When Lake Powell was last full in 1999, its waters rose 50 feet up the orange wall at right center as evidenced by the remnants of the reservoir's white "bathtub ring". During the time the reservoir flooded this canyon from the late 60s until 1999, flash 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 height of the green bush at the center of the image. When the level of the reservoir began to drop in the year 2000 due to a regional drought, it eventually receded downstream far enough from these narrows that flash floods could begin to scour away this 30-foot deep layer of reservoir sediment. By the time this image was captured in October of 2007, all of this accumulated sediment had been cleaned out 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.