The SBB pumped-storage plant exploits the gradient between Lake Sihl and Lake Zurich (Obersee). In the context of the licence renewal, comprehensive expansion and construction work on the power plant facilities is planned. Various options and variants are being examined. In addition, flood protection for the river Sihl and the diversion of the river Alp are also being taken into consideration.
In an engineering syndicate: overall planner for construction and technology, preliminary project, licensing dossier.
Swiss Federal Railways, SBB Energy
