Originally owned by Noranda, shaft sinking and development were started by Canadian Mine Enterprises and when that company went bankrupt during 1983 shaft sinking, lateral and raise development, as well as the initial production mining, employing long hole mining methods, were executed by MacIsaac Mining and Tunnelling.
12.
Because the shaft is flooded, the lining can not be constructed at the excavation level of the shaft so this method only suits methods where the lining is installed before shaft sinking ( such as the use of sheet piles ) or where the lining is sunk down with the shaft such as the caisson method.
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