The Hydro takes the form of a 'reverse' Archimedes screw. (Whereas a classical Archimedes screw uses power to lift water upwards, here it is the movement of water downwards under gravity that creates the power.) The screw was installed in August 2008 to generate hydroelectric power for the local Co-op supermarket and for feeding into the National Grid. When working at full power it produces about 30-50kW. In April 2015 the total power generated since August 2008 reached 1,000,000kWh. The Hydro exploits the fall in water level created by the weir, originally built for the water-powered Torr Mill: a nice case of historical continuity.