The subject of the contract is the planning of civil engineering structures and the structural design in the context of the construction of a new combined sewer DN1600 in underground tunnelling between the existing culvert head north of the Rhine-Herne Canal and the existing shaft S.002. The length of the new transport canal to be built is approx. 210 m. The planned starting pit for tunnelling is to be secured with a bored pile wall. The inner diameter of the starting pit is 7.80 m, the depth approx. 5.14 m

• Civil engineering structures - HOAI § 43 or Annex 12, phases 4 - 9; Basic services including additional special services (in particular on-site construction supervision).

• Structural design - HOAI § 51 or Annex 14, Lph 3 – 6, basic services incl. supplementary special services