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possible reductions in flow due to impounded water. The water augmentation <br /> plan discusses the available water which will be used should impacts be <br /> identified. WFC currently has rights to a sufficient quantity of water to supply <br /> all users associated with the mining activities, plus an additional quantity of <br /> water that can be used to mitigate any impact to downstream users. <br /> Effects of sediment pond discharge on surface water quality: The effects of <br /> sediment pond diversions on surface water quality will be negligible because the <br /> structure has been designed to minimize impacts to the hydrologic balance. The <br /> diversion involves such minor areas of disturbance that chemical and sediment <br /> changes in the flow will be unmeasurable. <br /> Effects of runoff from reclaimed areas on the quality of streamflow: Due to the <br /> relatively small area of disturbance in the New Horizon 2 mining area, any <br /> reductions in runoff will have only a minimal impact on streamflow quantity, as <br /> flow in Calamity Draw is dominated by irrigation return flow. Decreased <br /> sediment loads predicated by SEDCAD+ and HEC 2 indicate that reclamation <br /> efforts conducted in the mining area will ensure that additional contribution of <br /> suspended sediment in runoff from reclaimed areas will not occur. Based on past <br /> operating history at the Nucla Mine, no significant trend toward higher <br /> concentrations of the selected parameters have been detected. In addition, the <br /> pond discharge will be monitored in accordance with NPDES discharge <br /> limitations and any potential impact will be identified. Therefore, runoff from <br /> the reclaimed area should have no significant impact over time on the quality of <br /> receiving stream water quality. As a result, post mining land uses which <br /> currently occur in the area should not be affected due to the mine plan which has <br /> been approved. <br /> 2. muned to be of a relative short-term nature, <br /> All probable impacts have been dete <br /> of minimal significance, or a plan has been presented to mitigate those <br /> determined to have some significance. As a result, mining affects to current land <br /> uses should be minimal. A detailed report is included in Section 2.04.7 and <br /> Table 2.05.6(3)-1 of the permit application. <br /> III. Topsoil <br /> A. The Division has determined that, for most soil types within the New Horizon 2 permit <br /> area and the PR-05 revision area, lower portions of the B horizon and portions of the <br /> C horizon shall be segregated and replaced as subsoil in order to ensure soil <br /> productivity consistent with the approved post-mining land use (4.06.2(3)). Salvage <br /> of topsoil and subsoil in two separate lifts will be employed for all map units occurring <br /> on irrigated pastureland and irrigated hayland. For these soils, the A horizon and <br /> upper portions of the B will be salvaged in one lift, with lower portions of the B and <br /> 23 <br />