Orco

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Orco
The course of the Orco
The course of the Orco
Origin Gran Paradiso
Mouth Po at Chivasso
Basin countries Italy
Length 100 km
Source elevation c. 2.600 m
Avg. discharge 28 m³/s

The Orco (Eva d'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.

The Orco is known also for its gold-bearing sand, extracted already in antiquity. Even today there is a certain activity, on an amateur level, searching for grains of gold.