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• iii iiiiiiiiiiiu iii • <br />999 <br />11/07/88 <br />To: National King Coal Inc. <br />Subject: Quarterly Subsidence Monitoring, Monitoring Stations <br />The fourth quarterly survey check for subsidence at the National <br />King Coal Myne, La Plata County, Colorado was made on November <br />04,1488. <br />Four of the permanent control points were located and checked.. <br />The relationship between the points was checked by setting up <br />over Point 2, backsighting Point 1 and turning both direct and <br />reverse angles to Points 3 and 4. All distances to each point <br />were also checked. Levels were run to check the elevation on <br />all existing points. <br />The conclusion from the field data compiled on November 04, 1988 <br />shows that there has been no evidence of appreciable difference <br />in any of the subsidence points. <br />--~ <br />CZetcz~., Dx~~'k~ <br />Cecilia Berry <br />Cl~ f Schmid P.L.S. ?13?3 <br />'~'' .o <br />~'` 1133 ? ~ <br />. -yam . G +r _.' (,. <br />.f. ry4 ~~ <br />'4~`~'• ,.C0.. <br />~~~L._fi ~.~L,,; <br />V~ <br />