Cleaning of drainage systems on the A44 federal motorway in the Küchen, Hopfenberg, Walberg and Schulberg tunnels and in the Schürzenberg tunnel in the course of the B27 in the area of the East Hesse Operations Department 2021-2022.

- clean approx. 26 100 m slot channel,

- Clean approx. 554 pieces of immersion wall shafts,

- clean approx. 26 400 m of drainage pipes,

- Clean approx. 616 drainage shafts,

- clean approx. 28 800 m of Dainage,

- Empty and clean approx. 20 rain retention basins.