barrier
block
builtstructure
cement
civil
concrete
confine
conservation
construction
dam
electrical
electricity
energy
engineering
environment
environmental
flood
fuelandpowergeneration
generate
generating
generator
hydro
hydroelectric
hydroelectricpowerstation
hydropower
industrial
industry
lake
landmark
landscape
mountain
nature
obstruct
power
release
reservoir
resource
river
road
spillway
structure
technology
turbine
valley
voltage
volts
wall
water
watts