| Summary: | EXPERTS AIDING FISH AT DAMS. EXPERTS AIDING FISH AT DAMS Construct Locks So Salmon Will Not Be Halted Along Columbia River. SEATTLE, May 27. (AP)-A “river within a river" together with huge fish locks-something almost entirely pew-will aid the great salmon run to pass the big Bonneville dam across the Columbia river. Barring their path to their fresh water spawning grounds possibly 1000 to 1200 miles or more from the Pacific, Uncle Sam is building two great barriers, the Bonneville and Grand Coulee dams. A salmon industry valued at $10,000,000 annually faces a grave problem. Fear Fate of Fish. Through the bureau of fisheries, however, the government is also taking steps-some of them admittedly experimental-to preserve the salmon runs. Some fishery enthusiasts have feared the fish might follow the fate of the salmon of north Atlantic coast river. Construction work on the big dam has barely gotten under way, but huge fish ladders, 50 or more of them, successive pools of water each a foot higher than the one below and with water flowing down over them, are already planned. Fish Locks Are New. The first units of a new "collecting system" to "corral" the fish into the mouths of the ladders are already being built, with one to run across the face of the power house already being laid out. Fish locks, which may be compared with canal ship locks, and which have only once been used before on a small scale in the middle west, are beyond the blue-print stage. Harlan B. Holmes, aquatic biologist for the bureau of fisheries and a Stanford man, who is acting as a consultant for the war department, the builder of the dam, explained the work here today. Milo Bell, representing the Washington state fish and game department, has acted in an engineering advisory capacity.
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