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Phase 2 Eastside <br />The depth to bedrock in this area is greatest in the middle of the mining cell. Therefore a worst case <br />scenario is represented by the middle of the east mining highwall of this phase. The soil profile <br />analyzed was based on a conglomeration of soil information from exploration locations L103-BHO1, <br />ET02-TP06, No.3, No.9 and MW-4. The model analyzed; a soil overburden that was 8 feet thick, a sand <br />and gravel layer that was 21 feet thick, and a total pit depth of 29 feet. The highest groundwater <br />monitored in the area was in MW-4 at an approximate elevation of 4731. <br />An overburden stockpile was placed east of the pit. No flood irrigation is near this mining cell; <br />therefore the piezometric surface was based on the site monitoring. <br />Phase 2 Westside <br />Due to the presence of flood irrigation to the west of this mining phase a second cross section was <br />analyzed on the west side. The depth to bedrock in this area is greatest in the middle of the mining cell. <br />Therefore a worst case scenario is represented by the middle of the west mining highwall of this phase. <br />The soil profile analyzed was based on a conglomeration of soil information from exploration locations <br />L103-BHO2 and MW-6. The model analyzed; a soil overburden that was 10 feet thick, a sand and gravel <br />layer that was 16 feet thick, and a total pit depth of 26 feet. The highest groundwater monitored in the <br />area was in MW-6 approximately 9 feet below the ground surface. <br />Flood irrigation, west of the mining cell, was simulated by raising the piezometric surface, at the <br />fenceline (40-feet from the mining highwall), above the highest monitored surface to the ground surface. <br />Phase 3 <br />The depth to bedrock in this area is greatest near the southern portion of the mining cell. Therefore a <br />worst case scenario is represented near the southern portion of the mining highwall of this phase. The <br />soil profile analyzed was based on a conglomeration of soil information from exploration locations <br />PA04-BHO2 and MW-14. The model analyzed; a soil overburden that was 6 feet thick, a sand and <br />gravel layer that was 9 feet thick, and a total pit depth of 15 feet. The highest groundwater monitored in <br />the area was in MW-14 approximately 9 feet below the ground surface. <br />No stockpiles are currently planned to be next to this mining cell. No flood irrigation is near this mining <br />cell; therefore the piezometric surface was based on the site monitoring. <br />Phase 4A <br />The depth to bedrock in this area is greatest near the western portion of the mining cell. Therefore a <br />worst case scenario is represented near the western portion of the mining highwall of this phase. The <br />soil profile analyzed was based on a conglomeration of soil information from exploration locations <br />PA04-BHO1 and PA04-BH11. The model analyzed; a soil overburden that was 5 feet thick, a sand and <br />gravel layer that was 8 feet thick, and a total pit depth of 13 feet. The highest groundwater monitored in <br />the area was in MW-7 approximately 8 feet below the ground surface. <br />An overburden stockpile was placed west of the pit. No flood irrigation is near this mining cell; <br />therefore the piezometric surface was based on the site monitoring. <br />Parsons Mine <br />DRMS 112 Permit <br />Page SE4 of SE8