Word: tailfirst
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Dates: during 1930-1939
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...staircases installed at 170-foot Bonneville Dam for the convenience of fish. Object of the system is to enable Columbia River salmon to pursue their four-year life cycle: hatch in gravel beds in the river's upper tributaries, grow several inches, drift down to the ocean tailfirst, get to weigh anywhere from 10-to 60 lb., swim back up the Columbia River to spawn and die exactly where they started. The system, consists of 1) two separate "stairways" (of one-foot waterfalls separated by pools 16 ft. wide) for fish who feel like climbing to the headwaters under...
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