One tributary of this river is fed by the Duchesne and Yampa rivers; that tributary of this river is called the Green river. 
One tributary of this river is fed by the Duchesne and Yampa rivers; that tributary of this river is called the Green river. The Black Canyon is formed by this river, which then flows south where it is met by the Gila River near the city of Yuma. The town of Page is near the Glen Canyon Dam on this river. A Compact named after this river divvies up its water between six states, although California's use of the surplus water has caused calls for renegotiation. Lake Powell and Lake Mead are both formed by dams on this river. For 10 points, name this river of the Southwestern U.S. that flows through the Grand Canyon.
One tributary of this river is fed by the Duchesne and Yampa rivers; that tributary of this river is called the Green river.
Colorado River