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<br />OXBOW MINING, LLC. <br />ELK CREEK MINE <br />"TYPICAL" EXPLORATION/GOB VENT BOREHOLE DRILL PAD SAE DESIGN <br />General Conditions and Assumptions: <br />- Borehole pad sites may be located on variable slopes from flat to 1.51-1/1V <br />- Borehole pad sites may be up to 80'w x 1301 in size (0.25 acre) <br />- Borehole pad sites may contain up to 3 completed boreholes. <br />- Borehole pad sites may have one entry light use roadway or two entry light use roadways. <br />Topsoil Salvage: <br />- Where a topsoil resource is available, up to 12" of topsoil may be salvaged and stockpiled off the <br />side of the pad area with stockpile(s) marked with a "topsoil" sign. <br />- Brush and tree materials will be salvaged with topsoil materials. <br />- Many steep, rocky side slope areas (greater than 30% slope) will often contain little or no <br />salvageable topsoil resource. <br />- Topsoil stockpiles will be seeded and protected with slash, surface scarification, straw wattles, <br />silt fence, erosion control matting, or straw bales, etc. as needed to control erosion and runoff. <br />Mud Pits: <br />- Drill fluids will be collected in mud pits approximately 8'D x 10'W x 40'1 in size. <br />- During drilling, mudpits can be used to collect surface runoff from the pad areas to aid in the <br />control of runoff velocity and trap sediment. <br />- After drilling and borehole well string completion, mudpits are safely drained of fluids, and/or <br />removed by mixing with pad materials to "reclaim" the pits. <br />Sediment control: <br />Runoff and sediment control from the pads and associated areas can be controlled by a <br />combination of mudpits, berms, siltfence, straw waddles, seeding, straw bales, vegetation slash, <br />collection ditches and small sediment traps, rock protection, rock drains, drain pipe drops, etc. <br />After drilling is completed, often the drill sites will have mudpits filled and selected reduction of <br />perimeter slopes to serve as "interim" reclamation, while methane exhausters are operated. <br />See Attached Exhibit for a sketch of a "typical" borehole drill pad SAE site. <br />TR-67 <br />Revised April 2010