2020-11-05_REVISION - M1973021 (16)

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Morrison Quarry AM-07 Geotechnical Stability Exhibit DRMS Permit M-1973-021 Aggregate Industries WCR Inc South Quarry Morrison Quarry,Bench 6950,Section F.8+20 to 9+80 Strike and Dip Orientations: Average Strike Average Dip Direction Strike from Strike to Dip from Dip to Set 1(Primary 1) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Set 2(Primary 2) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Set 3(Secondary 1) 333 65 NNW 320 350 50 80 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Set 4(Secondary 2) 53 88 NE 40 60 85 90 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Set 5(Foliation) 353 36 N 310 10 5 80 Estimated Strength of Intact Rock Material: Designation: Compressive Strength Range Estimated in Field Very High(15) >250 Mpa(>36,260 psi) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- High(12) 100-250 Mpa(14,500-36,260 psi) X -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Medium- ---------------------------- -----High(7) 50-100 Mpa(7,250-14,500 psi) X -- ------------------ ------------------------------------------------ -------------------------------------------------------------------------------------- Moderate(4) 25-50 Mpa(3,625-7,250 psi) Low 2 ------------------- 5-25 Mpa 725-3,625 psi) ------------------- -------------------------------------------------------------------------------------------- Very Low(1) 1-5 Mpa(145-725 psi) Estimated Drill Core Quality(RQD) Designation: RQD Percentage Range Estimated in Field Excellent Quality(20) 90-100% -o------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- God Quality(17) 75-90% Fair -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Quality(13) 50-75% X Poor Quality(8) 25-50/o X -------------------------------------------------------------------------------------------------------------------------- Very Poor Quality(3) <25% ------------------------------------- -- Spacing of Discontinuities Set 1 Set 2 Set 3 Set 4 Set 5 Very Wide(20) >2m(>6.5 ft) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Wide(15) 0.6-2 m(2-6.5 ft) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Moderate(10) 200-600 mm(8-24 in) X X X -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Close(8) 60-200 mm(2.4-8 in) X X X -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Very Close(5) <60mm(<2.4 in) GEI Consultants, Inc. 19 of 122 Appendix C.2 November 2020