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The No. 3 Mine, had two separate sources of discharge. One was from a point source <br />(spring) within the Mine that was piped directly to the surface. This good quality point <br />source of water was the source of the discharge from the No. 3 Mine, since the mine was <br />sealed in 1986. The water level in the mine fluctuated but no water, other than the spring <br />water, discharged directly from the mine for ten (10) years. During the second quarter of <br />1995, wet spring weather caused the mine to fill and begin discharging iron laden water. <br />In order to treat this iron laden water, a 4 inch diameter pipe was installed to convey the <br />discharge from the No. 3 mine to the long pond. The discharges from the mines were <br />combined effective August 11, 1995. <br />The water treatment ponds (long pond, T -1, T -2, and P -9) at the No. 1 Mine Site are <br />considered permanent and support the developed water resources postmining land use. <br />Additionally, the portal area, 36 -inch culvert, 6 -inch pipe, bridge, and pipeline corridor are <br />considered permanent to support the developed water resources postmining land use. <br />During 1990, the landowner (North Thompson -Four Mile Land and Mineral Corporation) <br />installed a pump in pond T -2 and pipeline to divert water to a stock tank. The buried <br />pipeline crosses the reclaimed area in an easterly direction. The pipe then turns south and <br />travels about 2,000 feet from the reclaimed area to the stock tank. A portion of the pipeline <br />is shown on drawings D -2 -5 and D -3 -2. <br />Ponds <br />Based on a vegetation survey performed during July 1992, a demonstration was made that <br />untreated drainage from the reclaimed mine site does not contribute additional suspended <br />solids above natural conditions. Therefore, sedimentation control was no longer required <br />at the No. 1 or No. 3 Mine Sites. See the discussion beginning on page 4 -19 for more <br />details. <br />Pond P -1 was a depression to dissipate energy in front of a culvert located between the <br />No. 1 Mine and the No. 3 Mine. The pond was backfilled and reclaimed late in 1994. <br />Permit Renewal 4 -ii (Rev. 03/13) <br />