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Page 2 Lower Refuse Area Subsoil Pile - Near MB-6 No subsoil was placed in or removed from this pile during the 4th quarter. The pile was seeded during the 4th quarter. No mulch was placed due to weather conditions. No slope stability problems, erosional problems, or other problems were observed. Lower Refuse Pile Refuse was placed in the Phase II area of the pile during the 4th Quarter. The material was placed in lifts of 2 feet or less and compacted to 908 maximum dry density. Permanent outslopes are 2.5 H to 1 V in the Phase II area. These outslopes are in compliance with the plan. No erosional problems, slope stability problems, or other problems were observed. Refuse generated from the mine is much reduced due to decreased production resulting from loss of a major contract. The refuse pile will grow at a much slower rate than estimated in the plan until coal sales can be increased. Portions of the north slope of the pile which were subsoiled and had not been previously seeded were seeded in the 4th quarter. No mulch was used due to weather conditions. This amounts to approximately one fifth of the existing slope area. A total of two surveys of the monitoring monuments have been completed. Quarterly Pond Inspection Reports Attached Registered Professional Engineer. Certification The quarterly inspections for the 4th quarter 1986 were done under the direction of Richard D. Robison, Colorado If you should have any questions quarter reports, please call me. Sin erely, .C.~.~v~l,~ ~`' Dennis Conn Director of Permitting and Environmental Compliance Attachment regarding the 4th `~~``~G~PP 0 SrFOB/ Q.: °Q.E RFO,G -' ) II lU~ ..Y 2~~ ~. ~~ i ~ ~ .° P~ w cc W. S. Wagener ~,r R. D. Robison / ~~~ ~ ~ ~;