Table 1: Key parameters of the staged development of the Rogun project Parameter Stage 1 Stage 2 Stage 3 Dam height (m) 225 285 335 Full supply level (el. m) 1180 1240 1290 Minimum operating level (el. m) 1120 1180 1230 Initial reservoir volume (km³) 2.78 6.76 13.3 Initial life storage volume (km³) 1.92 3.98 10.3 Total installed capacity (MW) 1200 2400 3600 Number of turbine units installed 3 4 6 Average generation (TWh/yr) 6.7 11.6 14.5 Additional generation by the d/s cascade (TWh/yr) 0.4 0.9 1.2