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1 <br />' <br /> MINREC, INC. <br /> ANNUAL HYDROLOGIC REPORT <br />1 PAGE 3 <br /> Graphs have been prepared which show quarterly water level and <br /> conductivity measurements for both wells. The water level <br /> measurements for the year were consistent with prior years data. <br /> The conductivity measurements were also consistent with prior <br />' years. The pH measurements for the wells were similar to prior <br /> years monitoring. <br />' MINE FLOWS <br />Water from the No.l Mine continued to be treated and discharged to <br />' North Thompson Creek during the year. During September 1989 a <br />third settling pond was constructed on site to handle the No. 1 <br />' Mine water. The new pond is referred to as the long pond. The <br />additional settling time provided by the long pond is adequate to <br />allow the iron to settle from the mine water and be in compliance <br />' for discharge into North Thompson Creek. No chemicals have been <br />added to the mine water since the long pond was put in service. <br />The long pond has worked very effectively. During 1991, 1992 and <br />' 1993 cattails and algae have flourished in the long pond an have <br />probably enhanced the treatment process. <br />' All of the water flowing into the No. 1 Mine is being allowed to <br />flow out of the mine into the treatment ponds. Measurements of the <br />water level in the mine are taken at two valves that penetrate a <br />' concrete bulkhead in the mine portal. One of the valves penetrates <br />the seal approximately 3 feet higher than the other. The water <br />level in the mine has been maintained below the upper valve and <br />above the lower valve during the year. Therefore, the level of <br />water inside the mine has been stable during the year. <br />' Two sources of water are piped from the No. 3 Mine to a manhole <br />located along the county road. One source is piped from a point <br />' source inside the mine. This source has been flowing since the <br />mine was sealed in 1986. Another source is pipe installed through <br />the lowermost mine seal. This pipe is designed to convey water to <br />' the discharge point after the No. 3 Mine is full. On August 13, <br />1993, the No. 3 Mine was noted as discharging a small amount of <br />water (+/- 1 gpm). A water sample was taken on that date from the <br />No. 3 Mine discharge point (007). No degradation of the water <br />quality was evident from the water discharging from the mine. On <br />August 17, 1993 the discharge from the lower portal of the No. 3 <br />' Mine had ceased. <br /> <br />