Water level reduction and management at Zechau III and Haselbach I in 2027, with an option to continue in 2028

Summary

The procurement covers water level management at the Zechau III and Haselbach I water bodies in 2027, with an option to continue in 2028. At Zechau III, the water level must be lowered using the existing floating pumping station to +177.0 m NHN, ensuring year-round that it does not exceed +178.5 m NHN and that the rate of drawdown does not exceed 1.0 cm per day. At Haselbach I, the water level must be lowered using a temporary off-grid pumping station to at least +146.4 m NHN and kept below +146.9 m NHN; weather conditions may interrupt pumping during winter. The work also includes maintaining the water management system, banks, pontoon, drainage ditches, water bodies, access roads and service roads, including vegetation clearance, mowing and keeping routes passable.