Glen Canyon Dam

Glen Canyon Dam is a concrete arch dam on the Colorado River in northern Arizona in the United States, just north of Page. The dam was built to provide hydroelectricity and flow regulation from the upper Colorado River Basin to the lower. Its reservoir is called Lake Powell, and is the second largest artificial lake in the country, extending upriver well into Utah. The dam is named for Glen Canyon, a colorful series of gorges most of which now lies under the reservoir.

Type of dam 	        Concrete thick arch-gravity

Height 	                710 feet (220 m)

Length 	                1,560 feet (480 m)

Crest width 	        25 feet (7.6 m)

Base width 	        300 feet (91 m)

Volume 	                4,901,000 cubic yards (3,747,000 m3)

Crest elevation 	3,715 feet (1,132 m)

Impounds 	       Colorado River

Spillways 	        2

Type of spillway 	Concrete tunnels, inflows controlled by double radial gates

Spillway capacity 	276,000 cubic feet per second (7,800 m3/s)