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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 />The control system at the tenni na1 end will be such that water can be <br />delivered to anyone of the tanks. Due to the elevation differences of each <br />tank there will be a different maximum flow that can be delivered to each. <br />The controls will be designed to operate both automatic~l1y and manually. In <br />nonna1 operation, the line will be fully opened when there is flow into any of <br />the tanks, and fully closed when adequate storage is obtained. <br /> <br />The remalmng components of Chapter 3 present the feasibility-level <br />engineering elements of the pipeline, including cost comparisons for the <br />various pipe types, alignments, and capacities. <br /> <br />3.3 Pipeline Sizing <br /> <br />One of the more critical components of the feasibility analysis is the <br />selection of the design flow and pipe size. The original analysis of the <br />Towaoc municipal supply system was conducted by the Bureau during the <br />feasibility studies for the Dolores Project. Based on those studies it \1aS <br />concluded that an annual supply of 1,000 af would be required to meet the <br />future municipal and industrial demands in the Towaoc area. The total annual <br />volume of 1,000 af thus became the basis for subsequent negotiations regarding <br />the Tribe's water supply and water rights. In this feasibility analysis the <br />1,000 af per year has been accepted as a finn design value. The selection of <br />a desi gn flow is primarily deoendent upon detenni ni ng a reasonab1 e temporal <br />distribution of the annual supply. <br /> <br />As previ ous1y noted, a unifonn flow over an enti re year wi thout interrupti on <br />woul d requi re a flow rate of 1.38 cfs. Wi thout si gni fi cant storage at the <br />tenni nal end, the pi pel i ne woul d be requi red to convey water for daily peaks <br />within the ye~r. <br /> <br />Wi th a moderate amount of storage at the tenni nal end of the 1 i ne, in the <br />range of 500,000 gallons, it is possible to base the design flow on a 10-day <br />peak. The Bureau used a 10-day peak computation and allowed for reductions <br />due to available storage to arrive at a preliminary design flow of 2.94 cfs in <br />the Dolores Project DPR. <br /> <br />3-4 <br /> <br />1060c <br />