Hydroelectric power station, Scotland. This is the Rannoch hydroelectric power station. It is part of the Tummel hydroelectric power scheme, which consists of a series of nine hydroelectric power stations on lochs throughout the Tummel valley in Scotland. The area receives heavy rainfall, which flows down the valley and through the power stations, driving turbines that generate electricity. The Rannoch power station, on the northern shore of Loch Rannoch, is the most powerful in the scheme, and can generate 44 megawatts of power. The power stations in Tummel were built between 1930 and 1962. Photographed in January 2006.