Winchester: No Dam Reason

By: Tim Vandehey, Jeff Dean & Morgan Krakow

A fish ladder acts as a detour for fish to migrate around an impediment in the water such as a dam. The Winchester fish ladder has a series of shallow pools that ascend the height of the dam. The fish leap from pool to pool and rest in between jumps. This fish ladder has two entrances, low and high flow, for fish to use depending on the seasons and height of the river.



Each fish ladder has to be tailored to the type of fish that will be using it, some fish ladders can be steep and have a fast current whereas other types of ladders are less challenging to go up. Fish ladders are not 100% effective and can sometimes slow down migration upstream. The log deflector directs the flow of water down the dam.


Illustration by: Anna Rath