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TAB 17 <br /> PROBABLE HYDROLOGIC CONSEQUENCES <br /> List of Figures (Cont.) <br /> Figure No. Page <br /> 17-12 Drawdowns in the Coal Aquifer, Year 4 17-24 <br /> 17-13 Drawdowns in the Coal Aquifer, Year 5 17-25 <br /> 17-14 Relationship Between Acid Base Potential and Paste pH, <br /> Nucla East 17-41 <br /> 17-15 A Plot of Cadmium Concentrations Versus pH Based on the <br /> Geochemical Model PHREEQE 17-48 <br /> 17-16 Hydrograph of Well GW-N9, Giving Total Dissolved <br /> Solids Concentration 17-56 <br /> List of Tables <br /> Table No. Page <br /> 17-1 Nucla East Pit Inflow Calculations for the Overburden Aquifer 17-2 <br /> 17-2 Nucla East Pit Inflow Calculations for the Dakota Coal Aquifer 17-3 <br /> 17-3 Summary of Ground Water Aquifer Characteristics 17-5 <br /> 17-4 Simulated Average Daily Pit Inflow (ft3d) for the Coal and <br /> Overburden Aquifers for Each Year of Mining 17-26 <br /> 17-5A Effects of Nucla East Pit Pumpage Discharge on Calamity Draw <br /> Water Quality 17-31 <br /> 17-58 Effects of Nucla East Pit Pumpage Discharge on San Miguel <br /> Water Quality 17-32 <br /> 17-6 Overburden (Unit 1) Characteristics - Nucla East Area 17-34 <br /> 17-7 Interburden (Units 2, 3, 4) Characteristics - Nucla East Area 17-36 <br /> 17-8 Underburden (Unit 6) Characteristics - Nucla East Area 17-38 <br /> 17-9 Classification of pH of Water Samples from Nucla East Area, <br /> on the Basis of Stratigraphy 17-43 <br /> 17-10 Water Chemistry and Saturation Indices from Chemical Modeling 17-45 <br /> 17-11 Predicted pH's Resulting from Mixing of Water from GW-N20 <br /> and GW-N21, with Different Mineralogy Reactions 17-51 <br /> 17-12 Ranges of Total Dissolved Solids for Two Sites on Calamity Draw 17-53 <br /> iii Revised 04/11/88 <br />