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1 <br />t MINREC, INC., NORTH THOMPSON CREEK MINES <br />' 1992 ANNUAL HYDROLOGIC REPORT <br />OCTOBER 1991 THROUGH SERTEMBER 1992 <br />INTRODUCTION <br />' The Operator completed reclamation of the North Thompson Creek <br />Mines during 1987. The No.l Mine was sealed during 1987 with the <br /> expectation that no water would discharge from it again. The No. <br /> 3 Mine was sealed, however pipes were placed in the lowest seal to <br />' allow water to drain from the mine. <br /> Current monitoring requirements are shown on pages 3-61 and 3-86 of <br /> the Permit. During 1988 page 3-86 was revised to include a <br />' requirement to analyze the discharge from the No. 1 Mine water <br /> treatment ponds annually in June. <br />' Monitoring data for this years report is segregated into the <br /> following appendices: <br />' Appendix No. Monitoring Data <br /> I North Thompson Creek <br />' Upstream & Downstream Water Quality <br /> II Refuse Pile Piezometera, D-lA & D-2A <br /> Water Level, pH, Conductivity b Graphs <br />' <br /> III Mine Water Level <br /> No. 3 Mine <br />' Iv Mine Discharge Quality <br /> No. 1 Mine & No. 3 Mine <br />' <br /> SURFACE WATER QUALITY <br />' Appendix I contains the water quality information collected for <br /> North Thompson Creek. The quality information taken on North <br /> Thompson Creek, in May and September, is designed to monitor <br />' quality at the approximate high and low flow. <br /> The variation of the quality of North Thompson Creek as it passed <br />' the mines this year was similar to that which would be expected <br />from the baseline monitoring data and the fact that the Abandoned <br /> Mined Lands peat bog water treatment system is discharging into the <br /> creek between the upstream and downstream water monitoring points. <br />1 <br />1 <br />~' <br />