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MINREC, INC. <br />NORTH THOMPSON CREEK MINES <br />IMPOUNDMENT YEARLY INSPECTION <br />In accordance with Rule 4.05.9(14), all impoundments shall be inspected at least yearly to determine <br />if the impoundment has been maintained as designed, and in accordance with the approved plan and <br />the applicable regulations. This yearly inspection is for the impoundments located at the North <br />Thompson Creek Mines. <br />On March 25, 2002, I performed the required yearly inspections. I, J. E. Stover, have a wide variety of <br />experience in the design and construction of earth fill embankments. Nothing was observed during the <br />inspection that would indicate the ponds have a potential for failure. There was no appearance of <br />erosion, instability, structural weakness or other hazardous conditions. There are no required <br />monitoring procedures or instrumentation. There are no aspects which might affect stability and there <br />is no required maintenance. The long pond and treatment ponds T-1 and T-2 were full as expected. <br />T-2 was discharging into ouffall 001 at approximately 25 gpm. Sediment pond 9 and the refuse pile <br />sediment pond both had 6 to 18-inches of snow and ice impounded. <br />The impoundments have the following capacities: <br />IMPOUNDMENT CAPACITIES -ACRE FEET <br /> Water Sediment Total <br />Long Pond 0.35 N/A 0.35 <br />T-1 0.57 N/A 0.57 <br />T-2 0.57 N/A 0.57 <br />Pond 9 0.41 0.74 1.15 <br />Refuse Pile 0.90 0.64 1.54 <br />Notes: <br />1. Sediment capacities are based on as-built pond configuration. Sediment capacities may be <br />less than shown in the table because of interim sediment accumulation. <br />2. Long pond capacity based on a surface area of 7640 SF and a depth of 2-feet. <br />3. T-1 and T-2 capacities based on a surface area of 5000 SF and a depth of 5-feet. <br />4. Pond 9 capacity presented in Appendix 4-B on page P-9-3. <br />5. Refuse pile pond capacity presented on Drawing D-4-10. <br />To the best of my knowledge aid balieL~~ impoundments have been maintained as designed and in <br />accordance with the approv~et~,pl@r'8pgtj~able regulations. <br />~~ <br />t ~ <br />r/.^* ~ <br />n <br />/~ ~ L <br />o <br />ies E. Stover:.~~ Date <br />do Professigria~ngineer <br />Stca~ion ~10~~9~30 <br /> <br />.~~~/I <br />