Mining, Milling & Marketing The mine is situated on top of McDame mountain, about nine hundred metres above the town. It is western Canada’s only asbestos producing mine and since 1952 it has been a major contributor to British Columbia’s growing economy. Located in the valley below is the mill, and between it and the mine there stretches a five kilometre aerial tramline, an indispensable link in the continuous production of Cassiar fibre. The asbestos outcrop at Cassiar was discovered on the western slope of McDame mountain. Subsequent exploratory work proved that the ore zone is large and shaped like a lentil or a big green onion. The geologists describe it as “massive lenticular ore body”. It strikes in a northwesterly direction and dips approximately forty degrees to the east, extending below the main peak of McDame mountain which, before the stripping program began, had an elevation of almost 2,135 metres.