An intake structure was built in Lake Lucerne which will in future serve as a decentralized heat treatment plant for the Horw and Kriens area.

In the years 2022 - 2025, several large developments are to be built in the Kriens and Horw region. The majority of these new buildings will be realized as so-called "2000-watt areas". This label demonstrates the focus on energy efficiency, renewable energy and climate friendliness.

This project focuses on the use of heat and cold from Lake Lucerne as a sensible supply concept. The concept provides for decentralized processing of the heat to the locally required temperature level. In this way, new buildings, existing buildings and renovations can be efficiently supplied with heat from the lake.

In collaboration with Schenk AG and a horizontal drilling machine, two boreholes were drilled in the lake, each 500m long. Plastic pipes (Ø DN 800mm and DN 700mm) were pulled into these boreholes. At the end of the intake line, the intake structure was placed at a water depth of 45m by our divers. At the end of the return line, the return structure was placed at a depth of 25m.

Our work at a glance:

• Dimensioning and production of the barrel structure
• Dimensioning and production of the return structure
• Recovery of drill rods from a depth of approx. 20m
• Floating in the plastic pipes
• Assistance in pulling pipes into boreholes
• Assembly of the intake structure at a depth of 45m
• Assembly of return structure at a depth of 25m