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Table F.1 in Appendix F, is estimated at $166,500, which is considerably less than the potential <br />profit from the sale of material contained within the setback. The 440 feet setback is shown on <br />Figure 2.1 for comparison to the chosen alternative. Refer to the May 1, 1998 Ayres Associates <br />report included as .Appendix A for further details on the grade control structure. <br />3.3 System Capacities and Operation <br />The general operation of the system as proposed is straightforward. Water contained in <br />any one of the upper three ponds will be released through the gated culverts into Pond 4 where it <br />can be pumped intro the outlet ditch, measured, and released to the river. In the case of Kehn's <br />augmentation watf;r, the Boxelder Ditch diversion that feeds the property will be released into <br />the uppermost augmentation pond and subsequent apportionment will be made from there. <br />Hydraulic structures were sized based on the average historic maximum monthly inflows and <br />probable maximurn and minimum releases of Kehn augmentation water. Flows released from <br />storage in order to satisfy return flow requirements of the augmentation plan vary from 0.04. cfs <br />to 0.5 cfs. In addition to these minimum releases it was determined that a total delivery capacity <br />of 2 cfs would be beneficial for marketing augmentation water. The capacity to deliver 2 cfs <br />would allow Kehn to deliver half of their augmentation water storage to the river in one month. <br />The propo~~ed pump station has the capacity to deliver 2.1 cfs of flow when both pumps <br />are running. At this rate, running constantly for one month, the pump station can deliver <br />124.9 AF of water in one month. The maximum expected delivery for the augmentation plan is <br />28.2 AF in one month, which leaves 96.7 AF of capacity. The remaining pump capacity is <br />roughly half of the 194.3 AF of marketable augmentation water. Since, in most months, the <br />augmentation plan will require much less capacity than that shown above, the deliverable portion <br />of the available storage water will increase. Practically speaking, the pump station will be called <br />on to deliver some; mix of Kehn owned augmentation water and storage water owned by others. <br />The total amount deliverable by the proposed pump station is limited to 2.1 cfs. It is expected <br />that for Kehn's purposes, the lease of augmentation water and the operation of the augmentation <br />plan, the size of the pump station will be sufficient even in months of high demand. At other <br />times, the additio~lal capacity can be used for the release of storage water owned by others. <br />Should those who purchase storage volume in the ponds need greater capacity, they should pay <br />for the cost of additional permanent or portable pumps. In case additional pumping becomes <br />necessary, it is important to note that the proposed outlet ditch and Parshall Flume will handle up <br />to 8.9 cfs of flow. The plan calls for two pumps ~on the basis that in months where the only <br />releases from stor~>ge are limited to the augmentation plan only one pump will need to run, thus <br />saving wasted energy that would occur if a single larger pump were used. <br />T:IOPEMCodkcOJlcodkc0/ finnl reporl.doc 12 ANdERSON CONSULTING ENGINEERS, ANC. <br />