Refurbishment of Rüchlig power station in Aarau
Axpo Power AG received a building permit for refurbishment of the existing Rüchlig hydropower plant in August 2011. Scheduled to resume operation in early 2015, the modernized plant will supply power to some 14,000 households. The upgrade will lift annual production from the present 55 to 64 GWh and the installed capacity from 9 to 11 MW. Axpo is also investing in a wide range of accompanying environmental measures and various flood control improvements.
The overall hydropower plant refurbishment includes the modernization of the structural fabric and electromechanical systems for the three existing pipe turbines plus the construction of a fourth, new machine assembly. The two-bay spillway for controlling the water flow in the River Aare is being erected immediately adjacent to the main powerhouse. An additional residual-flow powerhouse on the original river course will generate extra electricity and ensure an adequate flow of water through the floodplain areas. Further components include a new-build control center, a boat transfer system, two fish passes and a new weir bridge for access.