In 2015, the mine’s four turbine 9.2 megawatt wind farm exceeded annual targets. For the year, diesel fuel offset was 5.2 million litres and CO2-e offset was 14,404 tonnes. Over the year, the facility generated 20.8 gigawatt hours with an operational availability rating of 98 per cent. Renewable energy provided 11 per cent of the mine’s power needs.
Peak power levels, achieved for brief periods, have surpassed 50 per cent – enough wind energy to power Diavik’s underground mine.
The $31 million project is Rio Tinto's first wind generation facility and the first large-scale wind farm in Canada's Northwest Territories. With the wind farm, brought on-line in September 2012, Diavik became the operator of the world's largest wind-diesel hybrid power facility. The off-grid Diavik Diamond Mine is located on an island in a subarctic lake called Lac de Gras, in Canada's remote Northwest Territories.