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Eastside Coal Company, Inc. <br />Subsidence Report <br />June 1991 <br />Extraction Limi <br />No mining has occurred at the Eastside Mine during the last nine months. <br />The Mine Map dated October 5, 1990 shows the current extent of mining. <br />A conservative angle of draw of 25o includes Subsidence Point 2 in the <br />area of possible influence from subsidence. <br />Observed Subsidence <br />Alternate Points 1 and 2 were set June 20, 1991 in accordance with Minor <br />Revision 08. Points 1 and 2 as well as Alternate Points 1 and 2 were <br />surveyed on June 25, 1991. Re-installment of the monuments below the <br />frost line should correct the frost heave variations. <br />Results from the original Monuments 1 and 2 as well as the Alternate <br />Monuments 1 and 2 are reported. The results from Monument 1 and 2 <br />indicate the points did not subside during the last nine months. Since <br />the points were originally set, the total vertical movement of <br />Monument 1 was 0.287 feet, and the vertical movement of Monument 2 was <br />0.363 feet. <br />No structures or renewable resources have been affected by subsidence <br />of the Eastside Mine. <br />