Detour Lake Mine

The Detour Lake mine property contains the mineral rights to a large area, approximately 235 km2 (91 sq mi), in northeastern Ontario, near the Quebec border, approximately 185 km (115 mi) northeast of Cochrane, Ontario, or 260 km (160 mi) northeast of Timmins, Ontario. In 1979, rights-holder Amoco Canada Petroleum agreed with Dome Mines and Campbell Red Lake Mines Ltd. (which would both merge in 1987 with Placer Development Ltd. to form Placer Dome) to explore and develop the mineral resources. In 2019, Detour Gold – the former operating company of the mine – was acquired by Kirkland Lake Gold. After exploration and feasibility studies, by 1982, they estimated that a mine could be constructed at a cost of $143 million, consisting of an open pit for the first four years before transitioning to an underground mine to access a higher concentrations area at lower costs. The project included the construction of an 180 km (110 mi) all-weather road from Cochrane and a 45 megawatt transmission line, though they were mostly funded by the province. By the time of the mine's opening in November 1983, they had an estimated reserve of 3.5 million ounces of gold with an expected mine lifespan of 22 years, and an expected additional cost of $110-million for the underground and mill expansion. However, gold prices had peaked in 1980 and, combined with actual concentrations of gold being lowe

Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).