The relief tunnel for the B2 will be built in Starnberg in the next few years. In the course of the structural preparatory work for the new tunnel construction, crossing media terraces are to be laid in such a way that the tunnel construction can be carried out as planned. The Starnberger See wastewater association, as the divisional arm for the wastewater treatment plants, was requested by the Weilheim state building authority to lay its crossing channels for waste water and rainwater accordingly. The scope of the construction measures resulting from the planned new tunnel construction for the Starnberger See wastewater association was discussed in the course of an upstream requirements planning in coordination with the project developer of the tunnel construction project. The result was 3 lots. The subject of this procurement for lot 3 is the required engineering services in the engineering profile according to § 43 HOAI for the laying of the channels in the area of the north portal (part 2).

The relief tunnel for the B2 will be built in Starnberg in the next few years. In the course of the structural preparatory work for the new tunnel construction, crossing media terraces are to be laid in such a way that the tunnel construction can be carried out as planned. The Starnberger See wastewater association, as the divisional arm for the wastewater treatment plants, was requested by the Weilheim state building authority to lay its crossing channels for waste water and rainwater accordingly. For this purpose, the Starnberger See wastewater association has already been given milestone dates in the years 2021 to 2022, for which the relocations are to be completed. The scope of the construction measures resulting from the planned new tunnel construction for the Starnberger See wastewater association was discussed in the course of an upstream requirements planning in coordination with the project developer of the tunnel construction project. The result was 3 lots. In addition, possible routes were suggested. These are attached to the tender documents. In addition to the sewers of the Starnberger See sewage association, private house connections are also affected, which also need to be adjusted. In addition, interim measures will be required during the relocation of the channels, which must also be integrated into the entire package of measures. The tunnel drainage is planned by the State Building Office Weilheim.

The subject of this award procedure is the tender for Lot 3 - North Portal (Part 2):

At the north portal, the sewage canal coming from the southern Leutstettener Straße (DN250) from the intersection Leutstettener Straße / Münchner Straße (B2) must be laid. Due to the slight overlap of the future tunnel, this area will be built in open construction by the State Building Office. The constructional drainage protection should be carried out via a pressure line with a connection in the northern Leutstettener Straße. The B2 has to be crossed. The latest planning by the State Building Office provides for a very small division area, so that the disposal of southern Leutstettener Strasse should be checked as part of the property planning via a permanent pump station. In the course of the renovation work in the area of southern Leutstettener Straße, a new connection line and a new house connection inspection shaft are to be built on the Leutstettener Straße 15 and Leutstettener Straße 20 properties. On the north side of the B2, a rainwater sewer DN600 is separated by the construction of the tunnel. To ensure the discharge, a new approx. 285 m long canal is to be built in the northern Leutstettener Straße. The existing attitude should be intercepted. In the northern Leutstettener Straße the existing rain water canal DN200 has to be enlarged to the necessary dimension. The connection is made in the intersection of Himbselstraße and Leutstettener Straße. Furthermore, a hydraulic calculation according to manual 10 of the AG - "Hydraulic dimensioning of the rain water sewerage (NW) at the Starnberger See waste water association" must be carried out as part of the object planning.

The order consists of the basic services for the specialist planning of engineering structures for plants and structures for wastewater disposal (Section 41 No. 2 HOAI), service phases 1 to 9 according to Section 43 (1) HOAI. The following special services are also offered:

- Detailed, cross-object, integrated planning of the construction process, especially considering the construction process of the tunnel project and the resulting changed road layout,

- detailed planning of construction phases,

- local construction supervision (note: a daily presence for local construction supervision is required),

- examination of the supplementary offers of the construction companies,

- drawing up an inventory plan,

- cost control,

- Monitoring the elimination of defects within the limitation period.