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Northwest Territories

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Diavik comprises four diamond-bearing pipes that we mine using a combination of open pit and underground mining. The Diavik Diamond Mine is managed by Rio Tinto and is owned by a joint venture between Diavik Diamond Mines (2012) Inc., a wholly owned subsidiary of Rio Tinto (60% ownership) and Dominion Diamond Diavik Limited Partnership, a wholly owned subsidiary of Dominion Diamond Mines (40% ownership).

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The design, construction and operation of Diavik is a story of success on a grand scale, in part because it is in one of the most challenging environments in the world: the sub-arctic tundra, one of the world’s pristine environments with one of the most delicate ecosystems. We are committed to protecting the biodiversity of this unique landscape.

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For example, we have developed world class engineering technology and techniques to hold back the waters of Lac de Gras (to reach the diamond-bearing pipes at the bottom of the lake) in a way that minimises disturbance. Once we have built the embankment, creating a pool of water within the lake, we pump millions of litres from this pool back into the lake, monitoring water quality and fish stocks.

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All mines have a finite life cycle and Diavik has planned for its closure from the outset. The buildings on site have been designed to be removed without a trace. And when mining ends, the embankments will be reclaimed and lake water will flow back into the open pit. 

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In 2018, we opened a fourth diamond pipe, known as A21, at the Diavik Diamond Mine. The new open pit pipe will provide an important source of incremental supply over the next four years to sustain production levels at the mine. The A21 pipe is located adjacent to Diavik’s existing mining operations at Lac de Gras. First ore was delivered in March following a four-year construction period and an investment of approximately $350 million, shared by Rio Tinto and joint venture partner Dominion Diamond Corporation. This investment to sustain production levels at Diavik reflects the strong outlook we see for the diamond industry.