United States Department of Transportation
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Trapping and Transportation of Adult and Juvenile Salmon in the Lower Umatilla River in Northeast Oregon, 1995–1996 – Umatilla River Basin Trap and Haul Program. Annual Progress Report, October 1995–September 1996
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1996-09-01
[PDF-439.67 KB]
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Edition:Annual Progress Report
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Abstract:Threemile Falls Dam (Threemile Dam), located near the town of Umatilla, is the major collection and counting point for adult salmonids returning to the Umatilla River. Returning salmon and steelhead were collected at Threemile Dam from September 5, 1995 to July 1, 1996. A total of 2,081 summer steelhead (Oncorhvnchus mvkiss); 603 adult, 288 jack, and 338 subjack fall chinook (0. tshawvtscha); 946 adult and 53 jack coho (0. kisutch); and 2,152 adult and 121 jack spring chinook (0. tshawvtscha) were collected. All fish were trapped at the east bank facility. Of the fish collected, 434 summer steelhead; 16 adult and four jack coho fall chinook; one adult coho and 2,114 adult and 82 jack spring chinook were hauled upstream from Threemile Dam. There were 1,433 summer steelhead; 499 adult, 251 jack and 264 fall chinook: 104 adult and 34 jack and 20 adult spring chinook released at Threemile Dam. In addition, 841 adult and 19 jack and 133 summer steelhead were hauled to Minthorn for brood. The Westland Canal juvenile facility (Westland), located near the town of Echo at river-mile (RM) 27, is the major collection point for out migrating juvenile salmonids and steelhead kelts. The canal was open for a total of 223 days between December 5, 1995 and August 9, 1996. During that period, fish were bypassed back to the river 126 days and were trapped on 62 days. Neither the trap or bypass were operated the remaining 35 days. An estimated 8,715 pounds of juvenile fish were transported from Westland to the Umatilla River boat ramp (RM 0.5). Approximately 94% of the juveniles transported this year were salmonids. No steelhead kelts were hauled from Westland this year. The Threemile Dam west bank juvenile bypass was operated from September 8 to October 13, 1995 and from March 18 to June 30, 1996. The juvenile trap was operated from July 1 to July 11. Daily operations at the facility were conducted by the ODFW Fish Passage Research project to monitor juvenile outmigration.
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