Orco

For other uses, see Orco (disambiguation).
Orco

The Orco near Rivarolo Canavese

Orco location within northern Italy
Basin
Main source Gran Paradiso
Source elevation about 2,600 m (8,500 ft)
River mouth Po at Chivasso
Size 889.4 km2 (343.4 sq mi)[1]
Country Italy
Physiognomy
Length 89.568 km (55.655 mi)[2]
Tributaries
  • Left
  • Piantonetto, Eugio, Ribordone, Soana, Piova, Malesina
  • Right
  • Gallenca

The Orco (Piedmontese: Eva d'òr, that is lit. Water of gold; Latin: Orgus[3]) is an Italian river. It originates in the Piedmontese slopes of Gran Paradiso and after about 90 kilometres (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.[4]

Notes

  1. Autorità di bacino del fiume Po
  2. Naturalis historia liber III - 118, Pliny the Elder, 77 d.C.
  3. Oro nel fiume Orco a Feletto, www.minieredoro.it (accessdate: 7-6-2012)

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Coordinates: 45°10′N 7°52′E / 45.167°N 7.867°E / 45.167; 7.867

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