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Logan Wash Mine TR No. 6 <br />assembly outside of the trench and lowering the pipe into the trench through the use of the <br />excavator. <br />If mine drainage water is available after pipeline installation, the line will be tested for flow <br />integrity prior to backfilling. Trench backfilling will be conducted with care so as not to damage <br />the pipe. Where possible, finer graded material will be used as initial backfill material. Upon <br />completion of backfilling, the excavator will be used to compact the backfill. The pipe <br />alignment will be marked with identifying metal stakes at approximately 300 foot spacings. <br />OSHA health and safety requirements and compliance with the site specific health and safety <br />plan will be strictly adhered to. <br />Reclamation of the mine roads and benches will be conducted as described in TR No. 4. <br />4.0 Mine Discharge Monitoring <br />The discharge of the Research Mine water will occur adjacent to L-1 mine-water discharge in <br />upper Dry Gulch. The L-1 mine water quickly infiltrates into the colluvium and therefore does <br />not flow a significant distance on the surface. OOSI will monitor NPDES Outfa11001 in <br />accordance with their existing permit. In accordance with the permit, discharging mine water <br />that flows to the location of Outfal1001 is subject to sampling activities. <br />OOSI will conduct monthly monitoring of the Reseazch Mine portal area and drainage system <br />during the first full season of operation. All vault fittings will be inspected for leakage and flow <br />integrity. Because flow from the mine is seasonal, monitoring will be discontinued once flow <br />has ceased emanating from the drainage pipe. Periodic inspections of the mine discharge system <br />will be conducted in subsequent seasons consistent with normal mine inspection visits (3 to 4 <br />visits per year). <br />Western Water & Land, Inc. <br />