2001-12-11_PERMIT FILE - C1981010A (8)

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TRAPPER ~ININC INC. • ., lJ CERTIFIED P1762794B5 June 27, 1986 Mr. Mike Long Colorado Mined Land Reclamation Division 423 Centennial Building 1313 Sherman Street Denver, CO 80203 Dear Mike: SUBJECT: Minor Revision MR-39, File No. C-010-81, Request to Leave Unsalvage- able Topsoil in Ashmore Pit. During your inspection of Trapper Mine on 6/25/86, we discussed no[ stripping topsoil from portions of the Ashmore Pit area. Per your request, we are sub- mitting a minor revision requesting permission to leave this topsoil due to safety considerations and the quality of topsoil. The enclosed map outlines the approximate area of topsoil to .be left and the . soil type. As can be seen from the map, and also your field inspection, this area consists of extremely rocky, shallov soils with outcrops of sandstone interspersed with erosion channels. Additionally, the area is extremely • steep, presenting a safety hazard to equipment attempting to strip topsoil. As outlined in Section 4.9.1 of our permit, when these conditions are encoun- tered, topsoil will not be salvaged. The area proposed for exclusion from stripping of topsoil totals approximately 21 acres. This area accounts for less than 216 of the total topsoil to be stripped in Ashmore Pit in ]986 (Attachment 1). Field surveys shoe that approximately 4,130 cubic yards of low quality topsoil will be lost from the area. This equates [o an overall depth of only 1.44 inches ac roes the 21-acre area. This amount will cover only three acres of rangeland at the permitted replacement depth of ten inches. The area south and west of the proposed exclusion area has topsoil resources which are more than adequate [o offset this topsoil loss. As we discussed, this exclusion area is a buffer zone at the end of the pit. It is probable that most of this area vill not be disturbed. Hovever, if reclatsa[ion of these acres is required, sufficient inventory exists in stock- piles adjacent to the site and in the current year's stripping in Ashmore Pit. Our survey calculations show that an excess of 30,000 yards .will be hauled from [he area just south and west of the proposed exclusion area. This is sufficient yardage to reclaim the proposed exclusion area at an average depth of ten inches. • cont. • P.O. Box 187 Craig, Colorado 81628 REVISION APPRDVF~D DATE 7 ~ ' ~~ (303) 824-4401 ~~c#27