. Commercial fisheries review. Fisheries; Fish trade. Fig. 2 - Experimental submerged port (6-inch diameter) in- stalled at McNary Dam by the Army Corps of Engineers. It passes fingerlings from one of the 44 intake gatewells into the ice sluice for transport around the turbines. sections of the dam. Future research must determine where fish should be released in the tailrace to minimize predation, whether predation is reduced when fish are released only at night, and whether the spilling of wa- ter through a spillway gate near the release site reduces predation. From these and sim- ilar s
. Commercial fisheries review. Fisheries; Fish trade. Fig. 2 - Experimental submerged port (6-inch diameter) in- stalled at McNary Dam by the Army Corps of Engineers. It passes fingerlings from one of the 44 intake gatewells into the ice sluice for transport around the turbines. sections of the dam. Future research must determine where fish should be released in the tailrace to minimize predation, whether predation is reduced when fish are released only at night, and whether the spilling of wa- ter through a spillway gate near the release site reduces predation. From these and sim- ilar studies, BCF and the Corps can develop a system that will provide juvenile migrating fish with best possible protection at mini- mum Fig. 3 - The ice sluice, used for transporting young fish around the turbines, discharges the fish in the tailrace about 120 feet downstream from McNary Dam. The Corps of Engineers has provided BCF with funds to accelerate the development of this fish-bypass system. Moreover, the Corps already has equipped all 44 gatewells at McNary Dam with submerged ports. Re- search on these ports and on other aspects of bypassing fish are Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service; U. S. Fish and Wildlife Service; United States. Bureau of Commericial Fisheries. [Washington] : National Marine Fisheries Service; [for sale by the Supt. of Docs. , U. S. Govt. Print. Off. ]
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