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I I I I I I I I I I I I I I I I I I I 5-2 Cross country runs where no existing rights-of-way or easements can be identified are therefore avoided if possible and pipeline routes are normally selected to coinc ide with the publ ic rights-of-way, or existing easement corridors. ACcess to the pipeline is also a consideration which can influence the development of acceptable corridors. Cost of Operation. If the cost of operating or maintaining alternative pipeline routes varies between the alternatives, a present worth analysis will be carried out in order to identify the least cost alternative over the life of the facility. In this project, operational costs are not a major influence, however they have been considered in the alternative analysis reflected in the pipe size selection analysis in Chapter 4. Special Structures. Special structures include valve vaults, major lateral connections, river and highway crossings, pipe bridges, and other pertinent structures. Since these facilities tend to add significant cost, routes in which these are likely to occur must be studied carefully in order to assess the impact on the cost of the entire project. utility Interference. A study of potential interference with utilities over each of the pipeline routes is extremely critical in evaluating the desirability of a selected route. underground utilities can sometimes make it almost impossible to construct addi tional facil i ties wi thin the public right-of-way. Accordingly, utility locations are obtained from the various agencies and utility companies having jurisdiction in the area and comprehensive maps are prepared as required to show the exact location of all facilities within a given right-of-way. Selection of Alternative Routes The alternative routes selected for serious consideration are described below and shown on Figure 5-1. The alternate routes were chosen principally on the basis of maximizing the use of public right-of-way, use of existing easements, minimizing land acquisition, and minimizing pipeline length. Alternative 1. Alternative 1 begins at the Dolores Turnout and runs on Montezuma Water Company's property along the east lateral to the existing raw water supply pipeline intake. Alternative 1 then parallels the existing pipeline alignment across open farm and grazing land to the recently constructed highway crossing. Alternative 1 connects into the new crossing and then parallels the existing alignment to the water treatment plant. Alignment 1 generally falls on privately-owned property within the easements previously described for the existing raw water supply pipeline, with the exception of the easement required on the Montezuma Water BROWN AND CALDWELL C CONSULTING ENGINEERS