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should be of minimal significance. Contour ripping, mulching and revegetation have been <br />demonstrated to minimize soil erosion and will be used to mitigate the increased runoff potential until <br />the topsoil structure is developed. <br />Effects of sediment porxfs on diannel d~aracteristics and dw~nstraam users. Potential impacts of <br />sediment pond 007 on downstream users v~ill involve possible reductions in flow due to impounded <br />water. The water augmentation plan discusses the available water which will be used should <br />impacts be identified. VvFC currently has rights to a sufficient quantity of water to supply all users <br />associated v~ith the mining activities, plus an additional quantity of water that can be used to mitigate <br />any impact to downstream users. <br />Effects of sedimerrt pond d~sdiarge on surface water rnality. The effects of sediment pond <br />diversions on surface water quality v~ill be negligible because the structure has been designed to <br />minimize impacts tothe hydrologic balance. The diversion involves such minor areas of disturbance <br />that chemical and sediment changes in the flows v~ill be unmeasurable. <br />Effects of runoff from redaimed areas on the quality of streamFlow. Due to the relatively small area <br />of disturbance in the New Horizon 2 mining area, any reductions in runoff will have only a minimal <br />impact on streamflow quantity, as flow in Calamity Draw is dominated by irrigation return flow. <br />Decreased sediment loads predicated by SEDCAD+ indicate that reclamation efforts conducted in <br />the mining area v~ill ensure that additional contributions of suspended sediment in runoff from <br />reclaimed areas v~ill not occur. Effects of runoff from reclaimed areas on the quality of streamFlow. <br />Based on past operating history at the Nucla Mine, no significant trend towarcJ higher concentrations <br />of the selected parameters have been detected. In addition, the pond discharge v~ill be monitored <br />in accordance with NPDES discharge limitations and any potential impact will be identified. <br />Therefore, runoff from the reclaimed area should have no significant impact over time on the quality <br />of receiving stream water quality. As a result, post mining land uses which currently occur in the <br />area should not be affected due to the mine plan which has been approved. <br />Summary. The discussion presented herein of the probable hydrologic consequences of the revised <br />mine plan approved by WFC identifies the potential effects of mining. Table 2.05.6(3)-1 summarizes <br />the discussion by listing the probable hydrologic consequences and the results of the analysis of <br />each. As can be seen, all of the probable impacts have been determined to be of a short term <br />'~ (Revised 45967 2.04.7-46 <br />