Building scenes of the dam in Puerto Rico which is nearing completion
The sluices of Nevada's Boulder Dam are opened to mark the Anniversary of its opening.
Russian scientists explore the ways of harnessing natural steam.
Eisenhower pressing handle which starts power supply, turbine generator, diagram registering.
Kuibyshev power plant starts up its 20th turbine. Russia.
New hydro electric power plant being built in Scotland.
A look at new Ben Cruachan dam in Scotland.