SH Populations
Conclusions
Prosser Dam
Resident Trout
Roza Dam SH
Introduction
Federal
Evolutionary Significant Unit (ESU)
•Inland Steelhead – Middle Columbia River
Washington State
Genetic Diversity Units (GDU)
•Yakima River
Salmonid Stock Inventory (SaSI)
•Satus Creek
•Toppenish Creek
•Naches River
•upper Yakima (above Roza Dam)               
Yakima Steelhead Population Classification
Steelhead, the anadromous form of Oncorhynchus mykiss, occupying the Columbia River Basin between the Wind (Washington) and Hood (Oregon) Rivers upstream to include the Yakima River are a part of the Inland Steelhead – Middle Columbia River ESU

Collection of data for population delineation largely from the YKFP