The river Limmat in Dietikon is habitat to more than 20 different fish species. Free migration of fish is crucial for the sustainable fostering of aquatic fauna diversity.
In autumn 2017, the Canton of Zurich granted the building permit for the renewal of the concession for the historic Dietikon diversion power plant for another 60 years. The requirement for free fish migration was a major planning challenge for Lombardi.
As the Overall Planner, Lombardi was responsible for the conversion of the main power plant, for the construction of the new ecological discharge power plant and for compliance with the environmental requirements.
Since autumn 2019, the restructured Dietikon main power plant and the new ecological discharge power plant have been generating around 20 million kilowatt hours of electricity per year, enough to supply 4500 households with renewable energy. The restructured power plant delivers about 18 percent more renewable electricity. The built-in 200-square-metre trash rack with horizontal bars, serving the fishway, one of the largest in the German-speaking region, guides fish past the turbines to the bypass. A bar spacing of only 2 cm prevents smaller fish from getting caught in the turbine.
The Dietikon Project is a prime example of how investments in increasing renewable electricity production help generate living spaces with ecologically improved quality of life that have positive and sustainable effects on people, on animals and nature.