The scheme makes use of the roughly 3.5m height difference created by Radyr Weir to push water through two 4-metre-wide (13 ft), 10-metre-long (33 ft) Archimedes screw turbines.[2]
The scheme was constructed in 2015 by Dawnus, being designed by Renewables First and operated by Cardiff Council.[1][2]
During construction a temporary fish ladder was installed as construction work was likely to coincide with the peak of the upstream migration of salmon.[1]
Cardiff Council built the scheme to supply renewable electricity to 550 homes as part of a commitment to lower carbon emissions and help Cardiff become a "one planet city" by 2050.[2][3]