2003-07-11_REVISION - M1980244

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 7/11/2003
• Doc Name: Phase IV PSSA Area Cert Report
• From: DMG
• To: Cripple Creek & Victor Gold
• Type & Sequence: AM8
• Media Type: D
• Archive: No

June 24, 2003 -i- 003-2203.7
• TABLE OF CONTENTS
1.0 INTRODUCTION
1.1 Project Description .................................................................................. ............................ l
1.2 Construction Quality Assurance/Quality Control ................................... ............................2
1.2.1 CQA Monitoring of Earthworks ..................................................... ............................2
1.2.2 CQA/CQC Monitoring of Geosynthetics Installation ..................... ............................4
1.3 Project Coordination ............................................................................... ............................4
1.3.1 Daily Construction Summary Reports ............................................. ...........................5
1.3.2 Weekly Construction Summary Reports ........................................ ............................ 5
1.4 Project Specifications .............................................................................. ............................5
1.5 Record Survey Documentation ................................................................ ........................... 6
1.6 Certification Boundary ............................................................................. ...........................7
1.7 Items Not Covered in Phase Nb PSSA Certification Report ................. ............................7
2.0 SUMMARY OF EARTHWORK CONSTRUCTION ........................... ..........................8
2.1 Underground Workings Remediation ...................................................... ...........................9
2.1.1 Remediation of Shafts, Stopes, and Shallow Surface Pits ............... .........................10
2.1.2 Remediation of Laterals/Inclines/Adits ........................................... .........................ll
2.2 Underdrains .............................................................................................. .........................11
2.2.1 Primary Underdrain ......................................................................... .........................11
2.2.2 Secondary Underdrain ..................................................................... .........................12
2.3 Leak Detection System ............................................................................ .........................12
2.4 Site Grading ............................................................................................. .........................13
2.5 Subgrade Preparation ............................................................................... .........................13
2.6 Soil Liner Fill ........................................................................................... .........................13
2.7 Bedding Fill .............................................................................................. .........................14
2.8 PSSA Composite Liner System ............................................................... ......................... IS
2.9 Low Volume Solution Collection System ................................................ .........................16
2.10 High Volume Solution Collection System ............................................... .........................16
2.1 1 Select Drain Cover Fill ............................................................................ .........................18
2.12 Drain Cover Fill ....................................................................................... .........................18
3.0 GEOSYNTHETICS INSTALLATION .................................................. ........................19
3.1 Underdrains .............................................................................................. .........................19
3.2 Leak Detection Trench ............................................................................. .........................19
3.3 PSSA Liner System .................................................................................. .........................20
3.4 Underground Workings Geogrid .............................................................. .........................21
3.5 High Volume Solution Collection System Riser Foundation .................. .........................21
4.0 EARTHWORK CQA TESTING AND MONITORING ....................... ........................22
4.1 Results of Laboratory Soils Testing ........................................................ ..........................22
4.1.1 Grain Size Distribution .................................................................... .........................23
4.1.2 Moisture Content ............................................................................. .........................24
4.1.3 Atterberg Limits ............................................................................... .........................25
4.1.4 Proctor Compaction Tests ............................................................... ..........................25
4.1.5 Permeability Tests .......................................................................... ..........................26
• 4.1.6 Bulk Specific Gravity ..................................................................... ..........................26
4.2 Field Testing and Monitoring ................................................................. ..........................26
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