america
arizona
black canyon
boulder dam
bridge
building
colorado
colorado river
construction
control
current
dam
electricity
energy
flood control
gate
generator
gorge
hoover dam
hoover dam bypass
hydroelectric
hydroelectric power
lake
lake mead
nevada
power plant
power station
regulation
reservoir
river
rock face
rock formation
stone
stream
sunny
tower
united states of america
usa
valley
wall
water
water storage
watercourse