The Hochwurtenspeicher is a reservoir with a storage target of 2,417 m above sea level. A. , which is located within the Goldberg Group in the Austrian municipality of Flattach . It has a storage volume of 13.15 hm³ and is located in the catchment area of the Fragantbach . The Hochwurtenspeicher is connected by a 1.6 km long pressure tunnel to the Großsee reservoir in the neighboring Zirknitztal , which is roughly the same size and at the same height . This allows the water level of the two reservoirs to be equalized according to the principle of communicating tubes .
The artificially created Hochwurtenspeicher was dammed for the first time from 1972 to 1974 with the construction of an earth embankment dam with a surface seal made of asphalt concrete and a 212 m long crown. At that time he had a storage target of 2405 m above sea level. A. and a net volume of 7.6 hm³. In the course of a second expansion phase from 1978 to 1980, the dam was raised by 12 meters, the crown being lengthened to 260 m. The Hochwurtenspeicher used in the power plant group Fragant the Kelag as an annual memory of the storage power plants Zirknitz (32 MW), Innerfragant (step Wurten, 66 MW) and Außerfragant (96 MW).
literature
Statistics 1977 of the large dams and river dams in Austria (= The dams of Austria . No.24 ). Austrian Reservoir Commission, Austrian Water Management Association, Austrian National Committee for Dams, Vienna 1977, ISBN 0-387-81461-2 , p.174-177 .
