The Orco (Eva 'òr, that is Water of gold in Piedmontese) is an Italian river. It originates in the glaciers of the Piedmontese slopes of Gran Paradiso, and after about 90 km (56 mi) reaches the Po River near Chivasso. Its drainage basin is home to the most important complex of hydropower in Piedmont, consisting of five dams: Agnel, Serrù, Ceresole, Piantonetto, Valsoera, and numerous turbines.