For the B236 in Dortmund, a fundamental renewal is planned from km 7,600 to km 11,020 (north of the Dortmund-Wambel tunnel) in both directions.

In the course of the renovation, three retaining wall replacement buildings, eighteen bridge replacement buildings, replacement new buildings and/or repairs of noise protection walls, the new construction of four rain treatment plants (RWBA) and seventeen VZT traffic sign carriers / VZ bridges are planned. The subject of this invitation to tender is the preparation of soil surveys of the aforementioned civil engineering structures.

Preparation of ground surveys