fish ladder

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July 23, 2026

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A fish ladder, also known as a salmon ladder, is a structure designed to help fish migrate upstream over obstacles like dams. It consists of a series of pools arranged like steps. This allows fish to navigate past the dam and continue their journey upstream. The term "salmon ladder" is a variation, and other terms like "salmon leap" or "salmon stair" are also used. These structures have been in use since at least 1855.12

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Fish passes
…usually take the form of fish ladders and fish locks. A fish ladder is utilized at Pitlochry Dam in Scotland; it consists of a series of stepped pools through which water is continuously discharged during the migratory seasons. The individual pools may be separated by a series of low weirs…
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…usually take the form of fish ladders and fish locks. A fish ladder is utilized at Pitlochry Dam in Scotland; it consists of a series of stepped pools through which water is continuously discharged during the migratory seasons. The individual pools may be separated by a series of low weirs…
Read More