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', blue ribbon coal company July 28, 1983 • Robert Liddle Reclamation Specialist Colo>lado Mined Land Reclamation 1313 Sherman Street, Room 423 Denver Colorado 80203-2273 Re - Blue Ribbon Coal Co. File d C-047-81 Dear Robert • III Illllllllllll III blue ribbon coal company p. n. box 58 delta, Colorado 81416 1303) 874-7561 ~e!n~rn 1. n.n!n fiF.CI.~MATION I.; CI r;:'t!! q' F':'"'~ ~li P?SCIIfCCS In response to problem ik047-83-15, treatment of the Mine bench, Blue Ribbon Coal Co. is taking the stand that the bench is now stable enough eo ea not to present a major danger to personnel, property or the environment. To achieve the stabilitq needed for a large scale use as a mine bench more work than !e leasable would be needed. We therefore propose to leave the unstable portion of the bench as is except to restrict the use of it more than in the past. We have taken care of three areas that we feel may have contributed to the problem. The sewer line formerly was routed from the belt portal west [o within 20 feet of the edge then follwed the edge of the bencfi to the comb- ination water-sewer-drain berm ofE of the hill. We feel that this line was broken in initial movement oE'the bench and then contributed water to saturate the elide area. This sewer line has been rerouted~a stable portion of the bench as defined by Rocky Mountain Geotec. In digging around the bench en old leach field was located between the fan portal and the belt portal. This old leach field ie now drained by a French drain which drains into the dram line down the utility berm. Upon draining the leach field the standing water under the tan drained. The third improvement in the bench drainage was to continue the solid mine discharge line scrota the bench and part way down the utility berm. The screen has been repositioned on the bench to the east of the previous location. According to the Yocky Mountain Geotec a drilling the screen is on a portion of the cut bench. The dropped area hat been partially re- graded to allow minor useage. iQf there are any further questions you may be able to catch me at 856-6402 or 929-5911. We are in the process of answering the recent questions.on the Pindings document stipulations. Our response should be !n by the end of August. Yo`~ruly, /~/J ~6. Larry Resclike, P.E. Mine Engineer cc- B. Tate /~. • ~• ~~ ~ .