2010-06-04_PERMIT FILE - C1982056A (9)

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In 2005, the unpaved eastern portion of the existing parking lot (approximately 130 x 180 feet) and the mine ready -line parking area west of the operations center, were leveled and regraded, with excavated material being used to fill -in and bring low areas up to a consistent grade. Road -base material was subsequently brought in and compacted over the • regraded parking areas to establish a suitable base for paving operations. These areas were then paved with approximately 3 -4 inches of asphalt paving material. The existing perimeter surface drainage systems were maintained or reestablished during grading, base preparation, and paving operations. Pave Parldng Area and HeUvad (MR07 220) - In 2007, in order to accommodate an increase in the number of employees working during each shift under a 12 -hour shift schedule, TCC proposes to regrade and pave the remaining portion of the East Employee Parking Area and truck staging area, and, in conjunction with grading/paving activities, to establish an Emergency Helipad. The Helipad will be established as part of our overall emergency planning and preparedness program to facilitate rapid evacuation and transport of a sick or injured employee(s) to a suitable medical facility for emergency care. The proposed paved area is an existing graveled parking area used for overflow parking and staging /tarping of coal haul - trucks. With installation and commissioning of the Truck Loadout and West Haulroad (TR's 06 -53 and 06 -55) truck traffic transitioned away from the Mine Entrance /Haulroad. Paving this area would help eliminate muddy conditions during wet weather and in the winter -time, and consequent dusty conditions when the mud dries and is pulverized by traffic. Paving will require minor grading work and over - excavation of existing drainage features (drainage ditches to be retained as paved swales); base preparation, consisting of grading and placement of additional road -base; followed by placement and compaction of approximately 4 (parking area) to 6 ( Helipad) inches of asphalt over an area of approximately 52,200 square feet. Prior to asphalt placement, approximately 220 feet of electrical conduit will be placed and stubbed -off to facilitate future installation of site lighting. On completion of paving operations, parking places and the helicopter landing zone will be marked with high- visibility reflective paint. Security Gate Installation (MR09 -240) - A Security Gate Installation is needed to enhance mine security and provide for better and more effective access control and training of mine visitors and vendors. The location of the proposed Security Gate Installation is on and adjacent to the Mine Entrance and Haulroad, as shown on Map 24, • Surface Facilities and Freshwater Systems, with details provided by drawings in Exhibit 49U. The proposed Security Gate Installation will involve the following: • Completion of grading and paving of an existing dirt parking/staging area (previously approved under MR07 -220) • Realignment of approximately 300 feet of the existing Ditch G -2 • Foundation preparation for a modular security building within the existing disturbed area • Installation of a waste -water holding tank (sub - grade) • Construction of a 12 x 12 x 1 foot poured concrete equipment pad • Installation of a 20 x 60 foot modular Security Building • Installation of a water tank (may be sub - grade) and connecting pipeline • Installation of a propane tank and connecting pipeline • Extension of a short powerline (up to 10 new powerpoles), and installation of a transformer and back -up generator • Construction of approximately 100 feet of security fence • Placement of concrete barriers Visitors and vendors entering the mine property will be required to stop and check -in at the Security Gate. Site hazard training and issuance of Personal Protective Equipment (PPE), will also occur at this location. The water tank will be filled from mine sources or by a contractor, and wastewater will be periodically pumped -out and hauled off -site by a contract disposal firm.. • In order to evaluate the existing septic system and leach field for future expansion at the mine a percolation test was conducted. Approximately six, 4 -inch diameter holes, 30 -48 inches deep were augured for the percolation test. After the test was completed, the cuttings were placed back in the hole. Also, an eight -foot deep backhoe pit was MR09 -240 2.05 -17.2 10/29/09