Scotland’s Galloway Hydro Scheme was designed and built during the 1930s. It is a complex development with eight dams and five (later six) power stations interlinked by a network of pipes, tunnels and aqueducts. The scheme represents the state-of-the-art of hydropower design for its time and remains an engineering showpiece. A number of issues were raised at the design phase of the development. These included cultural heritage, impacts on industries using the same water resource, fish passage (particularly salmon) and the preservation of the fishing industry based thereon.