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• <br />reduces the associated hazards such as explosions, fires, and <br />respiratory health problems. <br />• Because very little equipment is required to produce large volumes <br />of coal, the exposure of personnel to equipment-related accidents <br />is low compared with the more commonly used systems. <br />• Historically, the safety record for hydraulic mines has been good. <br />In Canada, accidents related to hydraulic mining have been very <br />low and consequently many high level coal mine safety awards <br />have been won by these mines since the early 1970's when the <br />first Canadian hydraulic mine opened. <br />• <br />4.3.2.1 Permit, Disturbed, and Affected Acreages <br />Table 4.3-1 Permit, Disturbed, and Affected Acreages <br />Permit Area Acreage <br />Main Permit Area (5-year permit) 2484.3 <br />Disturbed Area <br />Surface Facilities Site 45.2 <br />Affected Area <br />Surface Facilities Site 45.2 <br />Rock Tunnels 0.5 <br />Total Affected Area 45.7 <br /> <br />The surfaces facilities area is based on measuring the area that was actually disturbed. <br />The rock tunnels were driven approximately 750 feet each south towards the coal <br />reserve. This calculates to about 0.5 acres of additional affected area. <br />NCIG-Coal Ridge No. 1 <br />4-20 <br />5/00 <br />