The dam creates the iconic Castlereigh Reservoir, which is almost entirely maintained by the inflow of water from the Kehalgamu Oya. Water from the reservoir is diverted to the Wimalasurendra Power Station, located approximately 12 km (7.5 mi) further downstream at 06°54′31″N 80°31′30″E, near Norton Bridge. The power station discharges the water into the Norton Reservoir, created by the Norton Dam, located at the same sitThe dam creates the iconic Castlereigh Reservoir, which is almost entirely maintained by the inflow of water from the Kehalgamu Oya. Water from the reservoir is diverted to the Wimalasurendra Power Station, located approximately 12 km (7.5 mi) further downstream at 06°54′31″N 80°31′30″E, nee.[1]