where (in the world) did one of the first attempts to build a big dam take place?
what important feature was located in the middle of this dam?
in the 1960s, the egyptians worked with russia to create a dam on the nile river , how many miles of desert does the lake behind the dam cover?
in the 1960s, the egyptians worked with russia to create a dam on the nile river , as the lake levels were rising behind the dam, what happened to the ancient monuments?
when was the hoover dam completed?
what california city agreed to purchase the electricity from the hoover dam once completed?
when was the hoover dam inaugurated by roosevelt?
how many generators does the hoover dam have creating electricity?
what are spillways on a dam? why are they important?