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March 2000 -ii- 993-2099.150 <br />• 4.8 Low Volume Solution Collection System .......................... ..................... 36 <br />4.8.1 Phase I and Phase II LVSCS .................................. ..................... 36 <br />4.8.2 Phase IV LVSCS ................................................ ..................... 36 <br />4.9 High Volume Solution Collection System .......................... ..................... 36 <br />4.10 Appurtenant Structures ............................................... ..................... 38 <br />4.11 Reclamation/Closure .................................................. .....................39 <br />4.12 Technical Specifications .............................................. ..................... 39 <br />5.0 GEOTECHNICAL ANALYSIS ................................................................ 40 <br />5.1 VLF Stability Analysis ...................................................................... 40 <br />5.1.1 Methodology .......................................................................... 40 <br />5.1.2 Input Parameters ..................................................................... 41 <br />5.1.2.1 Conceptual Stratigraphic Model ........................................... 41 <br />5.1.2.2 Geotechnical Material Design Parameters ............................... 42 <br />5.1.3 Stability Results ...................................................................... 46 <br />5.2 Settlement ..................................................................................... 48 <br />5.2.1 PSSA Foundation .................................................................... 48 <br />5.2.2 Pregnant Solution Storage Area on Ore Slope .................................. 48 <br />6.0 SURFACE WATER CONTROL ............................................................... 50 <br />• 6.1 Site Surface Hydrology ..................................................................... 50 <br />6.2 Soil Conservation Service (SCS) Runoff Curve Numbers ............................ 51 <br />6.3 Diversion Analysis and Design ............................................................ 53 <br />6.4 Sediment Control ............................................................................ 54 <br />7.0 WATER BALANCE ............................................................................. 55 <br />7.1 Water Balance Model ....................................................................... 55 <br />7.2 System Analysis .............................................................................. 56 <br />7.2.1 System Inflow Evaluation .......................................................... 56 <br />7.2.2 System Outflow Evaluation ........................................................ 57 <br />7.2.3 Water Management .................................................................. 59 <br />7.3 Discussion of Results for Phase IV ....................................................... 59 <br />7.3.1 Phase I PSSA ......................................................................... 59 <br />7.3.2 Phase II PSSA ........................................................................ 60 <br />7.3.3 Phase IV PSSA ....................................................................... 61 <br />8.0 USE OF REPORT ................................................................................ 63 <br />9.0 REFERENCES .................................................................................... 64 <br />• <br />I:\99\ip7NFlNAL REPpNTt099MAIN3.DOC Golder Associates <br />