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Río

(Encyclopedia)Río and Rio, respectively Spanish and Portuguese terms for river. For those not listed here, see under the second element of the name. Thus, for Río Lerma, see Lerma. ...

Mexico, Gulf of

(Encyclopedia)Mexico, Gulf of, arm of the Atlantic Ocean, c.700,000 sq mi (1,813,000 sq km), SE North America. The Gulf stretches more than 1,100 mi (1,770 km) from west to east and c.800 mi (1,290 km) from north t...

Milk, river, United States and Canada

(Encyclopedia)Milk, river, 729 mi (1,173 km) long, rising in the Rocky Mts., NW Mont. It flows N into Alberta, Canada, then in long curves eastward, S into Montana again, and generally SE to the Missouri River, ent...

Niagara, river, United States and Canada

(Encyclopedia)Niagara nīăgˈrə [key], river, 34 mi (55 km) long, issuing from Lake Erie between Buffalo, N.Y., and Fort Erie, Ont., Canada. It flows north around Grand Island and over Niagara Falls to Lake Ontar...

Fox, river, United States

(Encyclopedia)Fox, river, 176 mi (283 km) long, rising in S central Wis. and flowing SW to within 1.5 mi (2.4 km) of Portage, Wis., on the Wisconsin River, then NE through Lake Winnebago into Green Bay, an arm of L...

Salmon, river, United States

(Encyclopedia)Salmon, river, c.425 mi (680 km) long, rising in many branches in the Sawtooth and the Salmon River mts., central Idaho. It flows northeast and is joined, at Salmon, by the Lemhi River, after which it...

Boise, river, United States

(Encyclopedia)Boise, river, c.160 mi (260 km) long, rising in SW Idaho and flowing west to join the Snake River at the Oregon line. In 1811 the Boise River, originally called Reed's River, was explored by an expedi...

Provo, river, United States

(Encyclopedia)Provo, river, c.70 mi (110 km) long, rising in the Uinta Mts., NE Utah, and flowing SW past Provo to Utah Lake. It was early used for irrigation, but after Utah Lake was badly depleted in the 1930s, t...

Elephant Butte Dam

(Encyclopedia)Elephant Butte Dam, main unit of the Rio Grande project of the U.S. Bureau of Reclamation on the Rio Grande, SW N.Mex.; completed 1916. The dam, with its large reservoir, is used for flood control, hy...

Piedras Negras, city, Mexico

(Encyclopedia)Piedras Negras, city (1990 pop. 96,178), Coahuila state, N Mexico, on the Rio Grande opposite Eagle Pass, Tex. Founded in 1849, the city grew as an international shipping point. Piedras Negras is a co...