Scott Evans (Former Employee)
Science and Products
Filter Total Items: 46
Assessing survival of Mid-Columbia River released juvenile salmonids at McNary Dam, Washington, 2008-09 Assessing survival of Mid-Columbia River released juvenile salmonids at McNary Dam, Washington, 2008-09
Few studies have evaluated survival of juvenile salmon over long river reaches in the Columbia River and information regarding the survival of sockeye salmon at lower Columbia River dams is lacking. To address these information gaps, the U.S. Geological Survey was contracted by the U.S. Army Corps of Engineers to evaluate the possibility of using tagged fish released in the Mid-Columbia...
Authors
Scott D. Evans, Christopher E. Walker, Scott J. Brewer, Noah S. Adams
Evaluation of strobe lights to reduce turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington Evaluation of strobe lights to reduce turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington
We conducted a radiotelemetry evaluation to determine if strobe lights could be used to decrease turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington. We found that radio-tagged juvenile steelhead approached and entered two spillbays (one lighted, one unlighted) in equal proportions. However, the presence of strobe lights was associated with...
Authors
Tobias J. Kock, Scott D. Evans, Theresa L. Liedtke, Dennis W. Rondorf, Mike Kohn
Performance of a prototype surface collector for juvenile salmonids at Bonneville dam's first powerhouse on the Columbia River, Oregon Performance of a prototype surface collector for juvenile salmonids at Bonneville dam's first powerhouse on the Columbia River, Oregon
During April-July 2000, we radio-tagged and released juvenile Chinook salmon (Oncorhynchus tshawytscha) and steelhead (Oncorhynchus mykiss) to evaluate a prototype surface flow bypass at Bonneville Dam on the Columbia River. The mock bypass, called a prototype surface collector (PSC), had six vertical slot entrances that were each 6 m wide and 12 m deep. The PSC was retrofitted to the...
Authors
S.D. Evans, N.S. Adams, D.W. Rondorf, J.M. Plumb, B.D. Ebberts
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2005 Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2005
No abstract available
Authors
R.E. Reagan, M.J. Farley, S.D. Evans, L.S Wright, N.S. Adams, D.W. Rondorf
Passage behavior of radio-tagged yearling Chinook salmon and steelhead at Bonneville Dam, 2004: Revised for corrected spill annual report Passage behavior of radio-tagged yearling Chinook salmon and steelhead at Bonneville Dam, 2004: Revised for corrected spill annual report
Flow augmentation, spill, surface collection, and improved turbine guidance systems have been identified as potential management actions to improve passage efficiency and survival of outmigrating juvenile salmonids. The U.S. Army Corps of Engineers (USACE), along with regional, state, and federal resource agencies, has designed and implemented studies to determine which management...
Authors
R.E. Reagan, S.D. Evans, L.S Wright, M.J. Farley, N.S. Adams, D.W. Rondorf
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2004 Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2004
Flow augmentation, spill, surface collection, and improved turbine guidance systems have been identified as potential management actions to improve passage efficiency and survival of outmigrating juvenile salmonids. The U.S. Army Corps of Engineers (USACE), along with regional, state, and federal resource agencies, has designed and implemented studies to determine which management...
Authors
R.E. Reagan, S.D. Evans, L.S Wright, M.J. Farley, N.S. Adams, D.W. Rondorf
Science and Products
Filter Total Items: 46
Assessing survival of Mid-Columbia River released juvenile salmonids at McNary Dam, Washington, 2008-09 Assessing survival of Mid-Columbia River released juvenile salmonids at McNary Dam, Washington, 2008-09
Few studies have evaluated survival of juvenile salmon over long river reaches in the Columbia River and information regarding the survival of sockeye salmon at lower Columbia River dams is lacking. To address these information gaps, the U.S. Geological Survey was contracted by the U.S. Army Corps of Engineers to evaluate the possibility of using tagged fish released in the Mid-Columbia...
Authors
Scott D. Evans, Christopher E. Walker, Scott J. Brewer, Noah S. Adams
Evaluation of strobe lights to reduce turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington Evaluation of strobe lights to reduce turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington
We conducted a radiotelemetry evaluation to determine if strobe lights could be used to decrease turbine entrainment of juvenile steelhead (Oncorhynchus mykiss) at Cowlitz Falls Dam, Washington. We found that radio-tagged juvenile steelhead approached and entered two spillbays (one lighted, one unlighted) in equal proportions. However, the presence of strobe lights was associated with...
Authors
Tobias J. Kock, Scott D. Evans, Theresa L. Liedtke, Dennis W. Rondorf, Mike Kohn
Performance of a prototype surface collector for juvenile salmonids at Bonneville dam's first powerhouse on the Columbia River, Oregon Performance of a prototype surface collector for juvenile salmonids at Bonneville dam's first powerhouse on the Columbia River, Oregon
During April-July 2000, we radio-tagged and released juvenile Chinook salmon (Oncorhynchus tshawytscha) and steelhead (Oncorhynchus mykiss) to evaluate a prototype surface flow bypass at Bonneville Dam on the Columbia River. The mock bypass, called a prototype surface collector (PSC), had six vertical slot entrances that were each 6 m wide and 12 m deep. The PSC was retrofitted to the...
Authors
S.D. Evans, N.S. Adams, D.W. Rondorf, J.M. Plumb, B.D. Ebberts
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2005 Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2005
No abstract available
Authors
R.E. Reagan, M.J. Farley, S.D. Evans, L.S Wright, N.S. Adams, D.W. Rondorf
Passage behavior of radio-tagged yearling Chinook salmon and steelhead at Bonneville Dam, 2004: Revised for corrected spill annual report Passage behavior of radio-tagged yearling Chinook salmon and steelhead at Bonneville Dam, 2004: Revised for corrected spill annual report
Flow augmentation, spill, surface collection, and improved turbine guidance systems have been identified as potential management actions to improve passage efficiency and survival of outmigrating juvenile salmonids. The U.S. Army Corps of Engineers (USACE), along with regional, state, and federal resource agencies, has designed and implemented studies to determine which management...
Authors
R.E. Reagan, S.D. Evans, L.S Wright, M.J. Farley, N.S. Adams, D.W. Rondorf
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2004 Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2004
Flow augmentation, spill, surface collection, and improved turbine guidance systems have been identified as potential management actions to improve passage efficiency and survival of outmigrating juvenile salmonids. The U.S. Army Corps of Engineers (USACE), along with regional, state, and federal resource agencies, has designed and implemented studies to determine which management...
Authors
R.E. Reagan, S.D. Evans, L.S Wright, M.J. Farley, N.S. Adams, D.W. Rondorf