Fish passes have been built on five weirs in Sheffield – Brightside, Norfolk Bridge, Lady’s Bridge, Kelham Island and Steelbank, reconnecting 6.5km of the Don and opening up 10km of spawning grounds to migratory fish for the first time in 200 years. Within a year of the project’s completion Atlantic salmon (Salmo salar) were sighted above all the weirs. In 2025, the first wild born Salmon parr in over 200 years was found in the River Don!