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EASTSiDE COAL COMPANY. IN G. <br />Subsidence Report <br />September 1993 <br />Extraction Limits <br />No mining has occurred at the Eastside Mine since the last subsidence <br />survey. The Mine Map dated September, 1993 shows the current extent <br />of mining. A conservative angle of draw of 25' includes Monument 1 and <br />2 in the area of possible influence from subsidence. <br />Observed Subsidence <br />Monuments 1 and 2 as well as the Alternate Monument Points 1 and 2 <br />were surveyed on September 29, 1993. <br />1'he results are shown in the enclosed tables. <br />honument 1 and Monument 1:Alternate both show a decrease in elevation <br />of 0.380 and 0.096, respectively, from the original survey, Monument 2 <br />and Monument 2:Alternate both show a decrease of 0.320 and 0.085, <br />respectively, from the original survey. The differences from the original <br />surveys ma}~ be due to heat wave activity on the survey dates. <br />All four Monuments, 1, 2, 1: Alternate, and 2: Alternate, will be surveyed <br />in the future to see if seasonal trends continue. The survey continues <br />to show minimal seasonal movement due to frost heaving. <br />No structures oc renewable resources have been affected by subsidence <br />of the Eastside Mine. <br />