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| | Boulder Canyon Project-Hoover Dam |
 | | The dam, powerplant, and high-voltage switchyards are located in the Black Canyon of the Colorado River on the Arizona-Nevada state line. |
 | | Hoover Dam´s authorized purposes are: first, river regulation, improvement of navigation, and flood control; second, delivery of stored water for irrigation and other domestic uses; and third, power generation. |
 | | The height and base thickness of the dam, the size of the power units, the dimensions of the fusion-welded plate-steel pipes, the novel system of artificially cooling the concrete, the speed and coordination of construction, and other major features of the project were without precedent for their time. |
| www.usbr.gov /dataweb/html/bcphoover.html (2355 words) |
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