2014-02-07_REPORT - M1980244 ‎(7)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 2/7/2014
• Doc Name: Final Report QA Monitoring and testing volume 1 of 2 doc 1of3 Mill Site Earth works
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: d
• Archive: No

Cripple Creek & Victor Gold Mining Company
Mill Site Earthworks Project
Final Report amec 10
Quality Assurance Monitoring &Test Results
January 31, 2014
CONTENTS
1.0 INTRODUCTION ................................................................................................ ..............................1
1.1 Project Description ................................................................................ ..............................1
1.2 Construction Quality Assurance /Construction Quality Control .............. ..............................1
1.2.1 CQA Monitoring of Earthworks ................................................. ..............................2
1.2.2 CQA /CQC Monitoring of Geosynthetics Installation ................. ..............................3
1.3 Project Coordination .............................................................................. ..............................3
1.3.1 Daily Construction Summary Reports ...................................... ..............................4
1.3.2 Weekly Construction Summary Reports .................................. ..............................4
1.4 Project Specifications ............................................................................ ..............................4
1.5 Record Survey Documentation ............................................................. ..............................4
1.6 Certification Boundary ........................................................................... ..............................4
2.0 SUMMARY OF EARTHWORK CONSTRUCTION ............................................. ..............................6
2.1 Underground Workings Remediation .................................................... ..............................7
2.1.1 Remediation of Shafts, Stopes, and Shallow Surface Pits ....... ..............................7
2.1.2 Remediation of Lateral/ Inclines/ Adits ....................................... ..............................8
2.2 Secondary Underdrain ........................................................................... ..............................9
2.3 Site Grading ........................................................................................... ..............................9
2.4 Subgrade Preparation ........................................................................... ..............................9
2.5 Soil Liner Fill .......................................................................................... ..............................9
2.6 Mill Site Earthworks Composite Liner System ...................................... .............................10
2.7 Drain Cover Fill ..................................................................................... .............................11
3.0 GEOSYNTHETICS INSTALLATION ................................................................. .............................12
3.1 Secondary Underdrain .......................................................................... .............................12
3.2 Underground Workings Geogrid ........................................................... .............................12
3.3 Mill Site Earthworks Liner System ........................................................ .............................12
4.0 EARTHWORK CQA TESTING AND MONITORING ......................................... .............................13
4.1 Results of Laboratory Soils Testing ...................................................... .............................13
4.1.1 Grain Size Distribution ............................................................. .............................14
4.1.2 Moisture Content ..................................................................... .............................15
4.1.3 Atterberg Limits ....................................................................... .............................15
4.1.4 Proctor Compaction Tests ....................................................... .............................16
4.1.5 Permeability Tests ................................................................... .............................16
4.2 Field Testing and Monitoring ................................................................ .............................16
4.2.1 Underground Workings ............................................................ .............................17
4.2.2 Secondary Underdrain ............................................................. .............................17
4.2.3 Overburden /Structural Fill ( OVF) ............................................. .............................18
4.2.4 Soil Liner Fill ............................................................................ .............................18
4.2.5 Drain Cover Fill ........................................................................ .............................19
4.2.6 Temperature Monitoring .......................................................... .............................19
5.0 GEOSYNTHETICS QC SUBMITTALS .............................................................. .............................20
5.1 Geomembrane Installation Personnel Resumes .................................. .............................20
5.2 Geomembrane QC Documents ............................................................ .............................20
5.2.1 Resin QC Certificates .............................................................. .............................20
5.2.2 Roll QC Certificates ................................................................. .............................20
5.2.3 Welding Rod QC Certificates .................................................. .............................21
5.3 Geotextile QC Documents .................................................................... .............................21
5.4 Geogrid QC Documents ....................................................................... .............................21
6.0 GEOMEMBRANE CQA TESTING AND MONITORING ................................... .............................22
sAprojects \1125k mill site earthworks \h2 - design \cert reports \mill site earthworks \cc &v mill site roc report.docx