The Glen Canyon Dam is high from the foundations and stands above the Colorado River. The crest of the dam is long and wide, while the maximum thickness of the base is . The elevation at the crest is , and the elevation of the Colorado River below the dam is . In total, the dam contains of concrete and of reinforcing steel. The hydroelectric power station and river outlet works are located at the foot of the dam. The outlet works consist of four diameter pipes, each controlled by a ring gate and hollow-jet valve. The discharge capacity of the river outlet works is .