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• 1995 Subsidence Report <br />Page 5 <br />Station 94: Station 94 was newly established in 1993 and is located at <br />the Grosse-Rhode cabin identified as structure 32 on permit <br />No. C-81-038; Map No. 9-7. Advance mining of Panel Yin the <br />vicinity occurred during Demos 1993 and retreat mining <br />occurred in early 1994. This station overlies approximately <br />2000 feet of overburden. The monitoring point established at <br />this site was surveyed Decanbes 8, 1993 at elevation 8755.95. <br />The Octd~s 1994 survey indicates an elevation loss of 0.17 <br />feet cc~ared to the December 8, 1993 survey. The June 1995 <br />survey perforned by [TPE Engineering showed and increase in <br />elevation of 1.54 feet. See the report frnniTPE Engineering <br />behind tab 7 for an explanation of this data. <br />Station 95: Station 95 is located at the North quar-ter~orner of Section <br />15. The elevation of Station 95 was defined by satellite <br />survey in July 1992 at 8415.4 feet. Panel Y development <br />occurred east of Station 95 during July 1993. Station 95 was <br />re-surveyed in January 1994 and showed a 0.76 foot elevation <br />loss. It is not apparent whether this elevation change is <br />associated with subsidence or the difference in survey <br />techniques. Cover in the vicinity of Station 95 is <br />approximately 1550 feet and subsidence of this degree would <br />• not be anticipated in this area particularly prior to retreat <br />mining operations. Station 95 was pillared under in <br />September or October 1994. The October 1994 survey indicates <br />a minor (0.08 foot) loss in elevation ca~g~aned to the January <br />1994 survey. The June 1995 survey performed by APE <br />Engineering checked within 0.04 feet of the satellite survey. <br />Based on the [Ji'E survey, station 95 appears to be stable. <br />Station 96: Station 96 was newly established in 1993 and is located at <br />the Grosse-Rhode garage identified as structure 33 on permit <br />No. C-81-038; Map No. 9-7. Advance mining of Panel Yin the <br />vicinity occurred during Deer 1993 and retreat Honing <br />occurred in early 1994. This station overlies approximately <br />2000 feet of overburden. The monitoring point established at <br />this site was surveyed Deart~bes 8, 1993 at elevation 8733.03. <br />The October 1994 survey indicates an elevation gain of 0.49 <br />feet comq~ared to the De~nbP.r 8, 1993 survey. The June 1995 <br />survey performed by VPE Engineering shared and increase in <br />elevation of 0.54 feet. See the report from [7PE Engineering <br />behind tab 7 for an explanation of this data. <br />Station 97: Station 97 was newly established in 1993 and is located at <br />the Grosse-Rhode A-frame cabin identified as structure 35 on <br />permit No. C-81-036; Map No. 9-7. Pdvance mining of Panel Y <br />east of this locating occurred during December 1993 and <br />• retreat mi~inq occurred in early 1994. This station overlies <br />approximtetely 2100 feet of overburden. The mronitoring point <br />established at this site was surveyed December 8, 1993 at <br />