Description: Natural barriers such as waterfalls and rockslides and artificial ones such as dams can prevent salmon from reaching their spawning grounds. At Hell's Gate on the Fraser River, extensive fishway ladder systems were built to overcome a natural barrier. Location: Canada Date: 1963 canada, americas

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Size: 2505px × 1995px
Photo credit: © piemags/AN24 / Alamy / Afripics
License: Licensed
Model Released: No

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