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00138_Text_138.txt
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1998-04-16
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Dam Authorized by U.S. Congress: April 11, 1956
First construction begun: October 1, 1956
Colorado River diverted: February 11, 1959
First concrete poured: June 17, 1960
Last concrete poured: September 13, 1963
Height above bedrock: 710 feet (216.4 meters)
Height above original river channel: 638 feet (194.5 meters)
Thickness of dam in bedrock foundation: 300 feet (91.4 meters)
Thickness of dam at crest: 25 feet (7.6 meters)
Length of dam at crest: 1,560 feet (475.5 meters)
Concrete in dam and powerplant: 5,370,000 cubic yards (3,747,083cm)
Cost of dam alone: $187 million
Cost of dam, powerplant, and entire project: $314 million
First storage of water in Lake Powell: March 13, 1963
Lake Powell reached full pool elevation: June 22, 1980
Full pool elevation: 3,700 feet
Depth of full pool at dam: 560 feet (170.7 meters)
Elevation of crest of dam: 3,715 feet above sea level (1132.3 m)
Capacity of Lake Powell: 27,000,000 acre feet
Number of generators in powerplant: Eight
Initial power generated: September 4, 1964
Total generating capacity: 1,320,000 kilowatts