Truckee River - River Modifications

River Modifications

Like many other rivers in the western United States, the Truckee's flow is highly regulated with most of the river water fully allocated via water rights. Disputes occur among those claiming the water. In the early 20th century, waters of the river were diverted as part of the Newlands Reclamation Act. Currently the Truckee-Carson Irrigation District supervises the diversion of approximately one-third of the river flow at the Derby Dam to the Lahontan Valley to irrigate alfalfa and pastures. Its water is also supplied to the resort communities surrounding Lake Tahoe, the greater metropolitan area of Reno and Sparks, and the Pyramid Lake Paiute Indian Reservation. The U.S. Fish and Wildlife Service uses some of the water to induce spawning of the endangered fish cui-ui and to provide drought relief.