Covanta owns a 13 percent equity interest in a 500 metric tons per day, 18 megawatt mass-burn energy-from-waste project at Trezzo sull'Adda in the Lombardy Region of Italy which commenced operation in 2003. The remainder of the equity in the project is held by a subsidiary of Falck S.p.A. and the municipality of Trezzo sull'Adda. The project is operated by Ambiente 2000 S.r.l., an Italian special purpose limited liability company of which Covanta owns 40 percent. The solid waste supply for the project comes from municipalities and privately-owned waste haulers under long-term contracts. The electrical output from the Trezzo project is sold at governmentally established preferential rates under a long-term purchase contract to Italy's state-owned electricity grid operator, Gestore della Rete di Trasmissione Nazionale S.p.A.