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10. The slopes of the excavation will be made a maximum of 4H:1 V slope or flatter. <br /> The slopes will be graded as the excavation proceeds and permanent vertical pit <br /> walls will not be necessary. <br /> 11. The Pit Boundary dimensions will be as shown on Exhibit E—Mining Plan Map. <br /> The pit limits are irregular, the Westerly pit boundary line is 750 feet,Northerly <br /> pit boundary line is 290 feet, Easterly pit boundary line is 750 feet and the <br /> Southerly line is 290 feet. <br /> 12. Water will be used within the pit will be for dust control only. The source of this <br /> water will be from the Town of Kit Carson. Total usage will be approximately 1 <br /> acre-foot. We will have a written agreement for purchasing water from them. <br /> 13. A storm water management plan will be filed with the Colorado Department of <br /> Health to maintain the hydrologic balance. <br /> 14. This excavation is into virgin ground. It is not anticipated that any foreign <br /> materials will be encountered. If some were encountered, they would be disposed <br /> of in a manner to prevent unsightliness and protect the drainage system from <br /> pollution, as determined for the specific material. <br /> 15. Since the before and after use of the land is rangeland, minimal change will result <br /> to the hydrologic balance, no off-site damage will occur and the slopes and other <br /> general configuration of the land will be more stable for the current and reclaimed <br /> use due to elimination of existing erosion(caused by normal natural wind and <br /> water action over time) in the stable, steeper than 4:1 slopes. No standing water <br /> will be retained longer than 24 hours. In addition, the excavated area will be <br /> mulched to eliminate topsoil erosion. <br /> 16. Excavation will be kept above the known ground water elevation since the mining <br /> will be done out of the side of a hill therefore the operation will not require any <br /> type of dewatering. <br /> 17. A water well is located within a quarter mile, permit#138326, has a depth of 50'. <br /> Since we are only mining 8' deep ground water should not be an issue. <br /> 18. This property is fairly flat with slopes facing East on the West side of the mining <br /> area. It is the intent to excavate the property so as not to allow any runoff from <br /> excavated area and not intersect any natural drainage ways. Adequate temporary <br /> berms (as shown on Exhibit E—Mining Plan Map), will be built on the South and <br /> East sides of the mining areas to ensure runoff water will be contained in the pit <br /> floor. The pit floor material is granular and water will percolate into the pit floor. <br /> Should it become necessary silt fences will be used as required along with berm <br /> maintenance. Runoff from water outside the excavation area, if necessary, will be <br /> diverted to its normal runoff pattern. <br />