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1- <br />~, rl~,~^d F~(?1SaI1 <br />4?7? 714 Rd. <br />Silt Co.,81652 <br />A76-2947 <br />Eastside Coal Mine <br />P.0. Box 161 <br />Silt Co. 81652 <br />Re: Subsidence Monitoring <br />I certify that on February 13, 1990 I conducted a field <br />survey to monitor the position of Subsidence Monument No. 1. <br />Listed below are the results of that survey: •- <br />North Coordinate 8574.896, East Coordinate 9269.108 <br />Elevation 6411.33. <br />The survey is based on coordinates of N 8725.513, E 8958.266 <br />at the backlight point (Rebar & Cap) named Mine. This point, <br />is also the benchmark for vertical control having an <br />elevation of 6347.00. Coordinates for the setup point (iron <br />stake near tire) are N 8683.647, E 8275.055. <br />This survey meets or exceeds Second Order, Class II survey. <br />standards. <br /> <br />i <br />{ <br />i <br /> <br /> <br />