Fish ladders allow fish to migrate upstream past a dam or other barrier.
Dams tend to fragment aquatic ecosystems, however in the case of the sunshine reservoirs, they are off channel and do not affect the fivers ecosystem. If the ecosystem is fragmented, entire species of fish can be lost in a particular system.
No one fish ladder can accommodate every species of fish at a particular location so the ladder must be designed to meet the species needs. These needs can include barrier heights, water speed and size and spacing of pools.
Some of the types of ladders are shown below.
VERTICAL SLOT FISHWAY
The vertical slot fishway is effective for alot of species and is not effected by the upstream water level.
POOL - WEIR FISHWAY
The Pool-Weir fishway is one of the oldest types of fish ladders. This design works well for jumping species like trout and is effected by upstream water levels.
STEEPPASS FISHWAY
The Steeppass fishway uses a large number of baffles to simulate rapids. This type of ladder is effective for a large number of species and can handle a large range of upstream water elevations.
HAPPY FISH
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