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Water is fundamental to our business. So it’s our responsibility to ensure that, within the regions that we operate, disruption to local water supply is minimal.

And our investment of over $100m to build the Mantoverde desalination plant in Chile, inaugurated on 13 November, demonstrates that.

The first of its kind in the country for Anglo American, the plant frees the Mantoverde copper mine from using the freshwater of the river Copiapó, the main water supply for local residents of the Atacama region.

Chile’s Mining Minister Aurora Williams was present at the inauguration, as were representatives of the local authorities and fishery unions.

Manotoverde
 The inauguration of Mantoverde’s desalination plant is great news. Not only because it demonstrates our continuous commitment to developing and using technologies that optimise our processes in a social and environmentally-friendly way, but also because it means great gains in the usage of water resources in a hydro-stressed region such as the Atacama.

Giancarlo Bruno Head of Operations

The desalination process

How exactly does Mantoverde’s desalination plant work?

Seawater is captured in a catchment tower, located 300 metres from the seashore, where it begins a filtration and purification process that extracts residue and salt.

This water can then be utilized by the Mantoverde operation, which comprises an open pit mine, crushing plants and facilities for processing oxide ores.

During the water treatment, all emissions are highly controlled. Natural elements, such as salt, that are extracted from the sea water to transform it into fresh, neutral and clean water during the desalination process are returned and dispersed in the sea.

Safety, efficiency and partnership

During the construction phase of the project, 20 months were recorded with no lost-time incidents while the final Lost Time Injury Frequency Rate (LTIFR) was 0.18, which places the project amongst the safest in the Chilean mining industry.

The desalination plant consumes up to 30% less energy than equivalent plants worldwide, and has been conceived and designed with respect and protection for the environment at the forefront.

And that was achieved by establishing a permanent dialogue with surrounding communities.

We worked together with representatives of six unions of the Unión de Trabajadores Independientes del Mar (Independent Unions of Seafarers) of Chañaral. This constant and direct communication with local communities has also opened doors for future projects in the region using similar technologies.

John Norrish, the desalination plant´s Project Manager said: “The success of this project consisted not only in delivering a world class desalination facility. It was also based on our focus on safety, meeting environmental commitments, and building sustainable relationships with the authorities, local communities and fishermen through formal dialogue and open engagement processes.”

Daniela Araya, Environment Advisor for the project agreed that partnership was key to Mantoverde’s success.

“The relationship with communities was outstanding. To achieve this there has been a constant work throughout the time of construction of the plant.”

The completion of Mantoverde’s desalination plant is part of a company-wide effort to conduct responsible water stewardship in all our countries of operation.

Every Anglo American operation works towards a water reduction target that was determined in 2011 using our water-efficiency target tool (WETT). It forecasts the projected business-as-usual demand of individual operations and also registers water-savings projects.

By the end of 2013, we had achieved an estimated 22% saving against our projected water usage.

And that’s why the Mantoverde desalination plant is so important.

It demonstrates how local partnerships and collaboration can be key to effective water management, keeping communities healthy and maintaining the harmony of the local ecosystem.

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