Engineering project competition for Sihlsteg Spinning Mill site in Langnau

To protect the city of Zurich from flooding, the canton of Zurich is planning to construct a spillway tunnel from the Sihl River to Lake Zurich. Given that the spillway will have a significant impact on the environment, its construction will require compensatory measures. Among these measures, the city is planning to eliminate a footpath along the eastern shore of the Sihl and to erect a new pedestrian bridge as a replacement.

The technical, design, and ecological specifications are expected to elicit a wide range of solutions. EBP will help the developer to manage the project competition within the framework of a two-stage, selective procedure.