From 2013 to the end of 2015, the Detour Lake mine produced 1.2 million oz of gold from 49 million mt of ore processed at an average grade of 0.85 g/mt gold.

Detour Gold’s new mine plan calls for near-term development of the relatively shallow West Detour deposit immediately west of the currently mined Detour Lake open pit, along with processing of fines from low-grade stockpiles, beginning at a rate of 1 million mt/y in 2019. Mill throughput will increase from 56,000 mt/d to 63,000 mt/d in 2019. Mining at West Detour will allow deferral of some stripping required for mining the Detour Lake open pit.

Based on current mineral reserves, the Detour Lake operation has a remaining mine life of 23 years, with West Detour having an operating life of about 10 years from 2018 to 2028. Life-of-mine gold production will average an estimated 655,000 oz/y from 2016 through 2038, including 617,000 oz/y from 2016 through 2018.

Life-of-mine total site costs are estimated at $690/oz of gold produced. Lifeof- mine capital costs are estimated at C$1.1 billion.

Proven and probable reserves on the Detour property, including low-grade fines, now total 16.4 million oz of contained gold in 514 million mt at a combined grade of 0.99 g/mt gold.

Current mining at Detour is based on conventional open-pit mining methods, and mining at West Detour is planned to use the same methods.