The Environment Agency’s hydro power potential Site Net head Design flow rate Max power Annual energy Allington Lock 3.8-4.5m 11m3/sec 233kW 510,270kWh Hampstead Lock/Weir 2.8m 9m3/sec 141kW 620,000kWh Leigh Barrier 3m 4m3/sec 67kW 290,000kWh Sluice Weir 2.7m 7m3/sec 107kW 470,000kWh SOURCE: Creative Environmental Networks (CEN)