. Ontario Sessional Papers, 1914, General View of New Plant at Helen Mine. Steep Hill Falls Power House, Michipicoten 1914 Mines of Ontario 127 On the seventh level the ore is mined by the caving system. Three sub-levels arebeing worked between the sixth and seventh levels. These sub-levels are 15 feet apart,and are carried in a series of steps from the sixth to the seventh level. All theore is trammed into raises by 1-ton cars, and goes to the eighth level. It is taken fromthe raises on the eighth level to the shaft in 2-ton cars. A large deposit of low-grade pyrite, which lies under
. Ontario Sessional Papers, 1914, General View of New Plant at Helen Mine. Steep Hill Falls Power House, Michipicoten 1914 Mines of Ontario 127 On the seventh level the ore is mined by the caving system. Three sub-levels arebeing worked between the sixth and seventh levels. These sub-levels are 15 feet apart,and are carried in a series of steps from the sixth to the seventh level. All theore is trammed into raises by 1-ton cars, and goes to the eighth level. It is taken fromthe raises on the eighth level to the shaft in 2-ton cars. A large deposit of low-grade pyrite, which lies under Boyer lake, will be opened upin the near future. This pyrite occurs in the form of sand. The impurities are verysmall particles of iron ore intimately disseminated throughout. A concentrating plantwill be installed to handle this pyrite. A. A. MacKay, superintendent, was succeeded by G. R. MacLaren in September. Anaverage force of 80 men was employed. International Trap Rock Company The trap rock quarry at Bruce Mines was opened up and a large plant installed in1913. The rock i
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