1979
Underground loader and operator filling a rock tunnel.
The company
Hudson Bay Mining has operated its own copper-zinc mines and metallurgical plants in northern Manitoba and Saskatchewan, Canada, since 1930.
Hudson Bay Mining Annual Report 1979, p. 3
That year
In northern Manitoba’s Flin Flon-Snow Lake district, Centennial Mine held rated capacity until late November 1979, when a bulkhead failure shut the mine until year-end.
Hudson Bay Mining Annual Report 1979, p. 22