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• (Page 2) • MINE ID # OR PROSPECTING ID # K-94-117 INSPE'~CTION DATE 11/30/95 INSPECTOR'S INITIALS ACS OBSERVATIONS Haze].-A Tailinc Removal Proiect The contractor selected to complete the Hazel-A tailing removal project, Vac-n-Jet Environmental of Golden, Colorado, had mobilized a vacuum truck to the site. The vacuum trucY: was being used to suck water and tailing from behind the Hazel-A bulkhead into the trucl:'e holding tank. Once the holding tank was about half filled, the vacuum truck was pulled up the mine road to the tailing pond using a CAT DBH dozer, and the contents of the holding tank were discharged to the pond. The operator had segregated an area at the northwest corner of the pond to accept the holding tank discharges using a double row of hay bales. Two complete cycles of this operation were observed during the inspection, and the vacuum truck was found to be a very effective method for tailing removal, although the operation was proceeding considerably slower than was assumed in the Division's estimates of the coat of tailing removal. The vacuum truck intake and discharge hoses, and the holding tank„ provided complete containment of the tailings and water. Other Hazel-A Observations The coffer-dam installed to provide secondary containment outby of the Hazel-A bulkhead was raised to assure that the coffer-dam treat elevation was well above the elevation of the triggering float on the sump-pump. The reconfigured coffer-dam was found to be acceptable to the Division. The Hazel-A portal closure backfill was stabilized with chicken wire reenforced concrete. This stabilization was found to be acceptable to prevent access to all but the most determined trespassers or vandals. A Division finding on the acceptability of the portal closure for final reclamation will be withheld until the performance of the backfill can be observed over a period of time. Othec Tailinc Pond Observations Repairs to the pond liner were inspected. This could only be considered a partial inspection of the repairs because of drifted snow obscuring some of the lined areas. The liner was observed to have folded over at one location near the middle of the upstream face of the impoundment. This fold-over will have to be cut out, and the cut capped with an extrusion welder. Several holes were observed in the lined elope at the back (west side) of the pond. Moat of these holes were located above the crest elevation of the dam. It is reiterated that all liner flaws and defects must be repaired using an extrusion welding apparatus, and that all repairs must be vacuum tested. It is the operator's responsibility to carefully examine the entire lined area and identify any flaws that exist. The new strip of liner had been anchored into the crest of the tailing dam. The game fence surrounding the pond had been reestablished. Both of these jobs were well completed and acceptable to the Division. Other Site Observations 1. A hay bale was installed and keyed into the outlet ditch of the sediment pond located below and between the mill building and the pond. This work was found to be acceptable. The storm water containment berm below the ore bins had been reconstructed, compacted, and seeded. This work was found to be acceptable. The disturbed area above the tailing pond had been seeded, but was being compacted and torn up by the vacuum truck. There was no longer any trash, salvage, barrels, etc. at the site outside of the building.