Résultats

      Photo of blasting (O2) in 1972 at the Amethyst Mine Panorama.

      Photo showing the site of the main office of the Thunder Bay Amethyst Mine, 1970.

      Shown here is a 1977 photo of an open mining pit at the Thunder Bay Amethyst Mine.

      Shown in this photo is open pit benching. Benching of a steep work face consists of narrow horizontal steps across the slope. The rock is exposed and then inspected. Open pit benching is used where slopes are sufficiently steep, water supply is available, and there is room for the dump …

      Saul Laskin in his office at City Hall taken during an interview in 1972.