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<br />EASTSIDE COAL COMPANY, INC. <br />Subsidence Report <br />December 1991 <br />Extraction Limits <br />No mining has occurred at the Eastside Mine since the last subsidence survey. <br />The Mine Map dated October 5, 1990 shows the current extent of mining. A <br />conservative angle of draw of 25' includes Monument 2 in the area of possible <br />influence from subsidence. <br />Observed Subsidence <br />Monuments 1 and 2 as well as the Alternate Monument Points 1 and 2 were <br />surveyed on December 20, 1991. The results are shown in the enclosed tables. <br />The last 4 surveys of Monument 1 indicate no appreciable movement. The <br />results are between 0.260 feet and 0.287 feet below the original survey. This <br />is a maximum variation of 0.027 feet between the last four surveys. Monument <br />1: Alternate shows an increase in elevation of 0.014 from the last survey. <br />Monument 1 has an increase of 0.027 feet which is almost twice that of <br />Monument .1: Alternate. <br />The last 4 surveys of Monument 2 indicate no appreciable movement. The <br />results are between 0.270 feet and 0.363 feet below the original survey. This <br />is a maximum variation of 0.093 feet between the last four surveys. Monument <br />2: Alternate shows an increase in elevation of 0.075 from the last survey. <br />Monument 2 has an increase of 0.033 feet which is less than one half that of <br />Monument 2: Alternate. <br />All four Monuments, 1, 2, 1: Alternate, and 2: Alternate, will be surveyed in <br />the future to see if this trend continues. <br />No structures or renewable resources have been affected by subsidence of the <br />Eastside Mine. <br />