Rhein Water for New Lakes: Pipeline Construction Begins - Germany's Rhineland mines will become a sprawling lake district by 2100

Germany's Rhineland lignite mining district is set for a dramatic transformation over the coming decades. Three major open-pit mines—Inden, Hambach, and Garzweiler—will close by 2033, making way for a vast new lake district. The project will see the pits flooded with water from the Rhine and Rur rivers, reshaping the landscape by the end of the century.

The first mine to shut will be Inden and Hambach in 2029, with Garzweiler following no later than 2033. Hambach will be filled first, starting immediately after closure, while Garzweiler's flooding begins in 2036. The entire process is expected to finish around 2070.

Water for Hambach and Garzweiler will come from the Rhine via a new underground pipeline. This system, due for completion by 2030, will include an intake facility, a pumping station, and a distribution hub. The pipeline itself will stretch for kilometres, made up of roughly 10,000 steel pipes with diameters of 7.2 and 4.6 feet.

Inden, meanwhile, will be filled by the Rur River starting in 2030. The flooding there is projected to take between 25 and 30 years. Once complete, the three resulting lakes—Inden Lake, Garzweiler Lake, and Hambach Lake—will form the Rhineland Lake District.

The project follows earlier examples in Germany, where former open-pit mines have been turned into artificial lakes. Regions like Leipziger Neuseenland and Geiseltalsee in central Germany have undergone similar transformations since the 1990s. The new lakes in the Rhineland are expected to boost local biodiversity, create recreational spaces, and support tourism and jobs.

However, the BUND NRW environmental group has raised concerns. They question whether extracting large volumes of water from the Rhine could cause ecological damage.

By the turn of the next century, the Rhineland's industrial past will give way to a network of lakes. The new district will cover areas once dominated by mining, offering fresh opportunities for nature and local communities. The success of the project will depend on balancing ecological risks with long-term benefits.