The Tieton Canal

The Tieton Project of the United States Reclamation Service derives its water supply from the Tieton River, in the State of Washington, one of the feeders of the Naches, the most important tributary of the Yakima. The Tieton River drains a mountainous area of about 250 sq. miles on the east slope of the Cascade Range. Its summer flow seldom falls as low as 200 sec-ft. and then only for short periods, while the maximum flood flow has been estimated at from 14 000 to 20 000 sec-ft. An extensive glacier-covered district at the summit of the mountain range furnishes the bulk of the summer flow, which is distinguished by the turbid or light green color of the water due to glacial material carried in suspension.