2017-02-03_PERMIT FILE - C1980004 (2)

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2.04.7 Hydrology Description (3) Alternative Water Supply The proposed surface coal mining operations should not result in contamination, diminution, or interruption of an underground or surface source of water within the proposed permit area and adjacent areas for domestic, agricultural, industrial, fish and wildlife, or other legitimate use. The surface drainage system in the surface facilities area will not be interrupted. The mining operation could impact the surface drainage system by increasing the sediment load in the streams. This impact will be mitigated by passing runoff through sediment ponds or some other form of alternative sediment control. Mine water discharge could impact the surface drainage system by mixing mine water with surface water. The mine water and surface water are both high in total dissolved solids (TDS) so mixing mine water with surface water should not elevate TDS concentration in the surface water. East Salt Creek and Big Salt Wash are located west and east of the projected mine plan area respectively. The mine plan does not intersect either of the channels so mining will not impact either of the creeks. Domestic use of water in the permit and adjacent area is derived from wells completed in the East Salt Wash alluvium. The East Salt Creek alluvium will be protected from the effects of subsidence. Figure 1.1-3a Interests in Surface Property and Water Rights shows ditches, non -jurisdictional dams, stockponds and wells. All of the water rights are located below in elevation the coal seam to be mined. The United States Fish and Wildlife Service (USFWS), considers any consumptive use of water by the mine to deplete the flow in the Colorado River. Water depletions in the Upper Colorado River Basin have been recognized as a major source of impact to endangered fish species PR -02 2.04-28 03/13