Photo Credit: Alex Mead
This is a fish ladder. It is used in conjunction with dams and weirs to allow migratory fish to pass around the main falls of the dam. It consists of small steps of waterfalls, one right after each other, so fish can make the jump from level to level getting up around the dam to continue their swim upstream. Without fish ladders many migratory fish couldn’t go up stream for spawning and the fish population would undoubtedly suffer.