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MINREC, INC., NORTH THOMPSON CREEK MINES <br />2005 ANNUAL HYDROLOGY REPORT <br />INTRODUCTION <br />The Operator completed reclamation of the North Thompson Creek Mines during 1987. <br />The No.1 Mine was sealed during 1987 with the expectation that no waterwould discharge <br />from it again. The No. 3 Mine was sealed, however pipes were placed in the lowest seal to <br />allow water to drain from the mine. <br />During 1988, the No 1. Mine filled with water and started to discharge. The portal area was <br />excavated in order to control this seepage. One of the portals and a flooded air shaft were <br />exposed to control the mine seepage. Access to the portal was restricted by locked <br />wooden doors. A four foot thick concrete seal, which "dams" the seepage, was located <br />approximately fifty feet back from the doors. Two three inch pipes with valves penetrated <br />the seal. <br />The flooded air shaft was also a source of mine seepage water. There was a concrete <br />plug in the shaft which water flowed through or around. From 1988 until about 1995 only <br />about 15 gpm would flow around or through this concrete plug. Beginning in 1995 the <br />integrity of the plug degraded and the flow rate from the shaft began to increase. <br />As of June 1998, all of the seepage waterfrom the No. 1 Mine emerged from the shaft. No <br />water is impounded behind the portal seals. The water from the shaft is conveyed to the <br />long pond through a 6-inch PVC pipe. During late 1998, the Operator backfilled the portal <br />area. A 36-inch culvert was installed in the fill to provide access to the air shaft and the <br />inlet of the 6-inch PVC pipe. <br />During May 2002, the DMG approved a partial phase III bond release for the permit. The <br />remaining disturbed area is the developed water resource area and the flumes. The <br />developed water resource area encompasses the access road, No. 1 Mine portal, three <br />treatment ponds, sediment pond 9 as well and the pipeline corridor between the No. 3 <br />Mine and the first treatment (long) pond. <br />Current monitoring requirements are shown on pages 3-61 and 3-86 of the permit. <br />Monitoring locations are presented in Volume V of the permit on Map D-4-23. <br />Monitoring data for this years report is segregated into the following appendices: <br />Appendix No. Monitoring Data <br />North Thompson Creek -Upstream & Downstream Water Quality <br />II Mine Discharge Quality - Outfall 001 <br />