The Diavik Diamond Mine is a diamond mine in the North Slave Region of the Northwest Territories, Canada, about 300 km (190 mi) northeast of Yellowknife.

The area was surveyed in 1992 and construction began in 2001, with production commencing in January 2003. In 2006, the ice road from Yellowknife to the Diavik mine, and neighbouring mines, froze late and thawed early.[1] The Diavik mine was unable to truck in all the supplies needed for the rest of 2006 before the road closed and arrangements had to be made to bring the remainder of the supplies in by air. Subsequent annual ice road resupply has been completed as planned.

On July 5, 2007, a consortium of seven mining companies, including Rio Tinto, announced they are sponsoring environmental impact studies to construct a deep-water port in Bathurst Inlet.[2][3] Their plans include building a 211 km (131 mi) road connecting the port to their mines. The port would serve vessels of up to 25,000 tonnes.

In March 2010, underground mining began at the mine. The transition from open pit to underground mining was completed in September 2012.[4]

In September 2012, Diavik completed construction of the Northwest Territories' first large scale wind farm. The four turbine, 9.2 megawatt facility provides 11 per cent (2015) of the Diavik mine's annual power needs and operates at 98% availability. Diesel fuel offset is about five million litres (1,300,000 US gal) per year. Diavik operates the world's largest wind diesel hybrid power facility at its remote off-grid mine. The wind farm, operational down to −40 °C (−40 °F), sets a new benchmark in cold climate renewable energy.[5][6]

In 2015, $US350 million was announced to fund development of a fourth kimberlite pipe ore body, known as A21. Construction of the A21 rockfill dike (like the other three ore bodies, A21 kimberlite pipe is under shallow waters of Lac de Gras) is expected to be complete in 2018 with first diamonds expected in the fall of that year. To build the dike, Diavik will use the same technologies as were used to build the A154 and A418 dikes.[citation needed]

In December 2015, Rio Tinto announced discovery of the 187.7 carat Diavik Foxfire diamond, one of the largest rough gem quality diamonds ever produced in Canada. The Diavik Foxfire was bestowed an indigenous name, Noi?eh Kwe, which, in the Tlicho First Nation language means caribou crossing stone.[7]

In October 2018, a yellow diamond of 552 carat was found at the mine. This is the largest diamond ever found in North America.[8]

^ "Diavik Fact Book: The Diavik Diamond Mine" (PDF). Diavik Diamond Mine Incorporated. Retrieved 2007-09-04. ^ Bob Weber (July 4, 2007). "Arctic port plan gathers steam". Toronto Star. Retrieved 2007-07-11. ^ Jonathan Ratner (July 5, 2007). "New Arctic port plan for Northern miners". National Post. Archived from the original on 2007-11-06. Retrieved 2007-07-11. ^ Guy Quenneville (March 29, 2010). "Diavik goes underground". Northern News Services. Archived from the original on March 25, 2012. Retrieved 2010-08-29. ^ Diavik Diamond Mine powers up with wind ^ Innovative and efficient wind farm delivers ^ "Rio Tinto unveils one of largest diamonds ever found in Canada". Retrieved 27 April 2017. ^ "This 552-Carat Yellow Diamond Is The Largest Ever Found In North America". Retrieved 16 December 2018.
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