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~~ <br />2.0 SITB INVESTIGATIONS <br />I - 2.1 INTRODUCTION <br />Field investigations, conducted by Rocky Mountain Geotechnical, <br />r - <br />consisted of: <br />r o general site reconnaissance and verification of earlier site <br />' observations; <br />r . <br />o field and site reconnaissance; <br />o drilling, sampling and visual classification; <br />o test pit excavation and density testing of existing fill <br />areas; <br />o installation of piezometers for monitoring of water levels; <br />o sampling of borrow materials. <br />The field investigation was conducted in a single phase performed <br />. over a period of approximately 3 days. The field investigation <br />- was conducted on August 2 through August 5, 1984. <br />2.2 FIELD INVESTIGATIONS <br />• Eight borings were drilled with a conventional auger drilling <br />rig, utilizing standard split-spoon, Shelby tube, and bulk <br />sampling methods. The drilling rig used in the program was a <br />CME45, supplied by P & P Drilling. Two additional borings were <br />placed beyond the toe of the slope for the installation of <br />• piezometers. Test borings were advanced with a power-driven <br />• rotary drilling rig to depths ranging from 17 to 55 feet. <br />Samples were obtained using a 2-inch OD split-barrel sampler. <br />Shelby tube sampling was attempted in several borings where <br />significant cohesive materials were encountered or expected to <br />~ 6 <br />