Geotechnical. Assume 18 borings, including one in I-8 near the proposed crossing. This work will include separate geotechnical reports for the open cut sections of piping and the trenchless crossing. 3.5.1.1 Open-Trench (cut-and-cover): The number and spacing of exploratory borings will be finalized during design. For the open-trench pipeline reaches, a truck-mounted, small-diameter, hollow-stem auger drill rig is proposed to advance borings to the target depths, however, an air-rotary or air-percussion drill rig may be substituted if effective refusal is encountered during auger drilling.
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Sources: Design Agreement, Design Agreement