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r~ <br />C <br />quality because the water leaving the Nu Mine adit meets all required effluent <br />standards. The water exiting the Nu Mine adit continues to be monitored to <br />insure that no adverse effects are occurring. <br />The probable effects of the mining operation upon surface water are also <br />projected to be negligible. All surface drainage from the disturbed area is <br />contained by the sediment control system. Discharge from the sediment pond <br />would flow through a vegetated swale at non-erosive velocities. It is <br />unlikely that any water discharge from the sediment pond would reach Ohio <br />Creek due to the small amount of flow and because water would infiltrate into <br />the moderately permeable soils within a short distance. If the discharge <br />water did reach Ohio Creek, the effects would be negligible because the <br />quantity of discharged water is small in comparison with the average flow of <br />Ohio Creek and the discharge will have met the required effluent standards. <br />Pursuant to Rule 2.07.6(2)(c) and based on all available information, the <br />Division finds that the operation has been designed to prevent material damage <br />to the hydrologic balance outside the permit area. <br />X. <br />imatological Information and Air Resources - Rul <br />and <br />Climatological information is found on pages <br />Resources information is found on page 9 and <br />application. <br />The area receives approximately 20 inches of <br />majority of this amount occurs as snowfall d <br />The Colorado Department of Health has stated <br />emission permit under the grandfather clause <br />2.04. <br />15-16B and i n Exhibit 7. Ai r <br />Exhibit 7 of the permit renews l <br />precipitation annually. The <br />gyring the winter months. <br />that the mine is exempted from an <br />of the Air Quality Control Act. <br />The operation is in compliance with the requirements of this section. <br />XI. Soils - Rules 2.04.9, 2.05.3(5), 2.05,4(2)(d) and 4,06 <br />Since mining at the O.C. Mine No. 2 began prior to statues requiring topsoil <br />salvage, no topsoil was salvaged in construction of the mine benches and <br />associated facilities. Topsoil was salvaged during construction of the <br />sediment pond in sufficient quantity (600 cubic yards) to respread to a depth <br />of 2 inches over the entire disturbed area. This depth generally would not be <br />adequate for reclamation, but the topsoil and subsoil are sandy looms with a <br />slightly acidic pH, low electrical conductivity, low SAR, and good to moderate <br />~ water-holding capacity. Thus, the mixture of topsoil and subsoil material is <br />of good quality for use as a plant growth media. <br />_1 p_ <br />