Canadian diamonds The Ekati Diamond Mine is Canada's first underground diamond operation, and is owned by Dominion Diamond Mines. To date, Ekati has produced nearly 40 million carats of uncut diamond stones out of 6 open pit mines. The Renard diamond mine is Quebec's first diamond mine. The mine is expected to produce an average of 1.6 million carats per year over an initial 14-year mine life. The Snap Lake Diamond Mine is located northeast of Yellowknife as well, not far from Diavik. Snap lake is owned by De Beers and was their first mine outside of Africa. Snap Lake is also
Underground mine ventilation the permafrost heating may not take place to prevent melting the permafrost. "Cold mines" such as Raglan Mine and Nanisivik Mine are designed to operate below 0°C. The wet bulb temperature in any working place does not exceed 33.5°C and where the wet bulb temperature exceeds 30.5°C arrangements are made to ventilate the same with a current of air moving at a speed of not less than one metre per second; Underground mine ventilation Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove dust and noxious gases