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12 August 2011, RW-2. View to the south across the basin. Due to the large diameter of i <br /> the casing, centralizers were utilized on the drill rods so that the augers would stay on <br /> track with the casing and borehole. ' <br /> 12 August 2011, RW-2. View to the west along the north rim of the basin. Due to the ' <br /> large diameter of the borehole, 15-inch augers were utilized to completely destroy and <br /> remove the man-made materials. ' <br />