2014-08-19_PERMIT FILE - C1980007 ‎(10)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/19/2014
• Doc Name: Haul Road Geotechnical Design Method
• Section_Exhibit Name: Exhibit 82 Appendix H
• Media Type: D
• Archive: No

Refuse Pile Expansion East
TR -128
Haul Road Slide Repair Documentation, Slope Stability Monitoring
Instrumentation, and Drainage Revisions
May 2012, Revised December 2012
Table of Contents
1.0 Introduction and Background.................................................................................................................. l
1.1 Background.................................................................................................................................1
1.2 Report Organization....................................................................................................................
2
2.0 Haul Road HR -1 Slump.........................................................................................................................3
2.1 Site Characterization...................................................................................................................3
2.1.1 Geometry .......................................................................................................................
4
2.1.2 Groundwater.................................................................................................................. 4
2.1.3 Modeling Parameters..................................................................................................... 4
2.2 Repair Construction.................................................................................................................... 6
2.2.1 Identified Seepage Locations......................................................................................... 6
2.2.2 Construction Methodology............................................................................................ 6
2.3 Construction Observation...........................................................................................................
7
2.4 Final Conditions..........................................................................................................................
8
2.4.1 Approach to Slope Stability Analysis............................................................................
8
2.4.2 Modeling........................................................................................................................
8
2.4.3 Geometry .......................................................................................................................
9
2.4.2 Results............................................................................................................................9
2.4.2.1 Seepage Analysis.............................................................................................
9
2.4.2.2 Stability Analysis............................................................................................
9
2.4.3 Recommendations............................................................................................................10
3.0 Slope Monitoring Instrumentation.......................................................................................................12
3.1 Haul Road HR -1 Area...............................................................................................................12
3.1.1. Survey Mirrors.............................................................................................................12
3.1.2. Inclinometers................................................................................................................12
3.1.3. Piezometers..................................................................................................................13
3.1.4 Monitoring Schedule....................................................................................................13
3.2 RPEE Buttress and Refuse Pile Area........................................................................................14
3.2.1 Survey Mirrors.............................................................................................................14
3.2.2 Inclinometers................................................................................................................14
3.2.3. Piezometers..................................................................................................................
15
P:\Mpls\06 CO\26\06261003 Haul Road Slide Repair\WorkFiles\Report\MCC_Slump_Repatr-Instrumentation-Drain Rev 2012-12-12.docx i