|Data on the structure|
|Lock type:||Pier dam|
|Height above valley floor:||49.46 m|
|Height above foundation level :||56 m|
|Height of the structure crown:||739.31 m|
|Crown length:||459 m|
|Crown width:||8 m|
|Operator:||State enterprise Povodí Ohře|
|Data on the reservoir|
|Altitude (at congestion destination )||737.06 m|
|Water surface||153 hectares|
|Storage space||21.6 million m³|
|Total storage space :||23.1 million m³|
|Catchment area||43.13 km²|
|Design flood :||51 m³ / s|
The only pier dam in the Czech Republic was completed in 1963. The dam is used as a drinking water reservoir for the Most district . The dam is 56 m high and 416 m (with the "dam crest" (crown structure?) 459 m) long. The reservoir of the Fláje dam covers an area of 153 hectares. The water is dammed from a catchment area of approx. 43 km².
During the construction of the dam, the place Fláje ("Fleyh") was flooded and the villages of Vilejšov , Oldříš , Mackov and Pastviny in the water catchment area were abandoned. In the storage area there is also the former branch of an old raft ditch from the Flöha, which lies dry here, reaches the Saxon area after a few kilometers and flows off to Clausnitz .
Because it is used as a drinking water reservoir, it cannot be used for recreational purposes. Entering the bank areas of the reservoir is prohibited.