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Richard Holsan <br />4773 214 Rd. <br />Silt Co.,61652 <br />876-2947 <br />Eastside Coal Mine <br />P.O. Box 161 <br />Silt Co. 81652 <br />Re: Subsidence Monitoring <br />I certify that on December 30 1988 I conducted a field survey'" - <br />to monitor the position of Subsidence Monument No. 1. <br />Listed below are the results of that survey. <br />North coordinate 6574.939, East coordinate 9269.078 <br />Elevation 6411.400 <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 6347.000. 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 />These standards are as follows: ~ <br />Vertical- 0.035 miles or 0.013 ft. in this survey. <br />Horizontal- 1:10000 or 0.168 ft. in this survey. <br />Richard L Holsan PLS <br />.. ~, <br />¢ ` LS ~~ <br />~?~13501o~.~{i <br />~9 <br />,n J'l, ~~; yo SU R`fi`~`~ O <br />qlF of coi~`~~~ <br />