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there are no suitable existing reservoirs near their system that would be effective as an equalizer for <br /> the Platte Valley Canal. <br /> Construction Alternative 1 - Construct Platte Valley Reservoir No. 1 <br /> This alternative considers construction of a reservoir with 431 acre-feet of storage capacity to <br /> provide storage and to act as an equalizer for the system. This alternative includes the following <br /> work. <br /> 1. Construct a 431 acre-foot reservoir as shown on Figure 2 by excavation of the site to <br /> elevation 4822 feet and by placing a dam embankment to elevation 4836 feet. <br /> 2. The reservoir will be constructed with 10:1 upstream slopes in lieu of providing <br /> upstream slope protection and the downstream slope will be at a 3:1. The reservoir <br /> bottom will be lined using clay from the required excavation as necessary to exclude <br /> groundwater. <br /> 3. Construct a outlet consisting of an inlet structure,48 inch reinforced concrete outlet <br /> conduit, and upstream control gate. The outlet will be configured to act as the <br /> principal spillway for the reservoir. <br /> 4. Construct an outlet structure which is also the control for the supply in the ditch and <br /> for filling the reservoir from the ditch. <br /> 5. Relocate the existing section of ditch from the split of the Platte Valley Canal and <br /> Evans Ditch to that shown on Figure 1. The relocation is necessary due to the <br /> location of the reservoir and will allow filling in the exiting ditch below the <br /> bifurcation with spoil from the required excavation. <br /> 6. Modify the existing bifurcation structure at the split for the Platte Valley Canal and <br /> Evans Ditch. This is necessary due to the relocation of the ditch and also to provide <br /> adequate control of the flow to the Platte Valley Canal for deliveries to FRICO. <br /> 7. Construct three (3) new Parshall Flumes in various reaches of the ditch. These are <br /> required as directed by the water court to support the augmentation plan. <br /> Alternative 2 - Construct Platte Valley Reservoir No. 1 <br /> This alternative considers construction of a 531 acre-foot reservoir to provide storage and to act as <br /> an equalizer for the system. Alternative 4 is similar to Alternative 3 in all respects except the dam <br /> embankment upstream slope will be reduced to a 3:1 and riprap slope protection utilized on the <br /> upstream face. The additional reservoir capacity is due to added volume with the reduction in <br /> embankment volume and additional excavation area available due to the smaller embankment. <br /> COST ESTIMATE <br /> The complete breakdown of the cost of the work proposed for Alternative 1 and Alternative 2, <br /> respectively, are shown in TABLES 2 and 3. The costs are based on our past experience with <br /> similar projects and also from data supplied by local contractors and suppliers. Quantities were <br /> based on a topographic map of the reservoir site provided to us by the Platte Valley Irrigation <br /> Platte Valley Irrigation-Feasibility Study Page 5 <br />