Table 41 Twice] Soil Volume Chinge Characteristics* Unit Weight {threw . Loose Bank Compacted Swell Shrinkage Load Shrinkage 1%} 1%] Factor Factor Clay 2310 3000 3'50 30 20 0.?7 0.00 Common Earth 2430 3100 3450 25 10 0.80 0.90 Rock (blasted) 3060 4600 3550 50 -30** 0.67 1.30\" Sand and Gravel 2860 3200 3350 12 12 0.89 0.33 \"Exact Values vary with grain size distribution. moisture. compaction, and other factors. Tests are required to determine exact values for a specic soil. \"Compacted rock, unlike soil, is less dense than int-place rock. Data for this table was extracted from Reference 3, p. 33 Table 5-1 Eficicncy Factors For Earthmoving Operations Management Conditions Job Conditions Excellent Good Fair Poor Excellent . 0.84 0.31 ' 0.76 0.70 Good 0-73 0.75 0.71 0.65 Fair 0.72 0.69 0.65 0.60 Poor 0.63 0.61 0.57 0.52 Data for this table was extracted from Reference 3, p. 23 \f