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Imperial Valley

(Encyclopedia)Imperial Valley, fertile region in the Colorado Desert, SE Calif., extending S into NW Mexico. Once part of the Gulf of California, most of the region is below sea level; its lowest point is −232 ft...

Yuma, indigenous people of North America

(Encyclopedia)Yuma yo͞oˈ mə [key], Native North Americans whose language belongs to the Yuman branch of the Hokan-Siouan linguistic stock (see Native American languages). Also known as the Quechan, they formerly...

Hoover Dam

(Encyclopedia)Hoover Dam, 726 ft (221 m) high and 1,244 ft (379 m) long, on the Colorado River between Nev. and Ariz.; one of the world's largest dams. Built between 1931 and 1936 by the U.S. Bureau of Reclamation,...

Guadalupe Hidalgo, Treaty of

(Encyclopedia)Guadalupe Hidalgo, Treaty of, 1848, peace treaty between the United States and Mexico that ended the Mexican War. Negotiations were carried on for the United States by Nicholas P. Trist. The treaty wa...

Pueblo, city, United States

(Encyclopedia)Pueblo pwĕbˈlō, pyo͞oĕbˈlō [key], city (1990 pop. 98,640), seat of Pueblo co., S central Colo., on the Arkansas River in the foothills of the Rockies; inc. 1885. It is the center of shipping, r...

Colorado School of Mines

(Encyclopedia)Colorado School of Mines, at Golden; state supported, coeducational; chartered 1874. It was one of the first mineral engineering schools in the United States. It owns extensive experimental and resear...

Reclamation, United States Bureau of

(Encyclopedia)Reclamation, United States Bureau of, agency set up in the Dept. of the Interior under the Reclamation Act of 1902. It is charged with promoting regional economies by developing water and related land...

Colorado Springs

(Encyclopedia)Colorado Springs, city (2020 pop. 478,961), seat of El Paso co., central Colo., on Monument and Fountain creeks, at the foot of Pikes Peak; inc. ...

Mead, Lake

(Encyclopedia)Mead, Lake, 247 sq mi (640 sq km), on the Nev.-Ariz. border, formed by Hoover Dam across the Colorado River. The lake is 115 mi (185 km) long, from 1 to 8 mi (1.6–12.9 km) wide, and 589 ft (180 m) a...

Boulder, city, United States

(Encyclopedia)Boulder, city (2020 pop. 330,758), seat of Boulder co., N central Colo.; inc. 1871. A Rocky Mountain resort and a suburb of Denver, it is the seat of th...
 

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