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<br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />1. Field Sampling and Testing <br /> <br />A field sampling and testing program was completed to deter- <br /> <br />mine the following: <br /> <br />o <br /> <br />Depth of the underlying Mancos Shale. <br />Physical properties of soils in the slide mass. <br />Collect samples for formalized laboratory testing. <br /> <br />o <br />o <br /> <br />Drilling began on October 8, 1986 and Was completed October <br /> <br />10. 1986. <br /> <br />A CME-45 drilling rig was used to drill a series of six <br /> <br />boreholes. An eight inch hollow stem auger (3-In inch inside diameter) <br /> <br />was used on Boreholes One and Two (BH-I. BH-2) and a four inch solid <br /> <br />, <br /> <br />stem auger Was used for Boreholes Three through Six (BH-3 through <br /> <br />BH-6). Piezometers were installed in Boreholes One through Four. The <br /> <br />locations of boreholes are shown on Figure 11-2. A borehole schematic <br /> <br />and descriptive log was prepared for each borehole and is located in <br /> <br />Appendix B. <br /> <br />Boreholes Were drilled to depths from twenty-five to seventy <br /> <br />feet. <br /> <br />The Mancos Shale bed was <br /> <br />not encountered in any <br /> <br />of the six <br /> <br />boreholes. <br /> <br />Field inspections of surrounding topography indicates the <br /> <br />shale bed dips to the east at an angle of approximately 340 from the <br /> <br />horizontal. An outcrop of Mancos Shale is visible at the top of the <br /> <br />II-2 <br />