It is the largest Czech pond, and so is also called "South - Bohemian sea". His dam is 2430m long and 10m high and 55m wide heel. Crown width is 11m, covered with 150 to 400 years old oaks. The pond was originally an area of about 1060ha, flooded meadows at the edge of Trebon. But because fish thrive in rather shallow water. So it was decided to reduce the level. More information HERE.