Flood-control reservoir Lichnov III

Investor: Povodí Odry, státní podnik
Locality: The area of interest is located in the Moravian-Silesian Region, in the cadastral area of Lichnov. The dam profile of the designed basin is located west of the municipality of Lichnov, approximately 400 m from the border of a built-up area. It is located on the Tetřevský stream upstream the confluence with the Čižina, which is a tributary of the Opava river.

This locality is part of the Baltic Sea drainage area, the Odra river basin. The Flood-control reservoir is designed to retain floods caused by local heavy rainfall. It concerns reduction of flood-level flows, limiting the sediment movement and protection of the built-up part of the Lichnov municipality against the adverse effects of flood flow rates.

The Flood-control reservoir Lichnov III is homogeneous, of trapezoidal cross-section, horizontal, with a curved axis, 235 m long and 4 m wide at the crest level. Soil needed to construct the dam was extracted from a borrow pit located  in the area of future backwater and in its surroundings. The safety and discharge system  is a combined structure consisting of an inlet with a gate, safety overspill shaft and a waste passage. Water is conveyed from the basin dam via an open waste trough into the existing channel.