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i <br />ID' • OCT 06'94 2020 Nl!o.015 P.02 <br />~~ • I~I IIIIIIIIIIIIIIII <br />~~ Cripple Creek & Victor Gofd Mining Company 999 <br />A Joint V"nlun - PIYao -esk MInMp Cunp"ny. Manv/er <br />~tt T OpanUon~ Ofhee Enylawooa Ollle~ <br />`~ PO. Box 191, 2755 Stele Highway 87 5251 DTC Parkway, Sulte 700, Englewootl <br />Victor, Colorado 80880 Colorado 80111 <br />(719) 8892977 • FAX (719) 689-3254 (303) 889-0700 • FAX (303) 889-0707 <br />October 6, 1994 <br />Mr. 13erhan Keffelew <br />Environmental Protection Specialist <br />Colorado Department of Nature! Resources <br />Division of Mines and Geology <br />Office of Mined Land Reclamation <br />1313 Bierman Street, Room 215 <br />Denver, Colorado 80203 <br />. ~,~ ~ <br />Reference: Cresson Project: Permit Number~,$0-244: Confirmation of Suitability <br />of 1?rnnomic Mill and Tunnel Wac_t@ Rock as Underdrain Mate~ja1. <br />Dear Mr. Keffelew: <br />As you remember, the original "plan," as described in the permit, was to use waste rock from <br />the Economic Mill Area as underdrain rock. The material was shown to be inert, however; the <br />material was never tested using the point load method. That was because we swiuhed to other <br />granodiorile as a result of not being able to disturb the Economic Mill Area until the 13LM <br />authorized such disturbance. <br />In view of the fact that we are now able to work in the area and because the rock is in the <br />immediate vicinity of the underdrein location, Golder has performed the point load tests. The <br />results are attached. The results demonstrate that the material meets the criterion. The <br />criterion, identified in your letter of Jttly 13, 1994, is 300 psi tensile strength. All samples <br />demonstrated tensile strengths well above this criterion. Therefore, we still (as we did in the <br />permit) plan on using the material as underdrain fill. <br />Should there be any questions, please call. We would plait on using this material quite soon in <br />view of the need to move it to complete the underdrain system and the proximity to the growing <br />trench in Arequa Gulch. <br />you fqr your assistance. <br />Affairs <br />Attachment: a/s <br />F1LB: CC&VSTIP.002 <br />