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Swim-Thru Fishway:

A simple, natural way for fish to migrate upstream by

swimming past dams, culverts, waterfalls and other obstructions.


              • keep migrating fish safe from predators
              • can allow viewing, counting and monitoring
              • a hassle-free alternative to trucking fish around obstructions
              • allow construction to continue safely during migration - units are portable
              • a natural, effortless contrast to the struggle of fish ladders
              • can be built to penetrate or bypass obstructions
              • select test sites sought


Swim-Thru Fishway diagram

Simplified Diagram of Rotary Valve Assembly

[view alternate valve assembly]



Note: This basic fishway system can also be used for

fish passage obstructions created by culverts and waterfalls.

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