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<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 /> <br />1-2 <br /> <br />3. <br /> <br />The capacity of the existing pipeline <br />during periods of high water demand. <br />in the service area exists. <br /> <br />has been reached already <br />No capacity for growth <br /> <br />4. The most cost-effective approach to improving raw water supply <br />capacity now is to construct a new pipeline, sized to carry <br />demands expected through the end of a 50-year period. <br /> <br />5. The selected alignment for a new pipeline is the same <br />alignment as the existing pipeline. <br /> <br />6. If a 3 percent per annum growth rate is assumed, a 30-inch <br />diameter pipeline is required to provide service for a 50-year <br />period. A 24-inch diameter pipeline will provide the same <br />period of service life if growth occurs at an average of 2-1/2 <br />percent per annum. <br /> <br />7. Construction of a hydroelectric facility on a new pipeline <br />shows a very marginal cost-benefit ratio. <br /> <br />8. The economics of building a hydroelectric facility will <br />improve as flow through the pipeline increases. <br /> <br />Recommendations <br /> <br />Recommendations arising out of this feasibility study are: <br /> <br />1. The Cortez raw water supply pipeline should be replaced with a <br />new line as soon as possible. <br /> <br />2. The program for design and construction of the ne\~ pipeline <br />should be followed as described in Table 1-1. <br /> <br />3. The new pipeline should be bid for both 30-inch diameter and <br />24-inch diameter as well as for ductile iron and concrete <br />materials. The new pipeline should be constructed along the <br />same corridor as the existing pipeline. <br /> <br />4. A hydroelectric power facility should not be built on this <br />pipeline at the present time. The City of Cortez should re- <br />evaluate the feasibility of such a facility in 5 years, when <br />pipeline flows will be higher and avoided power costs may be <br />higher. <br /> <br />BROWN AND CALDWELL C <br /> <br />CONSULTING ENGINEERS <br />