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TableofContents AdrianBrown <br />4.2.1 Potential for Groundwater Impact 8 <br />4.2.2 Potential for Groundwater Impact <br />During Construction 10 <br />4.2.3 Potential for Groundwater Impact <br />After Reclamation 10 <br />4.3 Impact Evaluation Verification 12 <br />4.3.1 Cripple Creek Mining District <br />Model 12 <br />4.3.2 Verification of Passage of <br />ECOSA Seepage into Bedrock 13 <br />4.3.3 Verification of ECOSA Seepage <br />to Carlton Tunnel 14 <br />4.3.4 Verification of Groundwater Flow <br />Impact of ECOSA 14 <br />5. CONCLUSION 15 <br />6. REFERENCES 16 <br />ListofTables <br />Table 1 - Cresson Mine Precipitation 18 <br />Table 2 - Surface Water Flow in Grassy Valley 19 <br />Table 3 — Vertical Hydraulic Gradients 20 <br />Table 4 — ECOSA Acid -Base Accounting 21 <br />Table 5 - ECOSA Pore -Water Sequestration and Seepage 22 <br />ListofPlates <br />Plate 1 - CC &V MLE -2 Facilities 24 <br />Plate 2 - ECOSA Site 25 <br />Plate 3 - Cripple Creek Geology 26 <br />Plate 4 - Cripple Creek Diatreme 27 <br />Plate 5 - Grassy Valley Surface Water Flow 28 <br />Plate 6 - Conceptual Flow Model 29 <br />Plate 7 - ECOSA Design 30 <br />Plate 8 - ECOSA Earthquake Displacement 31 <br />Plate 9 - ECOSA Subgrade Material Properties 32 <br />Plate 10 - Factor of Safety of Reclaimed ECOSA Slopes 33 <br />1385E.20120224 ii <br />