Summary of juvenile salmonid passage and survival at McNary Dam-Acoustic survival studies, 2006-09

A Markov chain analysis of the movements of juvenile salmonids in the forebay of McNary Dam, Washington and Oregon, 2006-09

“…For both spring and summer, diel periods were assigned as day (0600-1759 hours) and night (1800-0559 hours). Additional information about project operations and treatments can be found in the annual reports of research (Adams and Counihan, 2009;Adams and Liedtke, 2010;and Adams and Evans, 2011). Spill bay 20 1 Treatments represent spill patterns proposed by regional fishery managers.…”

“…As a result of these studies, surface bypass structures (temporary spillway weirs; TSWs) were installed at McNary Dam and performance tests were conducted in 2007, 2008, and 2009. The 8 years of study at McNary Dam (2002-09) provided information that aided in developing management strategies to maximize passage and survival of juvenile salmonids passing the dam while meeting regional hydroelectric power generation needs. Research from the annual studies conducted at McNary Dam between 2006 and 2009 have been synthesized and presented in a single report (Adams and Evans, 2011). Summarizing the annual information in a single document is expected to provide a useful reference for managers during the development of long-term management strategies for McNary Dam.…”

A multi-year analysis of passage and survival at McNary Dam, 2004-09

“…Water temperatures were slightly lower (1-2°C) in 2008 than during the other 5 study years. For more detailed information on the environmental conditions and dam operations for individual years included in this analysis, please refer to Adams and Evans (2011). (table 1) and implanted with transmitters.…”

A Markov chain analysis of the movements of juvenile salmonids, including sockeye salmon, in the forebay of McNary Dam, Washington and Oregon, 2006-09

“…These studies found that non-turbine passage routes, such as the spillway and juvenile bypass system, provided higher survival compared to the turbines. Additional studies at Lower Granite Dam showed that surface passage structures appear to be a safe alternative to passage through the turbines (Plumb and others, 2004;Beeman and others, 2007;Perry and others, 2007b;Puls and others, 2008 (Adams and Evans, 2011). Summarizing the annual information in a single document is expected to provide a useful reference for managers during the development of long-term management strategies for McNary Dam.…”