Laserfiche WebLink
Cripple Creek & Victor Gold Mining Company Squaw Gulch Valley Leach Facility Design <br />CONTENTS <br />EXECUTIVE SUMMARY v <br />1.0 INTRODUCTION 1 <br />1.1 Project Description 2 <br />1.2 Scope of Work 4 <br />1.3 VLF Design History 4 <br />1.4 Design Criteria 5 <br />2.0 SITE DESCRIPTION 9 <br />2.1 Location and Topography 9 <br />2.2 Climate 9 <br />2.3 Geology 10 <br />2.4 Underground Workings 10 <br />2.5 Seismicity 12 <br />3.0 SITE SUBSURFACE CONDITIONS 13 <br />3.1 Previous Site Investigations 13 <br />3.2 Current Site Investigation 13 <br />3.3 Site Geotechnical Conditions 13 <br />3.4 Clay Borrow Investigation 15 <br />4.0 VALLEY LEACH FACILITY (VLF) DESIGN 17 <br />4.1 General 17 <br />4.2 Site Layout 18 <br />4.3 Staged Construction 18 <br />4.4 PSSA Embankment 18 <br />4.5 Valley Leach Facility (VLF) Foundation 19 <br />4.6 Underdrains 20 <br />4.7 Liner System 21 <br />4.7.1 Ore Storage Area (OSA) 21 <br />4.7.2 Squaw Gulch VLF Pregnant Solution Storage Area (PSSA) 21 <br />4.8 Leak Detection System (LDS) 22 <br />4.9 Low Volume Solution Collection System (LVSCS) 22 <br />4.10 High Volume Solution Collection System (HVSCS) 23 <br />4.11 Potential for Filtered Tailings Storage 24 <br />4.12 Appurtenant Structures 24 <br />4.13 Highway 67 Realignment and Crib Wall Construction 25 <br />4.14 Reclamation /Closure 25 <br />4.15 Technical Specifications 26 <br />5.0 GEOTECHNICAL ANALYSIS 27 <br />5.1 VLF Stability Analysis 27 <br />5.1.1 Methodology 27 <br />5.1.2 Input Parameters 27 <br />5.1.3 Stability Results 29 <br />5.2 Settlement 30 <br />5.2.1 PSSA Foundation 30 <br />5.2.2 VLF Foundation 30 <br />6.0 SURFACE WATER CONTROL 32 <br />6.1 Site Surface Hydrology 32 <br />6.2 Runoff Curve Numbers 33 <br />6.3 Diversion Analysis and Design 34 <br />6.4 Sediment Control 35 <br />Project No.: 74201125G0 <br />1 September 2011 <br />amec0 <br />