Wikipedia
SIDOR
Siderúrgica de Orinoco C.A. " Alfredo Maneiro" (Sidor) is the biggest Venezuelan steel corporation. The company is situated in an industrial zone in Ciudad Guayana, Bolívar State, near the Orinoco River.
Major iron deposits were found in the area in 1926 and 1947. Mining companies constructed rail infrastructure to take iron ore to ports on the Orinoco river. The Sidor plant was designed to make use of hydro-electricity from the Caroni, a tributary of the Orinoco, to process iron ore which had been hitherto exported.