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Chilean miner Collahuasi has withdrawn an environmental impact study (EIS) submitted on November 18 for a US$173mn water transfer system to supply its expansion project in northern region I, a source from the environment ministry's (MMA) evaluation service told BNamericas.
The EIS was undergoing the admissibility test and was expected to be rejected after failing to comply with certain formal requirements, the source said.
As a result, the company decided to anticipate the decision and withdrew the document in order to prepare an updated version of the EIS, the source added.
A pumping station in Lequena, located in region II's Calama district, was expected to transport 500l/s of untreated water from regional utility Aguas Antofagasta's network through a 98.5km pipeline to Ujina in region I's Pica district, where Collahuasi operates an open-pit mine.
The company also planned to build a transmission line between Ujina and Lequena to power the pumping system, according to the EIS.
Based on the withdrawn EIS, construction was scheduled to begin in November 2012 and take 17 months to complete. The system was expected to have a 25-year lifespan.
Collahuasi is jointly controlled by Swiss-based Xstrata (LSE: XTA) and London-based Anglo American (LSE: AAL), each with a 44% stake, while the remainder belongs to a group of Japanese companies led by Mitsui.