sentences:  Other tributaries include Patit Creek, which joins the Touchet at Dayton; Coppei Creek, which enters at Waitsburg, and Whetstone Creek, which joins the Touchet at Prescott.The Touchet is known for its rainbow and cutthroat trout fishing, especially in the upper and middle reaches.Summer steelhead, which like salmon are anadromous, and Chinook salmon spawn throughout a large portion of the middle and upper reaches of the Touchet River drainage, the population is imperiled in the 21st century.