_GENERAL DOCUMENTS - C1981017 (239)

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IN►EROFFICE CORRESPONDENCE To: John Turner From: Scott Jones Date. December 28, 1989 Subject, inspection of Coal Basin Refuse Pile and Rock Tunnel Waste Pile Fourth Quarter, 1989 On December 22, 1989 an inspection was made of the Mid-Continent Resources Sutey Coal Refuse Pile and the Rock Tunnel Waste Pile The inspection was made by myself, a Registered Professional Engineer in the State of Colorado, I nave had over eight years experience in the design, construction and operation of refuse piles. The purpose of this inspection was to ensure that the refuse piles were being constructed according to the approved designs and the requirements of Rules 4.9 and 4. 10 of the Colorado Mined Land Reclamation Board and 30CFR 77.215 of the Mine Safety and Health Administration. The inspection included observations of structural stability, compaction procedures and hydrologic control. Sutey Coal Refuse Pile At the time of inspection snowcover made observations somewhat difficult.The Sutey Refuse Pile was receiving refuse from-the washer plant. The refuse was discharged onto the pile by a conveyor belt. A D-8 Dozer was pushing the refuse material from the discharge point to the northern end of the pile. The horizontal lifts being pushed out were less than two feet thick. After spreading the material the dozer was making several passes over the refuse in order to facilitate compaction. From the conveyor belt discharge point, accumulated refuse was being pushed down the slope to the northern end of the pile where it was being placed in two foot horizontal lifts. Snow was being pushed away from the active area prior to any placement of refuse material A walkarounc of the entire area indicated that all ditches, ponds and culverts were in good working order, There was no evidence of ponding or structural instability anywhere on the pile.