PAYETTE RIVER

river formed by the confluence of the North and South forks in Boise National Forest, southwestern Idaho, U.S. It flows south and then west past Emmett to join the Snake River near Payette on the Oregon border after a course of about 70 miles (110 km). Black Canyon Dam and Reservoir on the Payette and the Cascade Dam and Reservoir on the North Fork are part of the Payette division of the Boise Irrigation Project.