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f=� <br /> r <br /> Photo 5. Portals of the twin rock tunnels which provided access to the Dutch <br /> Creek Nos. 1 & 2 from 1988 on. Left tunnel was used for men and material <br /> haulage; the right tunnel contained the raw coal conveyor belt and mine <br /> utilities. Left portal has a concrete bulkhead about 150' inby the portal; <br /> the right hand tunnel is bulkheaded about 100' inby. No accessways have been <br /> left in either bulkhead, but each has a 6" dia. steel pipe drain valve at the <br /> base of the bulkhead. The left hand bulkhead is also penetrated by a 12" dia. <br /> PVC pipe drain line to provide for continuous drainage of the flooded <br /> workings. <br /> 1 <br /> Photo 6. Closeup of the 12" dia. PVC pipe drain line at the entrance to the <br /> right-hand tunnel. Water collecting in the No. 1 & 2 Mines is collected at <br /> the M-bed intercept with the tunnel (13000' to the west) and conveyed via the <br /> 12" pipe to surface. Providing for this continuous drainage will hopefully <br /> prevent any static head from building up on the upper bulkheads. The mine <br /> water drains at a steady rate of about 300 GPM and can be discharged into the <br /> Dutch Creek drainage without treatment. <br />