Laserfiche WebLink
~ <br />M • III III III III IIIIIII • <br />I HIND <br />' <br />E%PLORATION FRED M. JOHNSON. C P.G. <br />ENGINEERING <br /> GEOlOG15T <br /> P.O. BO% 2162 <br /> DURANGO COLORADO B73D2 <br />April 20, 1989 <br />TO: National King Coal <br />OFFICE ]03 ]4]0110 <br />RESIDENCC 26]]560 <br />SUBJECT: Quarterly Subsidence Monitoring, Second Quarter 1989 <br />1) The second quarterly visual inspection for subsidence, King <br />Coal Mine, La Plata County, Colorado was made on April 19, 1989. <br />2) No inspection was possible during the first quarter because <br />of snow cover. <br />3) 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 />ed M. John C.P.G. <br />