2004-06-29_PERMIT FILE - C1981038A

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§2.04 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES --MINIMUM REQUIREMENTS FOR INFORMATION ON ENVIRONMENTAL RESOURCES. 2.04.11 Fish and Wildlife Resources Information. Refer to Volume I -Text, Section 2.04.11 for a discussion of mine related effects to fish and wildlife. This section concludes that mine development could impact endangered fish species by degrading water quality or by depleting the flow in the upper Colorado River. Surface drainage from the train loadout and stockpile facilities is controlled by two sediment ponds. Because of the surface water drainage control, no significant water quality degradation is expected to occur. Refer to Exhibit 2 for a report by the United States Fish and Wildlife biological opinion concerning, among other issues, the impacts of the operation of the train loadout and stockpile area. The effect the mine development will have on the endangered fish species of the Colorado River Basin is usually determined by estimating the annual depletion of water from the upper Colorado River caused by mine development. The consumptive use of water associated with the mine includes water used for dust suppression, showers and personal use and losses due to evaporation. The addition of the train loadout and stockpile area will add to the depletion calculation presented in Volume I, Section 2.04.11. Anew depletion worksheet is included with this permit revision. The addition of the train loadout and stockpile area will add 4.4 AC-FT to the annual depletion rate at Bowie No. 2 Mine by increasing the evaporation and dust suppression components as follows: Sediment Pond Evaporation Loss There are two sedimentation ponds located at the train loadout and stockpile area. These ponds have a combined surface area of .33 acres. With an evaporative loss of 34 inches per year, the sediment ponds at the loadout will contribute 0.9 AC-FT per year to the total depletion at the Bowie No. 2 Mine. TR-20 2.04 - 31 3/01