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MINREC, INC. <br />NORTH THOMPSON CREEK MINES <br />2017 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 31, 2017, 1 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 <br />the 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 other than quarterly and yearly inspections. There are no <br />aspects which might affect stability and there is no required maintenance. The long pond and <br />treatment ponds T-1 and T-2 were full as expected with approximate water level elevations of 7522, <br />7515 and 7511 respectively. T-2 was discharging to Pond 9 at approximately 5 to 10 gpm. Pond 9 <br />was full and overflowing (less than 5 gpm) to a ditch that flows to the refuse pond. The water <br />elevation in Pond 9 was approximately 7503. Water depth in treatment ponds T-1 and T-2 is <br />approximately 4 to 5 -feet. The refuse pond had a pool with a water level of about 7421. <br />The impoundments have the following capacities: <br />IMPOUNDMENT CAPACITIES - ACRE FEET <br />Water <br />Sediment <br />Total <br />Long Pond <br />0.35 <br />N/A <br />0.35 <br />T-1 <br />0.29 <br />N/A <br />0.29 <br />T-2 <br />0.24 <br />N/A <br />0.24 <br />Pond 9 <br />0.53 <br />0.42 <br />0.95 <br />Refuse Pond <br />0.81 <br />0.50 <br />1.31 <br />Notes: <br />1. Capacities are based latest digital topography. <br />To the best of my knowledge and, belief the impouoents have been maintained as designed and in <br />accordance with the approv�plan and applicati(g gulations. <br />Ib <br />e <br />J AS aSt�`; Date <br />Colorado,#d mori4' beer <br />Registra�(d1idQ liw8e <br />