2020-11-05_REVISION - M1973021 ‎(12)‎

• Permit No: M1973021
• IBM Index Class Name: REVISION
• Doc Date: 11/5/2020
• Doc Name Note: Part 1 of 9
• Doc Name: Request For Amendment To Permit
• From: Aggregate Industries-WCR Inc.
• To: DRMS
• Type & Sequence: AM7
• Email Name: TC1
• Email Name: MAC
• Email Name: ECS
• Media Type: D
• Archive: No

Table of Contents
1. Introduction ................................................................................................... 1
1.1 General.................................................................................................. 1
1.2 Site Description...................................................................................... 1
1.3 Scope of Work....................................................................................... 2
2. Geology..........................................................................................................4
2.1 Regional Geology .................................................................................. 4
2.2 Morrison Quarry Site Geology ............................................................... 4
2.2.1 Rock Types................................................................................ 5
2.2.2 Structure.................................................................................... 7
3. South and West Quarry Studies ................................................................ 10
3.1 Geotechnical Studies........................................................................... 10
3.1.1 Pre-2017 Geotechnical Explorations ....................................... 10
3.1.2 2017 Geotechnical Explorations .............................................. 11
3.1.3 2018 Geotechnical Explorations.............................................. 11
3.2 Annual Inspections .............................................................................. 13
3.3 Groundwater........................................................................................ 13
3.4 3D Geological Model ........................................................................... 13
4. Laboratory Analyses................................................................................... 14
4.1 Pre-2017 Laboratory Analyses ............................................................ 14
4.2 2017 Laboratory Analyses................................................................... 14
4.3 2018 Laboratory Analyses................................................................... 16
5. Rock Mass Characterization ...................................................................... 18
5.1 Hoek-Brown......................................................................................... 18
5.2 Rock Mass Rating................................................................................ 20
5.3 Q-system ............................................................................................. 21
5.4 Rock Mass Characterization Summary................................................ 23
6. Stability Analyses Methodology ................................................................ 25
6.1 Key Assumptions................................................................................. 25
6.2 Kinematic Analyses ............................................................................. 25
6.2.1 South Quarry ........................................................................... 27
6.2.2 West Quarry............................................................................. 27
6.3 Rock Slope Stability Analyses ............................................................. 28
6.3.1 General.................................................................................... 28
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Aggregate Industries—Morrison Quarry GEI Consultants, Inc.
AM-07 Geotechnical Stability Exhibit November 2020