2024-02-01_REVISION - M1973021 ‎(2)‎

• Permit No: M1973021
• IBM Index Class Name: Revision
• Doc Date: 2/1/2024
• Doc Name Note: Adequacy Response 1
• Doc Name: Adequacy Review Response
• From: Holcim/HDR
• To: DRMS
• Type & Sequence: TR9
• Archive: No

Geotechnical Stability Exhibit
Engineering Evaluation of Highwall Design for the South Quarry of the Morrison Quarry

January 2024 | 15
Table 6 – Summary of Recent Direct Shear Testing
Boring Depth
(ft.) Material Joint Type
Normal
Stress
(psi)
Friction
Angle
(deg.)
Cohesion
(psi)
HDR-002 17.0-17.4 Granitic Gneiss Natural
Fracture 50/300/900 25.5 21.1
HDR-002 255.5-
256.0 Granitic Gneiss Natural
Fracture 50/300/900 36.6 26.9
HDR-002 294.7-
295.2 Qtz Pegmatite Natural
Fracture 50/300/900 32.7 29.1
HDR-002 344.7-
349.7 Granitic Gneiss Saw Cut 150/300/600 30.2 21.7
HDR-003 48.5-49.0 Granitic Gneiss Natural
Fracture 50/300/900 21.4 27.9
HDR-003 130.0-
130.3 Talc Gneiss Natural
Fracture 50/300/900 16.3 42.8
HDR-003 192.0-
192.3 Granitic Gneiss Natural
Fracture 50/300/900 38.2 31
HDR-004 66.1-66.3 Granitic Gneiss Saw Cut 150/300/600 30.4 31.5
HDR-004 121.0-
131.0 Qtz Pegmatite Saw Cut 50/300/900 25.5 9.9
HDR-004 383.0-
383.5
Hornblende
Schist
Natural
Fracture 50/300/900 15.8 31.1
HDR-005 59.0-59.4 Granitic Gneiss Natural
Fracture 50/300/900 22.8 26.3
HDR-005 111.0-
111.4
Hornblende
Schist
Natural
Fracture 50/300/900 32.7 17.2
HDR-005 194.0-
194.5
Talc Gneiss
with Quartz
Natural
Fracture 50/300/900 22.6 19.6
HDR-005 262.8-
263.0 Granitic Gneiss Natural
Fracture 50/300/900 29.3 43.7

4.2.2 Aggregate Property Testing
Laboratory testing performed for aggregate property evaluation was performed including LA
Abrasion per ASTM C535, Sulfate Soundness per ASTM C88, and Specific Gravity and
absorption per ASTM D6473. The results of the laboratory testing are summarized in the table
below.