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State Reg. <br />• Bence due to auger operations at the Seneca Mine were all investigated <br />before arriving at a safe angering distance from the structures. Figure <br />MR17-I illustrates the relationship between the proposed holes and the <br />poles. The following calculations determine the distance. <br />CALCULATIONS <br />Angle of subsidence = 20° <br />Safe distance from pole = D <br />Depth from pole to hole = x <br />Existing powerline easement granted to Western Area Power <br />Administration = 40 feet around the poles <br />Easternmost Pole: (Wadge Coal) <br />tan 20° = D/x <br />D = x tan 20° <br />• D = 60' tan 20° <br />D=21.84 feet <br />D + easement = 40' + 21.84' <br />= 61.84' <br />In order to maintain a safe distance, Peabody Coal Company will not auger <br />closer than 75 feet radially of this structure. <br />Center P°le: (Wadge Cool} <br />D = 71' tan 20° <br />D = 25.84 feet <br />D + easement = 40' + 25.84' <br />= 65.84' <br />In order to be safe, Peabody Coal Company will not auger closer than 75 <br />feet radially of this structure. <br />• <br />12-3-3 <br />