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Educational trail Rozmberk Fishpond

Flood surge

One of the last constructions for the pond was the surge overflow. This overflow was made so that if the water reached a certain height at the dam, it would be diverted through the overflow. It kept the water from going over the top of the dam and destroy the dam from behind. The stone wall to the side of the overflow was built to ensure that the water would flow through the outlet away from the dam and not across the forests and fields behind it. Here you can also see the remainders of a bridge. This bridge was built in 1787 and it spanned almost 60 meters across the overflow outlet. In 1730, during heavy rains the ponds and floodplains flooded. The floodwaters even reached the town of Trebon. Local farmers had to evacuate and move with their livestock into Trebon. The overflow did its duty and Rozmberk dam held.

During the flooding in 1890, the dam of the pond Svet collapsed. The water this and three other ponds ran into the Rozmberk pond, together with the already extreme high natural inflow. However, the improved 88 meter wide overflow again worked as planned. Even then, the water stayed more than 5 meters under the top of the dam. The surrounding villages suffered much, but if the Rozmberk dam had broken, it would have caused a real catastrophe. The biggest test came in recent times.

In the 2002 flooding, the dam of the New River broke. In total, about 2,300 hectares of land and floodplains were under water. All this water ultimately collected in the Rozmberk pond. The water spilling over the surge overflow reached a height of almost three meters. However, the four-century-old dam passed this test as well.

GPS position

N 49° 3.284', E 14° 47.361'



Společnost Rožmberk o.p.s.
Olga Černá
Tel.:602 471 653