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MINE ID ~ OR PROSPECTING ID $ INSPECTION DATE 2 9 96 (Page 2) M-94-117 ~, INSPECTOR'S INITIALS ACS OBSERVATIONS A two man crew from Colorado Lining Company was on-site at the time of this inspection finalizing repairs to the tailing pond liner. The crew from Colorado Lining Company was being assisted by a three man crew provided by COM, Inc. The equipment and methods being employed by Colorado Lining Company to complete the liner repairs were extensively observed over a 4 hour period, and were found to be in accordance with the high standards expected of the eiynthetic liner industry in general. Actual vacuum testing of the repairs was not observed, however, the vacuum box apparatus was inspected and found to be acceptable. In certain locations around the periphery of the pond, the presence of ice made it difficult to expose the liner for inspection. It was determined that breaking the ice to remove it would result in additional damage to the liner, and that it would best to leave the ice in place. If any liner defects are exposed when the ice melts, they will have to be repaired. The Hazel-A adit was inspected. Backfill around the corrugated metal pipe that was used ae a portal closure ie beginning to separate from the back of the adit at the portal. Shis situation will have to be monitored and redressed if portal security is threatened. The pump-back system behind the coffer dam in the Hazel-A remains frozen, There was still aubst:antial freeboard behind the coffer dam at the time of this inspection. It ie clear that a tank heater will need to be installed to assure the performance of the pump-back system. See 1'B ,}1 on the last page of this report. Water was impounded at a level approximately half way up the Hazel-A bulkhead. The Hazel-A pumping schedule was interrupted to facilitate tailing pond liner repairs. Water from behind the Ffazel-A bulkhead will be pumped up to the pond as soon as the liner repairs are complete. Only very minor leakage through the bulkhead was observed. The plastic liner on the upstream aide of the Hazel-A bulkhead is still not adequately affixed to the rib. See PB f2 on the last page of this report. The operator reported on their intention to seal the borehole that enters the Hazel-A just inby of the portal. This i.e being done to prevent infiltration of water from the surface. This borehole carries various pipes and power lines into the adit. cc: Carl Mount Richard Fanyo Dufford and Brown 1700 Broadway, Suite 1700 Denver, CO 80290 Mark Steen P.O. Box 1523 Longmont, CO 80502 Bob Mason 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 Z 6 E Contact Address NAME Gwen Fraser OPERATOR Colina Oro Molino. Inc. STREET 3801 West Maroinal Wav, Sw CITY/STATE/2IP Seattle, WA 98106 ^ CE ^ BL ^ FS ^ HW ^ HMWMD (CH) ^ SE ^ WQCD (CH) ^ OTHER