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111111111141911••••••••••••••••••••11/•111••••41.41414140401110 <br />APPENDIX A: <br />South Quarry, Bench 6880 RMR Data <br />Morrison Quarry <br />133-23514-08002 <br />Discontinuity Persistence <br />Set 1 Set 2 Set 3 Set 4 Set 5 Set 1 was observed to be cut-off by foliation <br />Very Low (6) <1 m (<3.3 ft) Notes: in many cases on the highwall. Highest <br />Low (4) 1 - 3 m (3.3 - 9.9 ft) < 9 ft persistence at north end of highwall. <br />Medium (2) 3-10m(9.9-33 ft) <25it 10-30It <br />High (1) 10-20m(33-66 ft) <br />,Very High 0 >20 m >66 ft) Discontinuity Separation (Aperture) <br /> <br /> Set 1 Set 2 Set 3 Set 4 Set 5 <br />Very Tight Joints (6) <0.1 mm (< 0.003 in) < 0.003 in <br />Tight Joints (5) 0.1 - 0.5 mm (0.003 - 0.02 in) <br />Moderately Open Joints (4) 0.5 - 2.5 mm (0.02 - 0.1 in) 0.01 - 0.05 in 0.03 - 0.1 in <br />Open Joints (1) 2.5 - 10 mm (0.1 - 0.4 in) <br />Very Wide Aperture 0 >10 mm > 0.4 in <br />Discontinuity Roughness <br />Set 1 Set 2 Set 3 Set 4 Set 5 <br />Very Rough Surfaces (6) VR Notes: <br />Rough Surfaces (5) R <br />Slightly Rough Surfaces (3) SR SR SR Set 3 is undulating on the south end of the <br />Smooth Surfaces (1) SM SM highwall. All sets are approximately planar <br />Slickensided Surfaces 0 SL on the north end of the hi hwall. <br />Discontinuity Filling (Gouge) <br />Set 1 Set 2 Set 3 Set 4 Set 5 <br />Type clay, staining, shear, etc none (6) none (6) Slight clay (2) <br />Thickness up to 0.2 in <br />Estimated Compressive Strength <br />Seepage none, moist, dripping, etc none none none <br />Unweathered (6) UW <br />Slightly Weathered (5) SW <br />Moderately Weathered (3) MW <br />Highly Weathered (1) HW <br />Completely Weathered (0) CW <br />Residual Soil (0) RS <br />Discontinuity Wall Face Weathering <br />Set 1 Set 2 Set 3 Set 4 Set 5 <br />SW SW SW <br />RMR Classification: Good Rock 61 - 77 <br />Additional Notes: Rock is granitic gneiss or biotite gneiss. A shear zone or close joint zone with a lot of slough at the bottom of the slope <br />consisting of biotite and granitic gneiss is present from highwall stations 1+05 to 1+25. Joints are primarily planar with <br />minor folding in set 3 from highwall stations 0+75 to 1+05. This section has potential for a minor plane failure based on <br />joint orientations and field observations.