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In the 80 plus years we have been in business we have sunk over a hundred miles of shafts conventionally. Finished diameters have varied from a 36 feet surge shaft to an 8 foot diameter bleeder shaft. Depths have varied from less than 100 feet to close to a half a mile. The shafts have been lined to the client's specifications with steel, concrete, shotcrete, or fibercrete. Most have been used for varying purposes in coal and non-ferrous metals for man and material access in and out of the mine and fan ventilation purposes. We have also constructed many miles of slopes of various sizes both from the surface to underground and underground from location to location. Lengths have varied from a couple of hundred feet to well over a mile. Configurations have been plain unlined for ventilation with concrete floors for rubber tired equipment and with rails for track mounted equipment. Sizes have varied from widths of 24 feet to as little as 6 feet and heights up to 24 feet. The slopes and access tunnels have been constructed for various companies to access underground workings with gradients varying from a fraction of 1% up to 100%. Some of our projects we have recently completed:
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