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Project Description and Alternatives <br />The purpose of this project is to provide a means for the East Mesa Water Company to continue <br />providing irrigation water to shareholders while minimizing water loss and maintaining the operation <br />of the existing delivery system. Three alternatives were considered: <br />1. The no- action alternative. <br />2. Bore a new tunnel and or rebore and support existing tunnel. <br />3. Piping the ditch with 42 inch diameter HDPE plastic pipe for 1450 feet. <br />Alternative No. 1 was considered unacceptable since it means the East Mesa Water Company will <br />be subject to failure of the ditch due to collapse of the tunnel and continue to lose water due to <br />seepage. <br />Alternative No. 2 this alternative is not feasible because of accessibility and cost. <br />Alternative No. 3 was selected, since it is considered to be the least costly reliable approach. <br />The selected alternative, Alternative No. 3, involves purchase and installation of 1450 ft. of <br />HDPE plastic pipe to construct an inverted siphon to bypass the existing collapsing tunnel. Design <br />will be completed by the suppliers Glenwood Springs NRCS office Colorado State NRCS Engineer <br />and Staff.. This also includes needed concrete and other structural needs and rock riprap designed <br />by the Glenwood Springs Office of the Natural Resources Conservation Service (NRCS). NRCS is <br />preparing any additional engineering designs and cost estimates for the project. Engineering <br />design and plans as prepared by the NRCS will be provided. . <br />The estimated cost of the completed project is $550,000. The cost breakdown is summarized in <br />Table 1. The NRCS Preliminary Design report and detailed cost estimate are included in Appendix <br />D. <br />Table 1. East Mesa Water Company <br />Irrigation Ditch Lining Project - Cost Estimate <br />Estimated Budget: <br />Mobilization $5,000.00 <br />Earthwork $10,000.00 <br />Concrete inlet Structure 5 CY $10,000.00 <br />HDPE plastic pipe 1450 ft of 42 diameter $200,000.00 <br />Installation $275,000.00 <br />10% engineering and contingencies permits $50,000.00 <br />Total $550,000.00 <br />