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fish ladder

American  

noun

  1. a series of ascending pools constructed to enable salmon or other fish to swim upstream around or over a dam.


fish ladder British  

noun

  1. 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

Etymology

Origin of fish ladder

An Americanism dating back to 1860–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The coho salmon has already conquered the Ballard Locks fish ladder, swum 17 miles through urban Seattle waterways and powered through a tunnel under nine lanes of Interstate 405.

From Seattle Times • Mar. 10, 2024

Often adult Chinook salmon looking to spawn will cycle through the fish ladder multiple times or wait upstream for weeks, losing energy and risking attacks from predators, she said.

From Seattle Times • Feb. 18, 2024

If your idea of fish passage is the Ballard Locks fish ladder, think again.

From Seattle Times • May 17, 2023

About a dozen state and tribal workers have been stationed at the Locks fish ladder every day this past week, watching and waiting for the sockeye to return.

From Seattle Times • Jul. 2, 2022

Before the levee was removed, fish could bypass the embankment only through a fish ladder, a series of pools built to allow fish to swim over obstacles like dams.

From Seattle Times • Apr. 5, 2022

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