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iiiiiiiiiiiiiiuiii <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Phone: (3031 8663567 <br />FAX: (303) 832-8106 <br />January 26, 1994 <br />To: Steve Renner <br />From: Jim McArdle <br />Subject: TBM Project (C-81-048) <br />aF cola <br />,~`~ 4 <br />N~ <br />~~ <br />Roy Rnmer <br />Go~rernor <br />hLChael B. Long <br />Division Dueaor <br />On January 24, 1994, Wally Erickson, John Nelson and I inspected <br />the Trinidad Basin Mine site in order to begin formulating the <br />final reclamation plan and bid document. "Ponds" numbered 22P5 <br />(22P4B) and 22P6 (22P4A) appear to be very stable. The inlet <br />portions of the spillway pipe can be cut to further limit the <br />amount of water retained on the uphill sides of the road. <br />Currently the "ponds" have a shallow conservation pool. Once the <br />culverts are cut, the ponds are nothing more than wide collection <br />ditches with a culvert under the access road. A small conservation <br />pool will likely-always remain. <br />We did not find any evidence of past or current road stability <br />problems at these locations. Our suggestion is to allow the road <br />and "ponds" to remain in place and cut the culverts to reduce the <br />amount of water which can be retained by either pond. Total <br />elimination of the ponds would cause the natural drainage to flow <br />over the road and down the long outslope resulting in erosion of <br />the outslope. <br />It is my understanding that the landowner has requested that the <br />two ponds remain. This would be a deviation of the approved plan <br />which requires that the ponds be removed. If this landowner <br />request requires an independent stability analysis, I would suggest <br />that the landowner pay the additional cost for the study. This <br />should not be a burden of the bond. <br />cc: Wally Erickson <br />John Nelson <br />Dan Hernandez <br />