The Snake River Fall-Run Chinook ESU includes all naturally spawned populations of fall-run Chinook salmon in the mainstem Snake River below Hells Canyon Dam, and in the Tucannon River, Grande Ronde River, Imnaha River, Salmon River, and Clearwater River, as well as four artificial propagation programs: the Lyons Ferry Hatchery, Fall Chinook Acclimation Ponds Program, Nez Perce Tribal Hatchery, and Oxbow Hatchery fall-run Chinook hatchery programs. Definition implemented by Columbia River DART starting June 2007.
The Snake River Hatchery Fall Chinook group consists of all hatchery populations matching the Snake River Fall-Run Chinook ESU geographic designations: the mainstem Snake River below Hells Canyon Dam and the Tucannon River, Grande Ronde River, Imnaha River, Salmon River, and Clearwater River.