden of sediment into the reservoir here and eventually filled these narrows with mud and other debris to the depth of 30 feet. When the level of the reservoir began to drop in the year 2000 due to a regional drought, it eventually receded downstream far enough that flash floods could begin to scour away this layer of sediment. By the time this image was captured in October of 2007, all of this accumulated sediment had been cleaned out of these narrows to restore the pre-reservoir conditions found here. Glen Canyon National Recreation Area, Utah. Photo Date: October 2007. This horizontal photograph was captured using a 6x7 format camera. All photos in these galleries may be ordered as fine art framed prints or for stock photography usage.