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2.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES - <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />• The dams containing the sedimentation ponds are constructed <br />using conventional steel bin wall construction. It utilizes a <br />reinforced concrete spillway and spillway apron. Plans, <br />specifications, and "as constructed" surveys axe as shown in the <br />Ponds, Impoundments, and Dams Appendix in Volume BA. <br />In 1982, GeoHydro Consulting, Inc. of Denver, Colorado, was <br />retained to complete the Phase III stability analysis, designing <br />the waste rock disposal facilities. Included was the design of <br />an additional sedimentation pond. The waste area sedimentation <br />pond was constructed in series with sedimentation ponds 3 and 4 <br />and was designed to hold increased sediment loads due to the <br />addition of disturbed area and runoff from additional areas. <br />The earthen embankment of the pond was constructed with on-site <br />colluvial soils and compacted to a maximum dry density of at <br />least 95$, as determined by the American Association of State <br />Highways and Transportation Officials Specification T99-74. <br />Refer to the Waste Disposal Appendix in Volume 6A for specific <br />information on the waste area sedimentation pond design and <br />construction. <br />These ponds remain in place and will during Phase I of the final <br />reclamation. " <br />In order to divert runoff from the two topsoil stockpiles <br />located to the south of the West Ridge Disposal Area, two <br />collection ditches were constructed. The ditches direct flow <br />• into Pond 3. The design for these ditches can be found in Volume <br />6, Surface Drainage Appendix of the permit. The ditches will <br />have 0.3" freeboard. <br />These ditches remain in place and will during Phase I of the <br />final reclamation. <br />The original culvert G was removed so that the upland flow is <br />directed towards culvert G'. The design for this culvert can be <br />found in Volume B, Surface Drainage Appendix of the permit <br />document. The design for both the above referenced ditches and <br />culvert were provided by Water Engineering Technology, Inc. <br />I• <br />Permit Renewal - 16 - 01/03 <br />RN-d4 (4~q~oy~ <br />/~/Z-la6 <br />