Drummond Dolomite
Long after the British had gone, Americans employed Drummond Island rock to build the early locks at the Sault – and much of that rock was dolomite. In the late 'twenties, T. L. Durocher, of DeTour opened the present Drummond Island Quarry to obtain rock for the construction and rip-rapping of docks and breakwaters on the Great Lakes. Mr.