Se San Hydropower plant No.4 with 3 units and total productivity of 360 MW is planned to generate power in June 2009. Now, the construction work has been being completed. In the closing period of construction, energy section, an important work item, is being executed. That item includes 2 dams, which will be 173 m high in right side and 170 m high in left side. They now have reached the height of 124m owing to the application of roller-compacted concrete.