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i, • (Page 2j MINE ID ~ OR PROSPECTING ID ¢ M-94-117 INSPECTION DATE 12/11/95 INSPECTOR'S INZTIALS ACS OBSERVATIONS Mark Steen, who owns land within the permit area ae well as adjacent land, and Bob Mason, representing the Town of Gold Hill, were present for this inspection. Tailing pond liner repairs were underway at the time of this inspection. Equipment in use included a diet sander, leieter, and a hot air type extrusion welder. Since the hot air type extrusion welder dose not have temperature control capability, welds completed using this apparatus would not be acceptable for the impoundment of tailing, however, based on visual inspection of the welds, the Division finds that they will be acceptable for the impoundment of water, ae long ae vacuum testing is completed to demonstrate that the welds do not leak. Prior to discharging any additional tailing to the pond, the dam would have to be raised in accordance with the approved permit, and any welds completed with the hot air extrusion welder would have to be capped using a temperature controlled extrusion welder. During this inspection, several holes in the liner were identified along the upstream face of ttie dam and elsewhere. It is reiterated here that all liner flaws and defects moat be repaired using an extrusion welding apparatus, and that all repairs must be vacuum tested. It ie the operator's responsibility to carefully examine the entire lined area and identify any flaws that exist. The extrusion welds completed by In-Line Plastics, Inc. and the extrusion welds completed by the operator to date, were visually inspected and generally found to be acceptable. The Fiazel-A adit was inspected. The Hazel-A bulkhead had been reconstructed subsequent to the trailing slimes removal project. The joints between the bulkhead and the rib and the joints between the bulkhead timbers had been caulked. The plastic liner on the inby aide of the bulkhead still had to be lapped to the rib using a rubberized sealant. The pump-back system outby of the Hazel-A bulkhead had been reestablished. The pump-back hose was found to be punctured, and will have to be repaired. Also, it was noted that the bracing for the decant system piping in the Hazel-A was over-stressed and needs to be upgraded. The operator reported that the bore-holes in the sill of the adit observed during the :L2/5/95 inspection had been grouted closed. cc; Carl Mount Richard Fanyo Dufford and Brown 1700 Broadway, Suite 1700 Denver, CO 80290 Mark Steen P.O. Sox 1523 Longmont, CO 80502 Bob Maaon P.O. Box 7060 Boulder, CO 80306 Evan Freirich 1942 Broadway, Suite 309 Boulder, CO 80302 Doug Parker P.O. Box 1077 Boulder, CO 80306 I & :E Contact Address ^ CE NAME Gwen Fraser ^ BL OPERATOR Colina Oro Molino, Inc. ^ FS STREET 3801 West Maroinal Wav, SW ^ HW CITY/STATE/ZIP Seattle, WA 98106 ^ HMWMD (CH) ^ SE ^ WQCD (CH) ^ OTHER