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I I I I I I I I I I I I I I I I I I I B. 3) Rll.i. for Cost Estimation Unit costs for construction were obtained from bid tabulations and reference books. These costs have been adjusted for the difficult working conditions and access problems. For the pipeline, it is estimated that at least 2 hours travel time will be needed for the work crews on a daily basis. In addition, construction can only occur during the period from May through November due to the higher elevation. A 20% contingency has been added to the construction cost and engineering has been estimated at 20%. Engineering assumes full time inspection of the project. Interest during construction was not included in the comparative cost analysis; however, it will be added to the selected alternative cost estimate. BASIS FOR CAPACITY OF PIPELINE AND/OR RESERVOIR. 1. Criteria Pipeline Alternatives As a safety factor, it will be assumed that the Cottonwood Creek pipeline is the sole means of water delivery to the water plant. Although the Rapid Creek pipeline can provide some water, it will not be included in sizing since it is unreliable on a daily basis due to its age and condition. Also, the Rapid Creek pipe cannot take water from Cabin Reservoir or Kruzen Springs. In a dry year, Cabin Reservoir and Kruzen Springs may be the only reliable sources with adequate supply. There is a 5.0 MG treated water storage tank below the plant which can be used to provide supplemental water if peak: demand exceeds water plant production. However, it may not be large enough to carry the plant through a multi-day period of maximum day demands. Therefore, to assure a reliable supply, the new pipeline must be capable of providing all of the maximum day demand at the Palisade water plant for the design period. In addition, Palisade has previously provided supplemental water at the Ute plant, and that policy will continue for the near future. An allowance will be made for that water flow. Reservoir Alternatives. If an equalizing raw water reservoir is constructed, it must be designed to provide equalizing storage for release during the maximum demand months during the summer. It would continue to receive flow from the existing pipeline as it releases water to the water plant plus any supplemental water required at the Ute plant. 2. Palisade Water Demands. Maximnm Dll.}' Demand (l'ipeline). For purposes of this analysis, it will be assumed that a water conservation program will have been implemented by the year 2025 that will reduce per capita maximum day demand to 530 gallons per day. For the year 2025 (based on 6100 users), the total maximum day demand is estimated to be 3.2 MGD. V-6