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fish ladder

a series of ascending pools constructed to enable salmon or other fish to swim upstream around or over a dam.
Origin of fish ladder
1860-65, Americanism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for fish ladder
  • The boat whips to the right, and the two gunmen in the bow take aim at a culprit near the south fish ladder entrance.
  • The hatchery has a fish ladder that the salmon go through to get to their final destination.
  • Salmon and steelhead jump over twenty steps to the top of the fish ladder.
  • The fish ladder design at this ladder is called vertical slot.
  • The barrier dam stretching across the river means the only way upstream is up the fish ladder.
  • The dam blocks fish from swimming upstream so they will turn and enter the concrete fish ladder to the left of the dam.
  • The ramps provide access to the viewing platform, viewing window, and the gathering tank at the top of the fish ladder.
  • He reports fish are consistently present, moving through the fish ladder and utilizing the created habitat.
  • Returning adult fish swim up the hatchery fish ladder directly into large holding ponds.
British Dictionary definitions for fish ladder

fish ladder

a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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