The USACE technical leads were Mr. Brad Eppard and Mr. Fred Higginbotham. The study was designed to evaluate the passage and survival of yearling and subyearling Chinook salmon and juvenile steelhead at McNary Dam as stipulated by the 2008 Biological Opinion and Fish Accords and to assess performance measures including routespecific fish passage proportions, travel times, and survival based upon a virtual/paired-release model. This study supports the USACE's continual effort to improve conditions for juvenile anadromous fish passing through Columbia River dams.

The CENWP technical lead was Mr. Brad Eppard. This report presents survival, behavioral, and fish passage results for tagged yearling Chinook salmon and juvenile steelhead as part of a survival study conducted at John Day Dam during spring 2011. This study was designed to evaluate the passage and survival of yearling Chinook salmon and juvenile steelhead to assist managers in identifying dam operations for compliance testing as stipulated by the 2008 Federal Columbia River Power System Biological Opinion and the 2008 Columbia Basin Fish Accords. Survival estimates were based on a paired-release survival model.

The Dalles Dam (P Keller, B Cordie) and Bonneville Dam (B Hausmann, J Rerecich, I Royer, and A Traylor) provided coordination with the respective projects to facilitate safe and timely installation and removal of equipment and safe in-season monitoring.

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