
A fish screen is designed to prevent fish from swimming or being drawn into an aqueduct, cooling water intake, dam or other diversion on a river, lake or waterway where water is taken for human use. They are intended to supply debris-free water without harming aquatic life. Fish screens are typically installed to protect endangered species of fish...
Found on
http://en.wikipedia.org/wiki/Fish_screen

A screen across the turbine intake of a dam, designed to divert the fish into the bypass system.
Found on
http://www.encyclo.co.uk/local/21804
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