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TABLE 1 <br />SUMMARY OF STABILITY ANALYSES <br />CASE <br />DESCRIPTION <br />FAILURE PATH <br />Entry / Exit Allowed <br />SHEAR STRENGTH PARAMETERS (Mohr - Coulomb) <br />FACTOR <br />OF SAFETY <br />Spoil <br />Clay <br />Rock <br />Degrees <br />psf <br />Description <br />Degrees <br />psf <br />Description <br />Degrees <br />psf <br />Description <br />1 <br />Only failure paths through spoil <br />considered <br />From spoil toe to spoil crest <br />35 <br />750 <br />Mean <br />2.1 <br />1a <br />30 <br />0 <br />Low -bound <br />- <br />- <br />1.4 <br />2 <br />Failure paths through spoil and clay <br />considered <br />From base of clay at toe to <br />second bench and above <br />35 <br />750 <br />Mean <br />31 <br />0 <br />Mean <br />(CU Test) <br />1.9 <br />2a <br />From spoil toe to spoil crest <br />30 <br />0 <br />Low -bound <br />31 <br />0 <br />Mean <br />(CU Test) <br />1.4 <br />2b <br />From base of clay at toe to <br />second bench and above <br />35 <br />750 <br />Mean <br />23 <br />370 <br />Low -bound <br />1.8 <br />2c <br />From spoil toe to spoil crest <br />30 <br />0 <br />Low -bound <br />23 <br />370 <br />Low -bound <br />1.3 <br />3 <br />Failure paths through spoil, clay and <br />rock considered <br />In rock below toe of spoil to <br />second bench and above <br />35 <br />750 <br />Mean <br />23 <br />370 <br />Low -bound <br />30 5220 <br />Neutral Dip <br />2.2 <br />3a <br />30 <br />0 <br />Low -bound <br />23 <br />370 <br />Low -bound <br />30 5220 <br />Neutral Dip <br />1.7 <br />SUMMARY OF SHEAR STRENGTH VALUES CONSIDERED <br />SPOIL Low Bound - 30 degrees friction, no cohesion; Mean - 35 degress friction, 750 psf cohesion. <br />CLAY Low Bound - 30 degrees friction, no cohesion; Mean - 35 degress friction, 750 psf cohesion. <br />ROCK Neutral bedding orintation - 30 degrees friction; 5220 psf cohesion. <br />23 -1- 01105 -600 <br />