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NORTH THOMPSON CREEK MINE <br />LONG POND CERTIFICATION <br />The long pond is located at the reclaimed North Thompson Creek No. <br />1 Mine site. It was constructed during September 1989. The <br />construction of the long pond was originally certified on September <br />26, 1989. <br />The embankment of the long pond was redesigned during 1992 to bring <br />it into compliance with the current rules. The design calculations <br />for the long pond are contained in Appendix 4-B, Pages P-9-5 <br />through P-9-7. The location and further design information for the <br />pond is shown on drawing D-2-5, No. 1 Mine Seepage Control and <br />Treatment Pond Plan. <br />In accordance with Division of Minerals and Geology's Rule <br />4.05.6(10), this certification has been prepared to document the <br />reconstruction of the mine water settling pond. i, J. E. Stover, <br />P.E., certified the design of the long pond. I have a variety of <br />experience in the design and construction of earth fill embankments <br />and sediment ponds. <br />The pond embankment was fortified during June 1993. To the best of <br />my knowledge and belief the mine water settling pond was <br />reconstructed in accordance with the approved plan except the <br />emergency spillway was installed on the west end of the pond <br />instead of the east end as shown on drawing D-2-5. The pond design <br />meets the requirements of the regulations of the Division of <br />Minerals and Geology except the top width of the embankment is only <br />4-feet wide. See permit page 4-66i for a discussion rule <br />4.05.6(11)(h) regarding the top width of the~~~~1f.~nt. <br />~. r No. 1923~r~ <br />.P .~ ~~ ~ <br />~ i ~fS' • ...... •'~G~i ~ <br />~"' <br />