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GENERAL HYDROLOGY DESCRIPTION <br />The King I Mine was permanently sealed in January, 2009. The operation had <br />little impact on groundwater systems and its impact on the surface hydrology was <br />moderate. Operations in the upper Menefee coal seam were not expected to disrupt <br />aquifers, streams, water systems, or the small watershed (up-slope areas of the mine <br />site) . Hydrologic data obtained from the existing mine workings, core drill holes in <br />the mine plan area, and other research studies show that the mining operation has <br />had only a mild impact on water sources of Hay Gulch (See Appendix 4). <br />The mining bench is located in the upper reaches of the Hay Gulch drainage <br />system. All wells, diversion ditches, sedimentation ponds, water conveyances and <br />storage, and the surface facilities are shown on Map King I-007, the mine surface <br />drainage map. <br />DRAINAGE PLAN <br />The drainage plan for the National King I Mine consists of diversion of <br />uncontaminated water originating upstream of the mine yard, through the yard to <br />the discharge point at the north end of site. Runoff generated on the yard itself as <br />well as runoff from two small natural areas adjacent to the yard is collected and <br />routed through the sedimentation ponds. <br />Refer to 2.05.6 (Hydrologic Balance) and Appendix 11 for a detailed description <br />of Mine Surface Drainage and Sediment Ponds design and descriptions. <br />SUB -SURFACE HYDROLOGY <br />Generally, the King I mine did not encounter ground water during the course of <br />normal mining operations for process water. While in operation, it is estimated that <br />there was a consumptive use of 8.61 acre feet per year, for use as dust control. The <br />three continuous mining machines, each feeder breaker and belt transfer points were <br />sprayed to reduce dust. Process water was obtained by means of the two wells, one <br />located in the Hay Gulch Valley Floor, and the other on the mine bench, as shown on <br />Map King I-007. Occasionally, localized areas of water were encountered in the mine <br />floor. These were believed to be "perched" aquifers as they usually dried up after a <br />short time. <br />AQUIFERS <br />The King I Mine is not in a major groundwater recharge area. Research shows <br />this portion of the basin has had very limited ground water development. Most of the <br />wells in the general area have been completed in the unconsolidated alluvial gravels <br />and terrace deposits of the La Plata River and its tributaries (including Hay Gulch), or <br />in consolidated aquifers further south (down -dip) in the basin. Two formations, the <br />Cliff House sandstone and the Menefee Formation are important and relative to the <br />mining operations. The underlying Point Lookout sandstone will not be affected by <br />the mining operations. <br />CLIFF HOUSE SANDSTONE <br />This unit comprises the cap rock to the dip slopes of the area. Based on <br />information provided by the Menefee Land Company exploration drilling program for <br />a proposed coal mine bordering the King I Mine, the sandstone is not saturated and <br />is above the potentiometric surface in the immediate project vicinity. No water was <br />GCC Energy, LLC <br />Section 2.04.7 <br />Page 2 <br />King I Mine <br />November 30, 2015 (TR -24 AR#2) <br />