8 There are 4 intake towers 2 on the Arizona side and 2 on the Nevada side.
9 How power is GeneratedWater passes through screens on the intake towers and flows through the penstocks (30 ft in Diameter) to the generators falling an average of 420 feet. (head)Water reaches a speed of 85 mph by the time it reaches the generators.
10 Water from the Penstock turns a shaft on the generators. Rotors, made up of electromagnets, are connected to the shaft and spin around a coil of copper wire, generating an electric current.
13 Transmission LinesLines Deliverpower to NV,AZ and CA
14 Lake Mead Flooded The Black Canyon of the Colorado River Covers 247 mi 2Popular recreation spot for boating, fishing and water sportsFlooded many small communities including St. Thomas NV.White bathtub ring marks the 1983 high water mark result of the El Niño
18 Construction at Night, July 1934 To learn more about the Construction of Hoover Dam visit this website:
19 Endangered FishAt least two species of fish have had a major decline since the construction of Hover Dam, the Razorback Sucker (right) and the Bonytail (left)
20 BonytailThis fish was listed as endangered in There are no known breeding populations left in the wild. Reintroduction is happening through stocking in the areas shown on the map.
21 Razorback SuckerThis fish is limited to 25% of its original range. Most of the population consists of adults due to low survival rates of young fish. The hump on the fishes back provides stability in turbulent water.
22 Reasons for declineAlteration of the Colorado River system from a turbulent river to a series of calm reservoirs and channelized reachesNurseries of the fish have been floodedDams block upstream migrationNon-native sport fishLack of warm seasonal flow, water from the dams is always cold.Other introduced animals, plants, pathogens and contaminants.