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Colorado River

Navajo Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1920-1929DateCreated: 1929Marble CanyonPageState: AZZip: 86036Country: USAWebsite: http://www.asce.org/Project/Navajo-Bridge/Creator: Arizona Highway Department

Navajo Bridge spans Marble Canyon, 470 feet above the Colorado River in Grand Canyon National Park. It was considered the highest steel arch bridge in America when completed.

The Navajo Bridge (also known as the Grand Canyon Bridge) was built in 1929 by the Arizona Highway Department and provided a vital transportation link over the Grand Canyon between northern Arizona and southern Utah. Construction commenced by building on one side of the canyon, then on the other, until the two sides met in the middle.

YearAdded:
1997
Image Credit: Courtesy Flickr/Frank Kovalchek (CC BY 2.0)Image Caption: Navajo BridgeEra_date_from: 1929
Hoover Dam
Society: ASCEMain Category: CivilSub Category: DamsEra: 1930-1939DateCreated: 1935Colorado RiverBoulder CityState: AZZip: 86443Country: USAWebsite: http://www.asce.org/Project/Hoover-Dam/Creator: Six Companies, Inc., Davis, Arthur

In 1918, the U.S. Reclamation Service's director and chief engineer Arthur P. Davis proposed a dam of unprecedented height to control the devastating floods on the Colorado River, generate hydroelectric power, and store the river's ample waters for irrigation and other uses.

YearAdded:
1984
Image Credit: Courtesy of Flickr/JoshBerglund19 (CC BY 2.0)Image Caption: Hoover DamEra_date_from: 1935
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