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<br />repayment periods and interest rates; the ultimate source of funds for <br />repayment; and a detailed schedule of estimated annual revenues and <br />annual expenditures for the entire period of debt retirement. <br /> <br />e) An analysis of institutional problems and requirements for project <br />implementation. The major item to be considered herein is obtaining a <br />right-of-way from the Bureau of Land Management. Almost all of the <br />pipeline route follows land administered by BLM. They will require an <br />environmental assessment of the impact of a pipeline replacement project, or <br />a reservoir (if the latter is constructed on their land). A Corps of <br />Engineers permit will probably be required since the pipeline crosses a <br />stream in several locations. Water rights should not be a problem since the <br />Town has senior water rights in the basin; however, the system will have <br />to be designed so it does not injure junior water right holders. <br /> <br />f) Any special technical problems which should be taken into considerntion. <br />This would include items associated with construction and operation. <br />Specific areas of concern in the Cottonwood Creek area are operation <br />during cold weather conditions, problems with rock excavation, access to <br />the remote site, effect on water quality of any proposed modifications, <br />maximizing use of all intakes along the route, preventing vacuums and <br />surges in the pipe, and accommodating high pressures if the pipeline is <br />pressurized. <br /> <br />4. Construction Considerations and Cost RlI.is. <br /> <br />a) Factors to Consider in Pipeline Construction. There are several things that <br />will make pipeline construction difficult for this project. The site is located <br />in a narrow, rocky canyon, with the only access being a rough, dirt road. <br />It is anticipated that considerable ledge rock will be encountered during <br />excavation. Working room will be limited, in part due to environmental <br />constraints which may be imposed by BLM, and also due to physical <br />constraints. Much of the pipeline will be installed in or adjacent to the <br />existing road. There are several places where the road crosses steep <br />hillsides and the room available for the trench, excavated material, pipe <br />storage and heavy equipment is very limited. It is probable that material <br />taken from the trench will have to be used for backfill, since it may not be <br />possible to import material. Much of this backfill material may have large <br />rocks in it. All of the above will influence the selection of pipe material <br />and the overall cost. <br /> <br />a) T~ of Pipe. There are several types of pipe that are normally used for <br />water transmission lines: ductile iron pipe (DIP), plastic pipe (pVC), steel <br />pipe, and reinforced concrete pipe. Normally concrete pipe and steel pipe <br />are used for larger diameter projects. Reinforced concrete pipe is relatively <br /> <br />V-3 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />