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• <br />Ground Water: Ground water was not encountered in most of the borings drilled at this site. <br />Borings 15, 16 and 18 encountered water at depths of 20, 27 and 48 feet, respectively. We <br />noted water levels at a depth of 47 feet in DH-42 and at a depth of 108 feet in DH-54. These <br />two holes were drilled by others and casing/completion data is unknown. Ground water <br />probably flows within the lowest part of the slide mass and on top of the failure surface in rock, <br />at considerable depth over most of the site. However, in the portal area, it is likely that the <br />ground water level is somewhat higher, due to the underdrainage contribution from the new slide <br />east of the portal, combined with the accumulations of underdrainage from the head of the <br />ancient slide to the north and west. Based on the available grading plans, the only apparent <br />critical areas for shallow ground water appear to be in the area of Boring 16, where a major cut <br />will be required for the haul road west of the breaker bench, and the deep cuts along the haul <br />road up the west side of the portal bench. <br />Inclinometers: For use in monitoring during the design and construction phase, we installed <br />three slope inclinometers, in Boring 10 (50.5 ft), Boring 18 (125 ft) and Boring 23 (110 ft). <br />These locations were chosen because of their proximity to an existing steep slope (Boring 10) <br />or proposed deep cut (Borings 18 and 23). At the time of this report, only the baseline reading <br />had been completed. Therefore, there is no data to compare witft [he baseline readings. Further <br />readings should be conducted in the late summer or fall of this year, prior to the initiation of <br />grading construction, and quarterly afterwards, at least through [wo spring wet seasons. <br />• 12 <br />