 The Three Gorges Dam reached its design @-@ maximum reservoir water level of 175 m ( 574 ft ) for the first time on October 26 , 2010 , in which the intended annual power @-@ generation capacity of 84 @.@ 7 TWh was realized . In 2012 , the dam 's 32 generating units generated a record 98 @.@ 1 TWh of electricity , which accounts for 14 % of China 's total hydro generation . 
