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<br />,- <br /> <br />. <br /> <br />. <br /> <br />, <br /> <br />. Arrange meetings with the regulatory agencies indicated above and determine the permitting <br /> <br />requirements and anticipated schedules; <br /> <br />. Perform preliminary engineering analyses to determine the engineering construction <br />requirements of the project; <br /> <br />. Prepare a cost estimate for the permitting and engineering studies in conjunction with <br />revised construction cost estimate to develop a total cost for the recommended alternative; <br />and <br /> <br />. Perform a life cycle cost analysis and compare this alternate to the diversion tunnel <br />alternate to be evaluated by the SRK-BLI team as scoped in this proposal. <br /> <br />2.3 Evaluation of New Tunnel Alternative <br /> <br />The scope of work for this portion of the study consists of the layout, preliminary design and cost <br />estimate for a proposed tunnel parallel with and at a lower elevation than the existing Plateau <br />Tunnel. To the best of our knowledge, the proposed tunnel will be approximately 3,000 ft.long and <br />5- to 6-ft in finished diameter. Our present understanding of the subsurface conditions along the <br />tunnel alignment are based on the prominent outcrops in the steep bluffs surrounding the proposed <br />tunnel alignment and on the actual conditions exposed in the existing Plateau Tunnel. The <br />anticipated subsurface conditions along the tunnel alignment and on the actual conditions exposed <br />in the existing Plateau Tunnel. The anticipated subsurface conditions along the tunnel alignment <br />include fairly competent sandstone and/or dolomitic shale with moderate to widely spaced joints, <br />These rock units are cliff formers in the area and are anticipated to be hard, relatively unweathered <br />and contain a minimum of fractures and other discontinuities. It is anticipated that the western 500 <br />to 1,000 ft of the proposed alignment may contain rock with more closely spaced fractures and a <br />higher degree of weathering, <br /> <br />PROPOSED SCOPE OF WORK <br /> <br />The proposed scope of work for this portion of the feasibility study can be summarized as follows: <br /> <br />. Review existing data and reports prepared for the site for the project as well as existing and <br />available geologic, hydrologic, and topographic information about the site area; <br /> <br />. Make a site visit to perform detailed geologic mapping of the exposed rock conditions at the <br />proposed tunnel alignment. Particular emphasis will be placed on providing geologic details <br /> <br />4 <br />