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r <br />iii iiiiiiiiiii <br />C c~~us <br />~ Y~Pava~iey <br />Cyprus Yampa Valley Coal Corporation <br />29587 Routt County Road #27 <br />Oak Creek, Colorado 80467 <br />303-879-3800 <br />December 3, 1993 <br />i~,~-n <br />REGE <br />pEC C G 1S93 <br />Kent Gorham Ciri~'c^, ~' t,, ~'_.~ - <br />Reclamation Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: Request for Minor Revision 93-99. Belt Out Back: Permit C-82-056. Twentvmile <br />Coal COmDanV <br />Dear Mr. Gorham: <br />Enclosed, please find the revised materials which pertain to the above-referenced minor <br />revision request. TCC is requesting this revision to allow the construction of a conveyor <br />belt, drive structure, belt take-up, and control building which will move coal from the <br />secondary crusher building out to the ROM coal pile. The location of the proposed belt, <br />drive structure, and control building is denoted on the enclosed Map 24 (Surface <br />Facilities). As previously discussed, the belt and associated items will be constructed <br />within a previously disturbed area, and is located within the existing drainage control <br />system. As such, there will be no topsoil activities associated with this revision, and it <br />is not anticipated that any significant drainage modifications will be entailed. <br />Construction of the belt will utilize the existing secondary crusher building for the tailpiece <br />assembly and tail support, and will entail the construction of two bents and an elevated <br />drive structure for support of the main 48" belt structure. In addition, it is possible that <br />the belt take-up may require an additional concrete support slab immediately adjacent to <br />the east wall of the secondary crusher, but this is dependent upon final take-up location <br />and is uncertain at this time. TCC has included the costs for this additional slab in the <br />enclosed bond calculation in the event this slab becomes necessary. <br />The support bents will be of typical steel construction, with the furthermost bent being <br />of 4-leg construction, while the inner bent will be of 2-leg construction. These bents will <br />be supported by 48" diameter concrete piers extending approximately 25 feet down to <br />bedrock. These piers will be connected by grade beams (footers) approximately 1'x4'x18' <br />to form the foundations. The drive structure will be a steel frame construction elevated <br />on four 30" piers which will also extend approximately 25' to bedrock. The 12'x16'x10' <br />MCC building will be of typical steel construction, and will be placed on a 12'x16'x6" slab <br />constructed over 1'w x 4'd foundation footers. Soil removed for the installation of the <br />slabs and piers will be used to backfill around the piers, or will be spread out depending <br />on the situation. <br />