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^~~ ~ ~ <br />TRflPFER ~(i~IRG tNC. <br />June 11, 1990 <br />CERTIFIED P468 756 334 <br /> <br />Mr. David Berry <br />Colorado Mined Land Reclamation Division JUN ~ 2 1~~1 <br />215 Centennial Building MINED ~~~ <br />1313 Sherman Street -~cr~ zAAp~IQN nIV~~""' <br />Denver, CO 80203 `" "" <br />Dear Dave: <br />Subject: Minor Revision MR-100. Proposed Topsoil Removal Exclusions Areas in <br />Ashmore and Derringer Pits in 1990 <br />During field inspections of Trapper Mine's 1990 topsoil salvage areas, several <br />locations were identified as meeting Trapper's permit criteria for excluding <br />these areas from topsoil salvage. These criteria are outlined in permit <br />section 4.9.1 (page 4-250). - - <br />The exclusion areas are comprised of rock outcrops that will present a safety <br />hazard to people and/or potentially damage-heavy equipment. Trapper will make <br />every effort practical to salvage topsoil in these areas. The rock outcrops <br />(exclusion areas) are located within Trapper's 1990 stripping limits in <br />Ashmore and Derringer pits and comprise of 7.8 acres in size (see attached map <br />M56). <br />The estimated topsoil stripping quantity for the proposed 180.5 acres of <br />disturbance in Ashmore and Derringer pits, is estimated at 483,483 bcy (Taule <br />1). The topsoil yaraage needed to replace 180.5 acres of rangeland to a 12- <br />inch depth is 291,207 bcy. Based on these stripping and replacement values, <br />we show a surplus of 192,276 bcy's. Thus, there is sufficient topsoil <br />available to reclaim the entire Ashmore and Derringer pit areas if the <br />proposed 7.8 acre topsoil stripping exclusion area is approved. <br />David, if you have any questions, please call Bill Harding or me. <br />WSH/WA/kaw/025 <br />Enclosure <br />pc J. M. Mattern <br />R. W. Fish <br />W. S. Harding <br />T. Carwile <br />R. L. Fanyo, WDB~T <br />File <br />P.O. Box 187 <br />Sincerely, <br />~'S~ S <br />William A ew <br />Sr. Environmental Engineer <br />Craig, Colorado 81626 <br />(3031 824-4401 <br />