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ELK CREEK QUARRY <br /> ROCK MASS CLASSIFICATION EVALUATION <br /> ALH <br /> 7/27/2004 <br /> UPPER WEATHERED ROCK GENERAL ROCK <br /> 1. RQD VERY POOR TO POOR POOR TO GOOD <br /> (Estimated-No Core Data) (SAY VERY POOR) (SAY FAIR) <br /> 2. RMR <br /> Al 2(5-25 MPa) 7 (50-100 MPa) <br /> 2 3(c25%) 13 (50-75%) <br /> 3 _ 8(60-200mm) 10 (200-600mm) <br /> 4 10 (Discontinuity Condition) 25(Discontinuity Condition) <br /> 5 15 (Dry) 15(may) <br /> B • <br /> 0 Very Favorable/Stopes 0 Very Favorable/Slopes <br /> C 38 Class IV(Poor Rock) 70 Class IV(Good Rock) <br /> D 25 Estimated Friction Angle 40 Estimated Friction Angle <br /> 3. Q' <br /> RQD 15 70 <br /> in 17 10 <br /> Jr 3 3 <br /> Ja 4 2 <br /> Jw 1 1 <br /> SRF 1 1 <br /> Q' 0.66 (Very Poor) 10.50 (Fair to Good Rock) <br /> 4. GSI 35 Disintegrated to Blocky/Disturbed w/ 65 Very Blocky w/Goad to Fair <br /> Very Poor <br /> 33 (Check;RMR-5) 65(Check;RMR-5) <br /> JC 00793 <br /> PetersonfElk Creek <br />