The River Dee, a Special Area of Conservation (SAC), needed restoring. Our expert team helped Natural Resources Wales by developing designs to improve connectivity for fish at six weirs, while also enhancing natural physical processes, features and habitats.
We surveyed each of the six weirs to establish the hydromorphology, water and sediment quality, contaminated land, ecology, heritage, topography, utilities, and a low flow hydraulic study. In addition, we undertook hydraulic modelling to inform outline design options. Through this holistic approach, we then assessed, identified, and designed solutions for fish passages, unique to each site.