On behalf of Energie Wasser Luzern (EWL), our company, Willy Stäubli Ing. AG, was able to construct a lake water collection pipeline from the Lucerne lake basin to the shore of Inseliquai.

The aim of the city of Lucerne is to switch from nuclear power to lake energy within the next 25 years. The first buildings are to be heated and cooled with water from Lake Lucerne as early as summer 2020.

Our construction work on the See-Energie grid began in November 2019 and was successfully completed at the end of May 2020. Our main tasks included floating in steel pipe strings with a diameter of 700 mm and lengths of between 5 and 64 meters. The pipe strings were then carefully lowered to the bottom of the lake and bolted together by our divers. At the end of the pipeline, a catchment structure was installed at a depth of around 30 meters. This serves to draw in the lake water and protect the pipeline from contamination and external influences. The total length of the steel pipeline is approx. 1,900 meters.

Although Willy Stäubli Ing. AG has already completed countless similar projects, each one is a unique challenge and requires meticulous planning and sophisticated logistics. On the construction site, we have always relied on well-coordinated and experienced employees. Working on the lake demands maximum concentration and every move must always be carried out with precision.

We would like to thank the client and the other companies involved in the project, as well as our employees, for their constructive cooperation.