aged
architecture
blue
clean
columbia
columbia river
concrete
coulee
dam
electric
electricity
energy
engineering
fuel
generation
generator
grand
grand coulee
grand coulee dam
huge
hydroelectric
industrial
industry
lake
landmark
landscape
large
line
lines
northwest
old
pollution
power
river
scenic
science
state
strong
structure
transmission
travel
turbines
washington
washington state
water
wires