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mine are probably limited both in number and in areal extent. There is no documented use of any of these aquifers, nor is there any evidence to suggest that these aquifers supply base flow to any local steams or springs. Therefore, impacts to perched aquifers, and the Menefee Formation as a whole, will be minimal. The second ground water system identified near the permit area is the Hay Gulch alluvial aquifer. This aquifer system may be potentially affected by surface runoff from the mine bench or discharge from the sediment pond infiltrating into the alluvial body. This infiltration could cause localized increases in total dissolved solids within the alluvium. The probability of this occurring is minimal. The sediment control system at the King Coal Mine has been designed to minimize impacts to the prevailing hydrologic balance at and near the permit area. All surface runoff from the mine area will flow, via a series of conveyance culverts and ditches, to the sediment ponds, which are located on either side of the combination haul/access road adjacent to the alluvial valley. The sediment ponds, which are adequately sized to contain the runoff from a 10-year, 24-hour storm, will not discharge until a storm event of this magnitude has been exceeded. National King Coal has committed to an extensive water quality sampling plan, should the ponds discharge due to mine portal discharges. The sampling plan should be an effective method of determining the extent, if any, of impacts which are occurring to the alluvial aquifer system. It is thought, that, due to the great quantity of water transported within the alluvial aquifer, the effects of surface drainage to the AVF will be immediately mitigated. IV. Topsoil Information pertaining [o baseline soil inventory is presented in Section 2.04.9 of the permit application. Information pertaining to topsoil replacement is presented in Section 2.05.4. No baseline surveying of the soils was performed in the mine facilities area due to previous disturbances. Instead, a survey by the Soil Conservation Service was performed for adjacent, undisturbed areas. This survey identified three soil mapping units as addressed in Section 2.04.9 and depicted on Map C-6 of the permit application. Approximately 1.5 acres are to be disturbed at the end of the life of mine as a topsoil borrow area. The owner of the land has allowed access and rights for a topsoil borrow arm to be used for reclamation purposes. All available topsoil and suitable growth medium have been analyzed and the results are located in Appendix 9. The location of the topsoil borrow area is indicated on Map C-4. 17