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Powell, Lake

(Encyclopedia) Powell, Lake: see Glen Canyon Dam.

Glen Canyon Dam

(Encyclopedia) Glen Canyon Dam, 710 ft (216 m) high, 1,560 ft (475 m) long, NE Ariz., on the Colorado River. The key unit of the U.S. Bureau of Reclamation's Colorado River storage project, it is one…

Colorado River storage project

(Encyclopedia) Colorado River storage project, a multipurpose plan, undertaken by the U.S. Bureau of Reclamation in 1956, to control the flow of the upper Colorado and its tributaries and to aid in…

Grand Canyon

(Encyclopedia) Grand Canyon, great gorge of the Colorado River, one of the natural wonders of the world; c.1 mi (1.6 km) deep, from 4 to 18 mi (6.4–29 km) wide, and 217 mi (349 km) long, NW Ariz. The…

National Recreation Areas

Name and location Total acreageAmistad (Tex.) 58,500.00Bighorn Canyon (Wyo.-Mont.) 120,296.22Big South Fork (Ky.-Tenn.)125,310.34Boston Harbor Islands (Mass.)1,482.25Chattahoochee River (Ga…

Jurassic period

(Encyclopedia) Jurassic periodJurassic periodjərăsˈĭk [key] [from the Jura Mts.], second period of the Mesozoic era of geologic time, lasting from 213 to 144 million years ago. At the start of the…

Colorado, rivers, United States and Mexico

(Encyclopedia) ColoradoColorado[1] kŏlərădˈə, –rădˈō, –räˈdō [2] kŏlərāˈdə, –räˈdə [key]. 1 Great river of the SW United States, 1,450 mi (2,334 km) long, rising in the Rocky Mts. of N Colo., and…

flood, in hydrology

(Encyclopedia) flood, inundation of land by the rise and overflow of a body of water. Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of…

Utah , state, United States

(Encyclopedia) CE5 UtahUtahy&oomacr;ˈtäˌ [key], Rocky Mt. state of the W United States. It is bordered by Idaho and Wyoming (N), Colorado (E), Arizona (S), and Nevada (W), and touches New…

World's Highest Dams

Name River, locationStructuralheight Grossreservoir capacity YearcompletedftmThousandsof ac ftMillionsof cu mRogun Vakhsh, Tajikistan 1,099 335 9,404 11,600 1985Nurek Vakhsh, Tajikistan 984…