Muela_Dam=The Muela Dam is a double curvature concrete arch dam with a height of 55m. The Lesotho Highlands Water Project is primarily a water transfer system.  At Muela Dam the water en route to South Africa passes through an underground hydroelectric power station that generates electricity to supply the needs of Lesotho. Before the station was built, electricity had to be bought from South Africa. 
Image: Lesotho Water Commission