The L 333 in the Rhein-Sieg district between Hennef and Windeck is always prone to landslides. The object of the contract is the geotechnical recording and evaluation of the slope status as well as the assessment of the tree stock along the state road.

— identification of the vulnerable areas with regard to slope stability in the context of a geotechnical risk assessment, limiting the vulnerable areas, showing the necessary safeguards,

— Visual tree inspection according to tree inspection guidelines (FLL) /tree examination guidelines to determine the stability of the tree stock and create a catalog of measures,

— measurement of the vulnerable areas of investigation.