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9. The slopes of the excavation will be made a 411:1 V slope or flatter. The slopes <br /> will be graded as the excavation proceeds and vertical pit walls will not be <br /> necessary. <br /> 10. The dimensions will be as shown on Exhibit E—Mining Plan Map. The pit limits <br /> are rectangular in shape with leg lengths of approximately 1,000 feet long (N— S) <br /> and 650 feet wide (E—W) for an affected area of 15.0 acres within the excavated <br /> area. <br /> 11. There will be no depression left after mining operations are completed, no <br /> impoundments or drainage alterations will be left in the reclaimed area. <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 City of Wiggins. Total usage will be approximately 2 acre- <br /> feet. <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. This property is hilly with slopes facing West to North on the East side of the <br /> mining area. It is the intent to excavate the property so as not to allow any runoff <br /> from excavated area and not intersect any natural drainage ways. Adequate <br /> temporary berms (as shown on Exhibit E—Mining Plan Map), will be performed <br /> on the north and west sides of the mining areas to insure runoff water will be <br /> contained in the pit floor. The pit floor material is granular and water will <br /> percolate into the pit floor. Should it become necessary silt fences will be used as <br /> required along with berm maintenance. Runoff from water outside the excavation <br /> area, if necessary, will be diverted to its normal runoff pattern. <br />