The dam of the water reservoir is straight, rock-filled with medium earth padding. The reservoir is 469.7 m long in its crown, 10 m wide and the maximum height of the reservoir above the terrain is 47.2 m. The total flooded area amounts to 361.96 hectares with a total volume of 54.690 m3. In its deepest point the reservoir is 50 m deep. The main purpose of the reservoir is to accumulate water, providing a source of drinking water for the North Czech brown coal basin. It should also improve the flow of the Přísečnice and it should protect the local area from flooding. Last but not least, the water drives the electric power station in Hradiště and the small water power station in Přísečnice.

Near the reservoir there are several protected areas: Ptačí oblast (Bird Area) in the Eastern Krušné Mountains and Novodomské moorland - Kovářská, a locality in the Eastern Krušnohoří area which is of European importance.