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Parameter <br />Value <br />Typical solution application rate <br />Approximately 0.003 gpm/ft <br />Maximum solution application flow rate <br />17,000 gpm <br />Average area under leach <br />4.8 million square feet <br />As- delivered ore moisture content <br />5.6 percent (average 1998 and 1999) <br />Field capacity ore moisture content <br />7.5 percent (average) <br />Squaw Gulch VLF PSSA typical operating head <br />28 feet <br />Draindown period <br />12 hours <br />Precipitation fluctuations <br />95- percent confidence limit <br />Design storm event <br />100 - year /24 -hour <br />Squaw Gulch VLF Area (plan area) <br />15 million ft <br />Parameter <br />Value <br />Cresson ore shear strength <br />40 degrees and no <br />cohesion <br />Textured LLDPE geomembrane /SLF interface shear strength <br />23.5 degrees (large strain) <br />Operational design earthquake Peak Ground Acceleration <br />(PGA) <br />0.14 g <br />Closure design earthquake PGA <br />0.08 g <br />Minimum acceptable operational static factor of safety <br />1.3 <br />Minimum acceptable operational pseudo- static factor of safety <br />1.0 <br />Cripple Creek & Victor Gold Mining Company <br />Project No.: 74201125G0 <br />1 September 2011 <br />Other parameters influencing the water balance are presented in the following table: <br />Composite liner systems for the Squaw Gulch VLF were designed using the following <br />criteria: <br />Parameter <br />Soil liner fill (SLF) <br />Geomembrane <br />Drain cover fill (DCF <br />Soil liner fill (SLF) <br />Lower geomembrane <br />Low volume solution <br />collection fill (LVSCF) <br />Upper geomembrane <br />Drain cover fill (DCF) <br />Value <br />12 inches minimum (10 cm /s max.) <br />80 -mil LLDPE textured, single- sided, except where side slopes <br />are steeper than 2.5H:1V, where 80 -mil LLDPE textured, <br />double -sided is used. <br />2 feet minimum <br />12 inches minimum (10 cm /s max.) <br />100 -mil LLDPE textured, single -sided <br />3 feet minimum in PSSA <br />100 -mil LLDPE smooth <br />Squaw Gulch Valley Leach Facility Design <br />2 feet minimum, thicker over primary solution collection pipes <br />Stability analyses for the Squaw Gulch VLF were performed using the strength, <br />seismic, and factor of safety criteria presented in the following table: <br />Page 7 <br />ameee <br />