Smart Cistern Project in Hannover Halts After Severe House Damage

Prinzenstraße in Hannover faces severe damage to nearby houses, halting the construction of a large 'smart' cistern. This is the second major project to fail under Environment Commissioner Anja Ritschel (Greens), following a cancelled green hydrogen production project last year.

The damage includes cracks in foundation plates, moisture infiltration, and a sunken staircase. Residents voiced their concerns at a town hall meeting. The cause is being investigated, with old, improperly filled channels from the founding period suspected to have shifted due to vibrations. Despite this, plans for the above-ground redesign of Prinzenstraße will continue, but the completion date of 2028 is uncertain.

The cistern, intended to store rainwater for irrigation and prevent sewer overload, was funded by the federal government, state budget, and the city's own budget, initially set at 2.4 million and 2 million euros respectively. However, costs rose to around six million. Construction began in early September, causing vibrations that led to cracks in nearby houses. The city's wastewater department will cover initial damage analysis and stabilization costs, with the rest to be negotiated between insurance companies.

The halted construction of the 'smart' cistern on Prinzenstraße highlights the challenges of urban development projects. While the cause of the damage is still under investigation, the city remains committed to the Prinzenstraße redesign. The financial implications and insurance negotiations are ongoing.