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• • iii iiiiiiiiniiiiii <br />~~ YVCC <br />Yampa Valley Coal Corporation 129588 Routt County Road #27, Oak Creek, CO 80a67 • (303) 879-3800 <br />January 19, 1988 <br /> <br />David Berry JA~J 22 19x8 <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 423 MINED LAN D <br />Denver, CO 80203-2273 RECLAMAl'ION DIVISION <br />Dear Mr. Berry: <br />Re: Adequacy Response, CYCC Technical Revision 87-12; Propose <br />n_.~____i n__~- n_-..a r o, nom, <br />The following information is provided in response to your adequacy <br />review dated December 14, 1987. The information is formatted using the same <br />headings as in your review. <br />Area 41 Haul Road Fill <br />a, b, & c) Methodology and justification for the designs used for <br />stabilization of the Area 41 drainage are provided in Appendix 1 "Channel <br />Design: of CYCC's Permit Revision 86-2 "Postmining Topography Modification <br />and Channel Repair". The above referenced Permit Revision also provides <br />information for riprap size distribution, and filter bed design. <br />Designs for the 10.3% slope channel section have been completed and are <br />included on Table 87-12-1. <br />d) The culvert in the Area 41 fill will not be removed. As agreed upon in <br />the meeting of October 1, 1987, both ends will be crushed and the culvert <br />buried. <br />e) The crossing of this channel will be accomplished by installing a rocked <br />grade crossing. <br />f) Most, if not all, of the grading can be accomplished without disturbing <br />any existing topsoil. CYCC proposes to leave undisturbed areas in tact as <br />much as possible. If during regrading it is necessary to disturb any <br />previously undisturbed areas all topsoil will be removed and used to reclaim <br />side slopes. <br />g) Reclamation of valley - side slopes will be accomplished following the <br />methodology approved in the Reclamation Plan under section 780.18 (Topsoil <br />Removal, Storage and Redistribution Plan, Revegetation Plan, and Soil <br />Stabilization Plan). On slopes too steep for tractors to safely work on the <br />contour soil stabilization will consist of tracking up and down the slope <br />with a dozer and broadcast seeding as described on permit renewal page <br />780-129-2. <br />