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<br />During post-mining reclamation sediment ponds P-3, P-9, and refuse <br />disposal area will remain intact until the requirements of Rule <br />4.05.2 are met. <br />A vegetation survey of the reclaimed mine sites was performed <br />during July 1992. The results of the survey are presented in <br />Volume II, Appendix 3-W. This survey shows that the disturbed <br />areas at the mine site have been vegetated and stabilized. <br />The calculations on the following pages 4-19i through 4-19iii <br />demonstrate that the run-off from the reclaimed areas does not <br />contribute additional suspended solids above natural conditions. <br />Since the disturbed areas at the mine site have been vegetated and <br />stabilized and run-off from the reclaimed areas does not contribute <br />additional suspended solids above natural conditions, then <br />sedimentation control at the North Thompson Creek Mine sites is no <br />longer required. The mine water treatment ponds, (long pond, T-1 <br />and T-2), will be constantly utilized. Pond P-9 and the refuse <br />pond may be periodically used to store mine water seepage from the <br />passive mine water treatment system. Ponds P-1, P-2, P-3, P-4, P- <br />5, P-6, P-7 and P-8 will be reclaimed. <br />The land owner has verbally expressed an interest in keeping ponds <br />on site to provide stock water storage. For this reason the water <br />treatment ponds, pond P-9 and the refuse pond will not be <br />immediately reclaimed until the issue is resolved with the <br />Division. <br />Culverts <br />All the culverts were designed using methods in "Handbook of Steel <br />Drainage and Highway Construction Products". Calculations for the <br />culverts are in presented in Appendix 4-B. <br />4.3.15 Toosoil Removal, Handling and Storage <br />Final development of the refuse disposal site yielded approximately <br />1,000 cubic yards of topsoil. Topsoil was removed to a depth of 12 <br />inches after any vegetative cover present was removed, but before <br />any surface disturbance occurred. <br />Approximately 2,000 cubic yards of topsoil is stockpiled near the <br />refuse disposal area. The stockpile is in a protected, bermed site <br />away from drainageways (see Drawing D-4-8). The stockpile was used <br />during the reclamation of the mine site. Further detailed <br />discussion of the above is found in Section 4.4, "Reclamation Plan <br />for the Mine". <br />• <br />4-19 10-14-94 <br />