The Giant Mine was a gold mine located on the Ingraham Trail, north of Yellowknife, Northwest Territories. Giant Mine was within the Kam Group, a part of the Yellowknife greenstone belt. Gold was discovered on the property and mineral claims staked in 1935 by Johnny Baker, but the true extent of the gold deposits was not known until 1944, when a massive gold-bearing shear zone was uncovered beneath the drift-filled Baker Creek Valley. History The discovery led to a massive post-war staking boom in Yellowknife. Giant Mine entered production in 1948 and ceased operations in 2004. It produced over of gold. Owners of the mine have included Falconbridge (1948–1986 through subsidiary Giant Yellowknife Mines Limited), Pamour of Australia (1986–1990 through subsidiary Giant Yellowknife Mines Limited), and Royal Oak Mines (1990–1999). When Royal Oak went bankrupt in 1999 the Department of Indian Affairs and Northern Development (DIAND) took over responsibility for cleaning up the Giant mine site. Miramar Mining Corporation subsequently entered into an arrangement with the government whereby Miramar held the mine operation in care and maintenance, continued underground dewatering operations, and removed the remaining ore from underground for treatment at the nearby Con Mine process facility (1999–2004) . According to an article published in The Star in 2006, there were 15 sealed underground storage chambers 250 feet below ground containing a total of of deadly arsenic trioxide dust, containing up to 60% organic and inorganic arsenic. The dust was a byproduct of extracting gold from the mineral and was collected and stored in sealed underground chambers from 1951 to 1999. Prior to legislated collection and underground storage in 1951 arsenic was released directly into the atmosphere during the roasting process. Arsenic trioxide readily dissolves in water; in 2006 underground flooding around Giant Mine's Mill Pond's underground chamber which contained of arsenic trioxide dust threatened to migrate out of the chamber if it was flooded and dump large amounts of arsenic into Yellowknife Bay. Bombing On September 18, 1992, at the height of a labour dispute during the tenure of Royal Oak Mines ownership, an explosion in a drift of the mine, underground, killed nine strikebreakers. Mine employee Roger Warren was later convicted of placing the bomb. The strike/lockout ended in 1993, pursuant to an order by the (then) Canada Labour Relations Board. A civil suit also resulted on behalf of the families of the replacement workers killed in the