The main aim was to balance the discharge from the Orlík hydraulic power plant and its utilization for the generation of power in cooperation with other parts of the Vltava Cascade, by ensuring a minimum discharge of the Vltava river in Vrané nad Vltavou (40 cu metres per second).
During the floods in August 2002, the maximum permitted level in the Kamýk reservoir was exceeded by 1.55 m and the discharge was exceeded by more than 800 cu metres per second.
The higher discharge also caused damage to the bottom and end of the stilling basin. It was therefore necessary to carry out reconstruction of the stilling basin, including a concrete slab with the thickness of 1,2 m at the originally projected bottom level.
In addition, the end of the stilling basin was to be renovated at its original geometric shape.
The damaged dividing wall between the power plant and the stilling basin by the coffer was reconstructed with a layer of reinforced concrete anchored to the original construction.
A significant attention was given to the protection of the structure from increased flow rates. The protection has been assumed by the Orlík reservoir in which a free capacity was set up at the beginning of the construction to intercept any higher discharge.
The extreme drought in 2003 meant good conditions for the construction, and there were no problems encountered in the protection of the excavation pit. The construction was launched in May 2003 by filling the lower well, and all concrete work was completed in September 2003.
Subsequently, the well was removed and the work completed by the end of October 2003.
Information & Contact:
Ing. Jiří Stratílek
Ing. Jana Cernohorská
Povodí Vltavy, s.p.
Holeckova 8
150 24 Praha 5
tel: 00420 221 401425
fax: 00420 257 322 739
