Intake Towers - 1986
Hoover Dam - Power House - 1986
Hoover Dam - Power House - 1986 - HFF!
Eagle Crags West - Utah - 1986
Johnson Mountain - Utah - 1986
Zion National Park - 1986
Zion National Park - 1986
Pine Creek Canyon Overlook - 1986
Pine Creek Canyon Overlook - 1986
Zion NP - Canyon Overlook Trail - 1986
Zion NP - Canyon Overlook Trail - 1986
Zion NP - The Great Arch - 1986
Zion NP - 1986
Zion NP - 1986
Zion NP - 1986
Zion NP - Angel's Landing - 1986
The Great White Throne - 1986
Zion NP - Red Asphalt - 1986
Zion NP - Sandstone Wonders - 1986
Checkerboard Mesa - 1986
Est Fork Virgin River - 1986
Bryce Canyon - 1986 - HFF!
Red Canyon - Hoodoos - 1986
Arizona Spillway - 1986
Hoover Dam - 1986
Hoover Dam - Power Station - 1986
Hoover Dam - Power Stations - 1986
Hoover Dam - 1986
Hoover Dam - 1986
Hoover Dam - 1986
desert - 1986
Death Valley - Badwater - 1986
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Death Valley - Zabriskie Point - 1986
Death Valley - Zabriskie Point - 1986
Death Valley - Zabriskie Point - 1986
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Death Valley - 1986
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Owens Lake - 1986
Mariposa Grove - Grizzly Giant - 1986
Mariposa Grove - Grizzly Giant - 1986
Mariposa Grove - Grizzly Giant - 1986
Mariposa Grove - Bachelor and Three Graces - 1986
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Arizona Spillway - 1986


Hoover Dam is protected against an uncontrolled overflow by two flood spillways, one on the Nevada side and the other one the Arizona side. The spillways are controlled by drum gates and the overflow goes into side channels and huge 15 m wide tunnels to the tailwater. The total capacity is 11000 m³/s. The large spillway tunnels have only been used twice, for testing in 1941 and because of flooding in 1983.
scanned slides, Minolta X700

scanned slides, Minolta X700

Marco F. Delminho, Frans Schols, Erhard Bernstein, Smiley Derleth and 22 other people have particularly liked this photo
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Won't happen again in our lifetimes, most likely!
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