fish ladder
Noun
Meaning
a series of ascending pools providing a passage for salmon to swim upstream past a dam
Source: WordNetSynonyms
Hypernyms
Examples
DUC built a 250-metre dike, converting the salt marsh into an artificial freshwater site, complete with a fish ladder, which allowed fish to access the habitat within the upper tributary.
An estimated 500 interlocking concrete blocks are being used in the construction of the fish ladder.
As of mid-August, the lake level was five inches below the spillway, due mostly to evaporation and seepage at the fish ladder.
The fish ladder at Sheepscot Pond is designed to use about 6 cubic feet per second.