Introduction: "The 790 MW Yeywa Hydropower Project is located on the Myitinge River (lower reach of Nam Tu River), approximately 50 km southeast of Mandalay in central Myanmar. The project comprises principally of a 134m high roller compacted concrete dam (RCCD) with a 790 MW power station located on the left bank at the foot of the dam and an ungated spillway located in the central section of the dam for flood water discharges. Two concrete lined river diversion tunnels are located in the right bank, one of these being subsequently converted into a bottom outlet enabling reservoir drawdown and control on reservoir filling, maintaining of riparian flows to the river downstream during the impounding period and in the emergency case of all turbines being closed down." .... Technical data, with maps, plans, photos.