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In press
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2008
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2006
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2005
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2003
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2002
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1982
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1979
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1978
Click the links to go to documents. Click the green arrow  to see metadata.
In press
Enders, E. C., M. H. Gessel, J. G. Williams. In press. The behavioural response of downstream migrating fall Chinook salmon smolt to accelerating flows. Canadian Journal of Fisheries and Aquatic Sciences.
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2008
Kemp, P. S., M. H. Gessel, B. P. Sandford, J. G. Williams. 2008. Fish behaviour and passage efficiency: lessons from North America. Hydrobiologia, (609)205-217.
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2006
Kemp, P. S., M. H. Gessel, B. P. Sandford, J. G. Williams. 2006. The behaviour of Pacific salmonid smolts during passage over two experimental weirs under light and dark conditions. River research and applications, 22:429-440.
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2005
Absolon, R. F., M. H. Gessel, B. P. Sandford, G. M. Matthews. 2005. Evaluation of fish condition with prototype vertical barrier screens at McNary Dam, 2004. Report by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers. Walla Walla District, Contract W68SBV20655422, vi, 23 p.
Absolon, R. F., B. P. Sandford, M. B. Eppard, D. A. Brege, K. W. McIntyre, E. E. Hockersmith, G. M. Matthews. 2005. Relative survival estimates for PIT-tagged juvenile chinook salmon passing through turbines, collection channels, and spillways at Ice Harbor Dam, 2003. Report by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers. Walla Walla District, Contract W68SBV92844866, v, 58 p.
Brege, D. A., L. G. Gilbreath, R. F. Absolon, B. P. Sandford, G. M. Matthews. 2005. Studies to evaluate the effectiveness of extended-length screens at John Day Dam, 2004. Report by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers. Portland District, Contract W66QKZ90392273, vi, 40 p.
Ferguson, J. W., R. F. Absolon, T. Carlson, B. P. Sandford. 2005. Evidence of delayed mortality in juvenile Pacific salmon passing through turbines at Columbia River dams. Transactions of the American Fisheries Society, 135:139-150.
Ferguson, J. W., G. M. Matthews, R. L. McComas, R. F. Absolon, D. A. Brege, M. H. Gessel, L. G. Gilbreath. 2005. Passage of adult and juvenile salmonids through Federal Columbia River Power System dams. U.S. Dept. of Commerce, NOAA Tech. Memo., NMFS-NWFSC-64, 160 p.
Gessel, M. H., R. L. McComas, G. M. Matthews. 2005. Studies to establish biological design criteria for fish passage facilities: separation by size of juvenile salmonids using a high-velocity flume at Ice Harbor Dam in 2004. Report by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers. Walla Walla District, Contract W68SBV00358064, vi, 18 p.
Kemp, P. S., M. H. Gessel, J. G. Williams. 2005. Fine-scale behavioral responses of Pacific salmonid smolts as they encounter divergence and acceleration of flow. Transactions of the American Fisheries Society, 134:390-398.
Kemp, P. S., M. H. Gessel, J. G. Williams. 2005. Seaward migrating subyearling chinook salmon avoid overhead cover. Journal of Fish Biology, 67:1381-1391.
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2004
Brege, D. A., R. F. Absolon, B. P. Sandford, J. W. Ferguson. 2004. Evaluation of extended-length submersible bar screens at John Day Dam, 2002. Report by Report of Research by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers, Portland District, vi, 53 p.
Gessel, M. H., B. P. Sandford, J. W. Ferguson. 2004. Studies to establish biological design criteria for fish passage facilities: prototype testing of a cylindrical dewatering screen at McNary Dam 2001-2002. Report of Research by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers Walla Walla District, vi, 19 p p. (PDF | Video files index page)
Monk, B. H., B. P. Sandford, D. A. Brege, J. W. Ferguson. 2004. Evaluation of turbine intake modifications at Bonneville Dam second powerhouse, 2002. Report of Research by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers, Portland, OR, vi, 48 p p.
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2003
Absolon, R. F., D. A. Brege. 2003. Canister for releasing marked fish at depth in hydroelectric dam gatewells and forebays. North American Journal of Fisheries Management, 23:605-610.
Absolon, R. F., M. B. Eppard, B. P. Sandford, G. A. Axel, E. E. Hockersmith, J. W. Ferguson. 2003. Effects of turbines operating at two different discharge levels on survival and condition of yearling chinook salmon at McNary Dam, 2002. Report of Research by Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration to the U.S. Army Corps of Engineers, Walla Walla District, v, 20 p.
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2002
Absolon, R. F., E. M. Dawley, B. P. Sandford, J. W. Ferguson, D. A. Brege. 2002. Relative survival of juvenile salmon passing through the spillway of The Dalles Dam, 1997-2000. Report of Research, Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, ix, 150 p.
Monk, B. H., R. F. Absolon, B. P. Sandford, J. W. Ferguson. 2002. Evaluation of intake modifications at Bonneville Dam second powerhouse, 2001. Report of Research, Fish Ecology Division, Northwest Fisheries Science Center, v, 40 p.
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2001
Brege, D. A., J. W. Ferguson, R. F. Absolon, B. P. Sandford. 2001. Evaluation of extended-length bypass screens at John Day Dam, 1999. Report to the U.S. Army Corps of Engineers, Portland District, Contract W66QKZ90392273, 21 p. plus appendices.
Brege, D. A., M. H. Gessel, R. F. Absolon, B. P. Sandford, J. W. Ferguson. 2001. Studies to evaluate the effectiveness of outlet flow-control and debris control devices at McNary and Little Goose Dams, 1998. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract E86970083, 16 p. plus appendices.
Gessel, M. H., J. W. Ferguson. 2001. Evaluation of a high-velocity induction/release system for testing turbine-related injuries to juvenile salmonids at hydroelectric projects. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract W68SBV82443526, 7 p. plus appendix.
McComas, R. L., M. H. Gessel, B. P. Sandford, D. B. Dey. 2001. Biological design criteria for juvenile fish passage, 1998: high-velocity flume development and improved wet-separator efficiency. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract E86910060, 33 p. plus appendix.
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2000
Absolon, R. F., D. A. Brege, J. W. Ferguson. 2000. Post-construction evaluation of the juvenile bypass system at John Day Dam, 1999. Report to the U.S. Army Corps of Engineers, Contract W66QKZ80354028, 14 p.
Absolon, R. F., B. P. Sandford, D. B. Dey. 2000. Post-construction evaluation of the new juvenile bypass system and guidance screen modifications at John Day Dam, 1998. Report to the U.S. Army Corps of Engineers, Contract W66QKZ80354028, 34 p. plus appendices.
Dawley, E. M., L. G. Gilbreath, R. F. Absolon, B. P. Sandford, J. W. Ferguson. 2000. Relative survival of juvenile salmon passing through the spillway and the ice trash sluiceway of The Dalles Dam, 1998. Report to the U.S. Army Corps of Engineers, Contract MIPR E96970020, W66QKZ82167243 and W66QKZ83437725, 47 p. plus appendices.
Dawley, E. M., C. J. Ebel, R. F. Absolon, B. P. Sandford, J. W. Ferguson. 2000. Relative survival of juvenile salmon passing through the spillway of The Dalles Dam, 1999. Report to the U.S. Army Corps of Engineers, Portland District, Contract W66QKZ83437725, 42 p. plus appendices.
Gessel, M. H., B. H. Monk, B. P. Sandford, J. W. Ferguson. 2000. Evaluation of a chamfered perforated plate for extended-length bar screens at Little Goose and McNary Dams, 1999. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract W68SBV80210987, 10 p. plus appendix.
Gessel, M. H., B. P. Sandford, J. W. Ferguson. 2000. Evaluation of the effectiveness of an orifice shelter at McNary Dam, Columbia River, 1999. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract W68SBV80210987, 10 p. plus appendix.
McComas, R. L., M. H. Gessel, B. P. Sandford, D. B. Dey, D. M. Katz. 2000. Biological design criteria for improved wet-separator efficiency and high-velocity flume development, 1997. Report to the U.S. Army Corps of Engineers, Walla Walla District, Contract E86910060, 22 p. plus appendices.
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1999
Absolon, R. F., E. M. Dawley, B. P. Sandford. 1999. Changes in gas bubble disease signs of migrating juvenile salmonids experimentally exposed to supersaturated gasses, 1997. Report to the Bonneville Power Administration, Contract 96-BI-93892, 16 p.
Brege, D. A., M. H. Gessel, R. F. Absolon, B. P. Sandford, J. W. Ferguson. 1999. Studies to evaluate the effectiveness of outlet flow-control and debris control devices at McNary and Little Goose Dams, 1998. Report to the U.S. Army Corps of Engineers, Contract E86970083, 20 p. plus appendices.
Monk, B. H., M. H. Gessel, J. W. Ferguson. 1999. An evaluation of the biological database for improving fish guidance efficiency at Bonneville Dam Second Powerhouse. Report to the U.S. Army Corps of Engineers, Contract W66QKZ90059456, 62 p.
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1998
McComas, R. L., M. H. Gessel, B. P. Sandford, D. B. Dey. 1998. Studies to establish biological design criteria for wet separators, 1996. Report to the U.S. Army Corps of Engineers, Contract E86910060, 44 p.
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1997
Brege, D. A., R. F. Absolon, B. P. Sandford, D. B. Dey. 1997. Studies to evaluate the effectiveness of extended-length screens at John Day Dam, 1996. Report to the U.S. Army Corps of Engineers, Contract E96960028, 41 p.
Brege, D. A., R. F. Absolon, B. P. Sandford, D. B. Dey. 1997. Studies to evaluate the effectiveness of extended-length screens at The Dalles Dam, 1995. Report to the U.S. Army Corps of Engineers, Contract E96930030, 24 p. plus appendices.
Gessel, M. H., B. P. Sandford, D. B. Dey. 1997. Post-construction evaluation of the juvenile salmonid bypass system at Ice Harbor Dam, 1996. Report to the U.S. Army Corps of Engineers, Contract E86960098, 20 p.
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1996
Brege, D. A., R. F. Absolon, R. J. Graves. 1996. Seasonal and diel passage of juvenile salmonids at John Day Dam on the Columbia River. North American Journal of Fisheries Management, 16(3):659-665.
Gessel, M. H., B. P. Sandford, D. B. Dey. 1996. Studies to evaluate the effectiveness of extended-length screens at Little Goose Dam, 1995. Annual Report to the U.S. Army Corps of Engineers, Delivery Order E86920164, 17 p.
Muir, W. D., S. G. Smith, E. E. Hockersmith, S. Achord, R. F. Absolon, P. A. Ocker, M. B. Eppard, T. E. Ruehle, J. G. Williams, R. N. Iwamoto, J. R. Skalski. 1996. Survival estimates for the passage of the yearling chinook salmon and steelhead through Snake River dams and reservoirs, 1995. Report to the Bonneville Power Administration, Contract E86940119, 88 p. plus appendices.
Williams, J. G., M. H. Gessel, B. P. Sandford, J. J. Vella. 1996. Evaluation of factors affecting juvenile chinook salmon fish guidance efficiency. Report to the U.S. Army Corps of Engineers, Project No. E86910059, 35 p.
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1995
Absolon, R. F., D. A. Brege, B. P. Sandford, D. B. Dey. 1995. Studies to evaluate the effectiveness of extended-length screens at The Dalles Dam, 1994. Report to the U.S. Army Corps of Engineers, Contract E96930030, 69 p.
Gessel, M. H., B. P. Sandford, D. B. Dey. 1995. Studies to evaluate the effectiveness of extended-length screens at Little Goose Dam, 1994. Report to the U.S. Army Corps of Engineers, Contract E86920164, 33 p.
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1994
Brege, D. A., R. F. Absolon, B. P. Sandford, D. B. Dey. 1994. Studies to evaluate the effectiveness of extended-length screens at The Dalles Dam, 1993. Report to the U.S. Army Corps of Engineers, Contract E96930030, 72 p.
Gessel, M. H., B. P. Sandford, B. H. Monk, D. A. Brege. 1994. Population Estimates of Northern Squawfish, Ptychocheilus oregonensis, at Bonneville Dam First Powerhouse, Columbia River. U.S. Dept. of Commerce, NOAA Tech. Memo., NMFS-NWFSC-18, 21 p.
Gessel, M. H., B. P. Sandford, D. B. Dey. 1994. Studies to evaluate the effectiveness of extended-length screens at Little Goose Dam, 1993. Report to the U.S. Army Corps of Engineers, Delivery Order E86920164, 42 p.
Williams, J. G., M. H. Gessel. 1994. Fish diversion and screening devices: Is there a relationship to fish behavior? Pages 135-140 in Proceedings of the Symposium on Fish Passage Policy and Technology, 1-2 September 1993, Portland, OR. Am. Fish Soc., Bioeng. Sec, Bethesda, MD.
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1993
Gessel, M. H., W. D. Muir, B. P. Sandford, D. B. Dey. 1993. Evaluation of the new juvenile salmonid bypass system at Lower Monumental Dam, 1992. Report to the U.S. Army Corps of Engineers, Contract E86920053, 23 p.
McComas, R. L., D. A. Brege, W. D. Muir, B. P. Sandford, D. B. Dey. 1993. Studies to determine the effectiveness of extended-length submersible bar screens at McNary Dam, 1992. Report to the U.S. Army Corp of Engineers, Delivery Order E86910060, 85 p.
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1991
Gessel, M. H., J. G. Williams, D. A. Brege, R. Krcma, D. R. Chambers. 1991. Juvenile salmonid guidance at the Bonneville Dam Second Powerhouse, Columbia River, 1983-1989. North American Journal of Fisheries Management, 11:400-412.
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1990
Gessel, M. H., D. A. Brege, B. H. Monk, J. G. Williams. 1990. Continued studies to evaluate the juvenile bypass systems at Bonneville Dam - 1989. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Science Center to the U.S. Army Corps of Engineers, Portland District, Seattle, WA, Contract DACW77-88-F-9999, 34 p.
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1989
Gessel, M. H., B. H. Monk, D. A. Brege, J. G. Williams. 1989. Fish guidance efficiency studies at Bonneville First and Second Powerhouses, 1988. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Science Center to the U.S. Army Corps of Engineers, Seattle, WA, Delivery Order DACW57-87-F-0322, 36 p.
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1988
Gessel, M. H., B. H. Monk, J. G. Williams. 1988. Evaluation of the juvenile fish collection and bypass systems at Bonneville Dam - 1987. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Science Center to the U.S. Army Corps of Engineers, Contract DACW57-87-F-0322, 131 p.
Williams, J. G., M. H. Gessel, D. R. Chambers. 1988. Juvenile salmonid bypass system research at Bonneville Second Powerhouse, Columbia River. Pages [1-41]-[1-54] in Proceedings: Fish protection at steam and hydroelectric power plants. Electric Power Research Institute, Palo Alto, CA.
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1987
Gessel, M. H., L. G. Gilbreath, W. D. Muir, B. H. Monk, R. Krcma. 1987. Evaluation of the juvenile salmonid collection and bypass systems at Bonneville Dam - 1986. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-86-F-0270, 53 p.
Monk, B. H., W. D. Muir, M. H. Gessel. 1987. Studies to evaluate alternative methods of bypassing juvenile fish at the Dalles Dam, 1986. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-85-H-0295, 16 p.
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1986
Gessel, M. H., L. G. Gilbreath, W. D. Muir, R. Krcma. 1986. Evaluation of the juvenile collection and bypass systems at Bonneville Dam - 1985. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-85-H-0001, 63 p.
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1985
Gessel, M. H., R. Krcma, W. D. Muir, C. S. McCutcheon, L. G. Gilbreath, B. H. Monk. 1985. Evaluation of the juvenile collection and bypass system at Bonneville Dam, 1984. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-84-F-0181, 48 p.
Gessel, M. H., W. Farr, C. Long. 1985. Underwater separation of juvenile salmonids by size. Marine Fisheries Review, 47(3):38-42.
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1984
Krcma, R., M. H. Gessel, W. D. Muir, C. S. McCutcheon, L. G. Gilbreath, B. H. Monk. 1984. Evaluation of the juvenile collection and bypass system at Bonneville Dam - 1983. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-83-F-0315, 56 p.
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1983
Krcma, R., M. H. Gessel, F. J. Ossiander. 1983. Research at McNary Dam to develop and implement a fingerling protection system for John Day Dam. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-82-F-0373, 24, 3, 5 p.
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1982
Krcma, R., D. DeHart, M. H. Gessel, C. Long, C. W. Sims. 1982. Evaluation of submersible traveling screens, passage of juvenile salmonids through the ice and trash sluiceway, and cycling of gatewell orifice operation at the Bonneville Dam First Powerhouse, 1981. Report by Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Center to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-81-F-0343, 36, [25] p.
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1979
Krcma, R., C. Long, C. Thompson, W. Farr, T. W. Newcomb, M. H. Gessel. 1979. The development of an improved fingerling protection system for low head dams, 1978. Report by Northwest and Alaska Fisheries Center, Coastal Zone and Estuarine Studies Division to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-79-F-0163, 40 p.
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1978
Ruehle, T. E., C. Long, M. H. Gessel. 1978. Laboratory studies of a nontraveling bar screen for guiding juvenile salmonids out of turbine intakes. Report by Northwest and Alaska Fisheries Science Center, Division of Coastal Zone and Estuarine Studies to the U.S. Army Corps of Engineers, Seattle, WA, Contract DACW57-77-F-0071, 14 p.
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