Green River (Colorado River tributary)

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The Green River is a 730 mi (1,170 km) long river located in the western U.S. states of Wyoming, Utah, and Colorado. The chief tributary of the Colorado River, its watershed, the Green River Basin, begins in the Wind River Range of Wyoming and flows through Wyoming and Utah for most of its course, except for a short segment of 40 miles (64 km) in western Colorado. Much of the route traverses the arid Colorado Plateau, where the river has carved some of the most spectacular canyons in the United States. The Green is slightly smaller than Colorado when the two rivers merge, but typically carries a larger load of silt. The average yearly mean flow of the river at Green River, Utah, is 6,121 cubic feet (173.3 m3) per second. The status of the Green River as a tributary of the Colorado River came about mainly for political reasons. In earlier nomenclature, the Colorado River began at its confluence with the Green River. Above the confluence, the Colorado was called the Grand River. In 1921,...

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