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Total anticipated additional drill pad disturbance is 11.5 acres and temporary road disturbance is <br />5.7 acres for a total of 17.2 acres of additional temporary disturbance. A modified Table 2.05.4- <br />T1, Surface Disturbance Summary on PAP page 2.05-50a is attached herein. <br />Each borehole will be drilled 12 '/4 inch diameter to approximately 20 feet above the coal. 9 5/8 <br />inch steel casing is cemented into the hole to approximately within 100' of the coal. 7 inch <br />slotted steel casing will be installed to within 10 feet above the coal. Approximately 60 - 100 <br />feet of the slotted 7 inch pipe will be extended up or overlap into the 9 5/8 inch casing. <br />Drainage and Sediment Control <br />The drainage and sediment control system for these Elk Creek mine gob vent boreholes will be <br />consistent with the previously constructed Elk Creek Mine and Sanborn Creek Mine gob vent <br />boreholes. The drainage and sediment control for the Elk Creek Mine borehole sites will be <br />managed as a small area exemption with alternative sediment control provided by a combination <br />of perimeter sediment control berms/ditches and installation of straw bales, straw waddles or silt <br />fence, etc. to reduce flow velocity and trap sediment. To facilitate the control of upland <br />drainage, if the site is suitable, an upland clean water diversion will be constructed to reduce <br />overland flow into the effected area. Permit Map 2.05-M4 (4I' sheet) Drainage and Sediment <br />Control Plan provides a typical example of a drill pad lay out. Exhibit 2.05-E3, Drainage and <br />Sediment Control Plan, Section 9, Revised and New SAE's and Alternative Sediment Controls <br />provides typical designs and demonstrations for alternative sediment control and clean water <br />ditch scenarios. Exhibit 2.05-E3, Drainage and Sediment Control Plan, Section 6 contains <br />information regarding mudpit hydrology demonstrations. <br />The boreholes are completed in the overburden zone located above the D coal seam. To date, no <br />ground water has been encountered in this zone that would require pumping. <br />Bonding/ Reclamation Cost Estimate Considerations <br />As in the past, we are requesting that the Division prepare a cost estimate to complete the <br />reclamation activities. <br />We would like to also note that the boreholes will have the 9 5/8" casing cemented in place and <br />there will be no reason to mobilize drilling equipment to ream out the borehole. Consideration <br />for down hole reclamation should only include plugging the casing and sealing with cement <br />using a standard redi-mix concrete truck. <br />0 Page 3