Rio Tinto reaches power deal for Oyu Tolgoi

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The world’s second largest miner Rio Tinto (ASX, LON, NYSE: RIO) has reached an agreement with Mongolia regarding the construction of a power plant to supply the giant Oyu Tolgoi copper and gold mine, located in the Gobi Desert. 

The new deal is a revision of the original power source framework agreement (PSFA) signed in 2018. It states that Rio, its subsidiary Turquoise Hill Resources (TSX, NYSE:TRQ) and the Mongolian government will work towards finding a permanent power supply solution by the end of March 2021.

Coal-fired plant is expected to come on stream within the next four years.

The notice confirms that Rio will not have to build its own 300 MW coal power plant, which it had earlier estimated could cost $924 million. Instead, is the government which will begin construction of a coal-fired power plant by July 2021.

The plant is expected to come on stream within the next four years. Until then, power supply to the mine and the underground project, which is sourced from China, will continue under the current terms, Rio said.

The massive Oyu Tolgoi deposit was discovered in Mongolia’s southern desert in 2001. Rio Tinto gained control of it in 2012, with the government of Mongolia retaining one-third ownership of the asset.

Canada’s Turquoise Hill, the Rio-controlled company that owns 66% of Oyu Tolgoi, is spearheading an ongoing underground expansion, which has faced multiple delays and costs blowouts.

Rio Tinto and Turquoise had estimated a cost overrun at the project of up to $1.9 billion due to difficult geology, saying total capital expenditure was expected to be in a range of $6.5 billion-$7.2 billion.

The cost of building a power plant was expected to come on top of that figure.

The companies also warned of further delays of up to two and a half years, with first sustainable production expected between May 2022 and June 2023.

The project is expected to lift production from 125,000–150,000 tonnes in 2019 to 560,000 tonnes at peak output, targeted for 2025. This would make it the biggest new copper mine to come on stream in several years.

Oyu Tolgoi produced 35,203 tonnes of copper and 26,154 ounces of gold in the first three months of this year, on track to achieve 2020 production guidance. The coronavirus pandemic, however, has caused operation to slow down since.