Three Gorges Dam calculated based on the average flow rate at the dam site, assuming the water level is 175 m and the plant gross efficiency is 90.15%. The actual power output in 2008 was obtained based on the monthly electricity sent to the grid. The Three Gorges Dam reached its design-maximum reservoir water level of 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. The State Grid Corporation
Panjiakou Dam seen on a small island off the reservoir's edge at , particularly during droughts when the reservoir holds less water. The scenery around the reservoir is a popular tourist destination and with the surrounding terrain, it is often called "Qianxi Little Three Gorges". The Panjiakou Dam is a tall and concrete gravity dam. The dam's reservoir has a capacity of and surface area of . Of the reservoir's capacity, is active (or "useful") for power generation and water supply. The dam sits at the head of a catchment area which constitutes 75 percent of the Luan River basin. The dam's