The Waitaki system Name Commissioned Generation(GWh/yr) Output(MW) Net head(m) Tekapo A 1951 160 25.5 30.5 Tekapo B 1977 833 160 145.7 Ohau A 1979 1140 264 59 Ohau B&C* 1984/5 958 212 47.5 Benmore 1965 2215 540 92 Aviemore 1968 942 220 37 Waitaki 1935-54 496 105 21.5 * Facts are the same for each station Ohau B&C