Hoover Dam Spillway is a photograph by Mark Ross which was uploaded on February 27th, 2014.
Hoover Dam Spillway
The dam is protected against over-topping by two spillways. The spillway entrances are located behind each dam abutment, running roughly parallel to... more
by Mark Ross
Title
Hoover Dam Spillway
Artist
Mark Ross
Medium
Photograph - Digital Photo
Description
The dam is protected against over-topping by two spillways. The spillway entrances are located behind each dam abutment, running roughly parallel to the canyon walls. The spillway entrance arrangement forms a classic side-flow weir with each spillway containing four 100 ft (30 m) long and 16 ft (4.9 m) high steel drum gates. Each gate weighs 5,000,000 pounds (2,300,000 kg) and can be operated manually or automatically. Gates are raised and lowered depending upon water levels in the reservoir and flood conditions. The large spillway tunnels have only been used twice, for testing in 1941 and because of flooding in 1983. (ref. Wiki)
Uploaded
February 27th, 2014
