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stabilized with a combination of vegetation and riprap (where necessary). <br />SEDIMENT POND <br />One sediment pond is planned for the King II Mine. The sediment pond <br />is located at the southeast corner of the mine bench and sized to contain <br />the precipitation events as required by regulation. Surface runoff will <br />reach the sediment pond through a combination of sheet flow, berms, <br />culverts and "V" ditches. Detailed plans, certifications and maps can be <br />found in Appendix 11 and Maps King II -007, King II -007D, King II -007F <br />and King II -007G. The pond contains a primary spillway at elevation <br />7233' and an emergency spillway at elevation 7234'. The spillways are <br />both vertical 24" CMP risers with oil skimmers constructed as shown on <br />Map King II -007F, Detail 1. The spillways are always open. The <br />minimum magnitudes of storm events that will cause the spillways to <br />discharge, subtracting a 60% sediment clean-out level of 1.5 acre feet, <br />are as follows: <br />Primary Spillway: 4.36 acre feet - 1.5 acre feet = 2.86 acre feet <br />Emergency Spillway: 5.22 acre feet - 1.5 acre feet = 3.72 acre feet <br />TOPSOIL <br />Sufficient suitable topsoil resources exist in the Umbarg soil map unit to <br />provide topsoil replacement depths of six inches. This replacement depth <br />will require stockpiling and ultimate replacement of 16,133 cubic yards <br />of topsoil from the A and B horizons of the Umbarg series. Topsoil will be <br />salvaged and stockpiled using truck /shovel or scraper methods. Topsoil <br />will be salvaged and stockpiled during the operation in piles constructed <br />adjacent to the sediment pond and north of Coal Stack Tube #2. The <br />topsoil pile will be stabilized using the seed mix proposed for final <br />reclamation. To further minimize the potential for accidental <br />contamination, a berm will be constructed around the perimeter of the <br />toe of the topsoil piles. The berms will be of sufficient size (18" to 24" <br />high, 4' to 6' wide) to prevent machinery from intruding on the topsoil <br />stockpile. <br />GCC Energy, LLC King II Mine <br />Section 2.05.3 <br />Page 6 March, 2010 <br />