A brightly-lit canyon wall reflects in water flowing across the sculpted streambed of Navajo Sandstone along Fifty Mile Gulch at a location 25 feet below the high-water mark of Lake Powell. This streambed has only recently emerged into the light of day after being submerged beneath the reservoir's water and a 15-foot deep layer of reservoir sediment. As the waters of Lake Powell invaded this canyon after the floodgates were closed on Glen Canyon Dam in 1963, silt-laded floodwaters poured down from above and dropped their load of sediment into the stagnant waters of the reservoir here. These sediments settled onto and eventually smothered this sandstone streambed. As the water level of the reservoir dropped due to the drought which began in 1999, and the waters of the reservoir receded down canyon, this accumulated sediment was flushed away by more recent flash floods, all the way down to the pre-reservoir bedrock, thus restoring 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.