NUMEROUS LANDSLIDES WERE INITIATED ALONG ANCIENT SLIDE SURFACES
WHEN THE TOES OF DEEP COLLUVIAL MASSES WERE EXCAVATED DURING
HIGHWAY CONSTRUCTION IN 1968-69. COLLUVIUM THICKNESSES RANGED
17
FROM LESS THAN 2 m TO MORE THAN 30 m AND AVERAGED ABOUT 15m.
SHEAR STRENGTH VALUES CALCULATED FOR LIMITING EQUILIBRIUM OF
TWO OF THE SLIDE MASSES WERE