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MININO • • <br />!%PLORATION FRED M. JOHNSON. C.P.G. <br />ENOIN[lRINO GEOLOGIST <br />P.O. BO% 2182 <br />DURANG O. COLORADO BI302 <br />April 30, 1986 <br />T0: National King Coal, Tnc. <br />OFFICE 809 ]47.0118 <br />RESIDENCE ]47-9880 <br />i •'' .. <br />JUnI 13 ;986. <br />SUBJECT: Quarterly Subsidence Monitoring, Second Quarter 1986 <br />1) The second quarterly visual inspection for subsidence, King <br />Coal Mine, La Plata County, Colorado was made on April 29, 1986. <br />2) No inspection was possible during the first quarter because <br />of heavy snow cover. <br />3) Survey stations will be monitored by Clifford Schmid, L.S. <br />during this quarter. Three additional survey stations were laid <br />out during this inspection and will be tied in by Mr. Schmid. <br />4) No new evidence of subsidence is apparent. <br />The surface area above both old and current workings was <br />inspected. Particular attention was given to the most recent <br />areas of retreat. The surface was inspected for evidence of <br />slump, subsidence, shearing, cracks in bedrock, vegetation <br />damage and water infiltration. No evidence of new subsidence <br />is apparent. <br />The purpose of this inspection was to meet requirements <br />established by the Colorado Mined Land Reclamation Division <br />for quarterly monitoring of the surface for subsidence. <br />~ , <br />%7/ /~/~i~/L L.~.- <br />--Fred M. Jo4aa'"son, C.P.G. <br />.% <br />