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._ t <br /> • <br />MINING <br />E%PLORATION <br />ENGINEERING <br />FRED M. JOHNSON. C.P.G. <br />GEOLOGIST <br />P.O BO% 2162 <br />D URANG O. COLORADO 81]02 <br />September 19, '_989 <br />TO: National King Coal, Inc. <br />• <br />OrrICE !O! 2~~'0118 <br />RESIDENCE ]<T'336G <br />SUBJECT: Quarterly Subsidence Monitoring, Third Quarter, 1989 <br />1) The third visual inspection for subsidence, King Coal Mine, <br />La Plata County, Colorado was made on September 18, 1989. <br />2) Particular attention was given to the area of subsidence <br />effects reported on 9/19/83, NW SE NW, 32, 35N, 11W. <br />3) No new areas of subsidence are apparent. <br />The surface above both old and current workings, was in- <br />spected. The shear fracture located in the NW; SE', NW;, Section <br />32, T35N, R11W has not increased in either length or width and <br />has been partially filled with sediment by runoff. The shear is <br />partially masked by new plant growth. A small, subparallel shear <br />fracture was noted approximately 7.0' to the northeast which has <br />a width of 0.1' to 0.2' and a length of less than 15.0'. This <br />is located centrally along the original fracture and appears to <br />be a result of tension caused by the original fracture. <br />The remainder of the surface was inspected for evidence cf <br />slump, subsidence, shearing, cracks in bedrock, vegetation damage <br />and water infiltration. No evidence of new subsidence is apparent. <br />The purpose of this inspection was to meet requirements es- <br />tablished by the Colorado Mined Land Reclamation Division for <br />(1) <br />