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III IIIIIIIIIIIII III <br />999 <br />-'?7? 214 Rd. <br />Silt Co.,81652 <br />R?F-2947 <br />Eastside Coal Mine <br />P.O. 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 backsight 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 6275.055. <br />This survey meets or exceeds Second Order, Class II survey. <br />standards. <br />~t _ ,_ _aD L. ,, <br />Richard L. Hols ~$:S.L13 $s,~ <br /> SS ~ <br /> ii~1350 : <br /> <br />9 <br />s~•.tio * <br />0. <br />ql±,, :ur.~. ,: ~~ <br />c pF ~O,`O~~r . <br /> <br /> <br /> <br />