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Table of Contents <br />Section 2.05.6(3) <br />Protection of the Hydrologic Balance <br />A) PROTECTION OF THE HYDROLOGIC BALANCE ...........................................2.05.6(3)-1 <br />Introduction........................................................................................................2.05.6(3)-1 <br />Ground Water Protection....................................................................................2.05.6(3)-1 <br />Ground Water Quality............................................................................2.05.6(3)-1 <br />Ground Water Quantity..........................................................................2.05.6(3)-2 <br />Ground Water Monitoring......................................................................2.05.6(3)-3 <br />Surface Water Protection................................................................................................2.05.6(3)-4 <br />Surface Water Quality........................................................................................2.05.6(3)-4 <br />Surface Water Quantity......................................................................................2.05.6(3)-5 <br />Surface Water Monitoring..................................................................................2.05.6(3)-6 <br />Water Rights and Alternative Water Supplies................................................................2.05.6(3)-6 <br />Introduction............................................................................................ <br />2.05.6(3)-6 <br />Water Rights Protection and Mitigation Plan ........................................2.05.6(3)-7 <br />Alternative Water Supplies.................................................................................2.05.6(3)-8 <br />Alluvial Valley Floors........................................................................................2.05.6(3)-8 <br />Introduction............................................................................................ <br />2.05.6(3)-8 <br />Geomorphology...................................................................................... <br />2.05.6(3)-8 <br />Irrigation................................................................................................. <br />2.05.6(3)-9 <br />Subirrigation........................................................................................... <br />2.05.6(3)-10 <br />Conclusion.............................................................................................2.05.6(3)-10 <br />Hydrology Monitoring Plan................................................................................2.05.6(3)-11 <br />B) PROBABLE HYDROLOGIC CONSEQUENCES...................................................2.05.6(3)-11 <br />1) Containment of pit inflow and impacts on water quality............................2.05.6(3)-14 <br />2) Interruption of groundwater flow and drawdown.......................................2.05.6(3)-14 <br />3) Impact on groundwater rights.....................................................................2.05.6(3)-15 <br />4) Impact of spoil material on groundwater flow and recharge......................2.05.6(3)-15 <br />Worst Case Discharge...............................................................2.05.6(3)-16 <br />Realistic Discharge....................................................................2.05.6(3)-17 <br />5) Potential impacts of replaced spoil on groundwater quality.......................2.05.6(3)-20 <br />Spoil Water Chemistry ..............................................................2.05.6(3)-20 <br />Spoil Water Infiltration into Lowwall .......................................2.05.6(3)-30 <br />6) Impact of spoil water quality on surface water quality...............................2.05.6(3)-31 <br />Spoil Water Quality...................................................................2.05.6(3)-31 <br />Timeframes of Elevated TDS in Spoil Water...........................2.05.6(3)-31 <br />Impacts to Receiving Waters.....................................................2.05.6(3)-33 <br />7) Effects of mining on the local geomorphology ..........................................2.05.6(3)-36 <br />8) Effects of sediment ponds on channel characteristics & downstream users <br />2.05.6(3)-36 <br />9) Effects of sediment pond discharge on surface water quality.....................2.05.6(3)-36 <br />10) Effects of runoff from reclaimed areas on the quality of streamflow .........2.05.6(3)-36 <br />Summary............................................................................................................. <br />2.05.6(3)-37 <br />Tables <br />Table 2.05.6(3)-1 Summary of Consequences of the Life -of -Mine Mining Plan ........... 2.05.6(3)-12 <br />Table 2.05.6(3)-2Water Quality Comparison - Overburden Water vs. Spoil Water....... 2.05.6(3)-23 <br />Table 2.05.6(3)-3 Flow Rates vs. TDS for Selected Surface Water Locations ...............2.05.6(3)-25 <br />Table 2.05.6(3)-4 Flow Rates vs. TDS for Spoil Waters and Receiving Streams ..........2.05.6(3)-35 <br />July 2016 (TR -74) <br />