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<br />~. <br /> <br />TASK NO.: 7 <br />RFP CROSS~REFERENCE: <br />Step 2,ltem (3) <br /> <br />STAFF MEMBERS RESPONSffiLE: <br />Hydraulics Specialist <br />Dam Evaluation Specialist <br />System Operation Studies Specialist <br /> <br />.. <br /> <br />. TASK TITLE: <br /> <br />Identification .of Modifications of the Existing Overland Ditch and Reservoir <br />.System Necessary to Accommodate Transbasin Diversions. <br /> <br />RATIONALE: <br /> <br />Enlargements and improvements of the existing Overland Ditch and/or <br />Reservoir required to accommodate the excess flows available for transbasin <br />diversion to the Surface Creek basin need to be 'determined by means of <br />integrated analyses of the hydraulic design of the ditch and the operation of <br />the reservoir. . <br /> <br />METHODOLOGY: <br /> <br />1. Prepare a large-scale location map 01 the existing Overland Ditch and <br />Reservoir system on a base prepared by photo-reproduction of 1 :24,000 scale <br />USGS topographic sheets. <br /> <br />2. Ident.ify the physical characteristics of the di~ch and reservoir and confirm <br />their condition, capacities and other characteristics by field inspection. <br /> <br />3. Perform' a hydraulic analysis of the existing ditch system to determine the <br />size of ditch necessary to carry the system demands plus the excess flows <br />identified in Task No~ 6 available for diversion to the-Surface Creek basin. <br /> <br />4. Using an available reservoir operation computer program, operate the Over- <br />land Reservoir model to determine the live capacity' required to regulate the <br />optimum system supplies plus the estimated excess supplies available for <br />trans basin diversion. <br /> <br />PRODUCTS: <br /> <br />1. Location map of existing Overland Ditch and Reservoir syste'm. <br /> <br />2. Tabulation of present actual operating capacities of components of existi"ng <br />, system. <br /> <br />3. List of enlargements and improvements of components of the existing 'system <br />required to accommodate the estimated excess supplies available for trans- <br />basin diversion. <br /> <br />11-16 <br /> <br />i\ <br /> <br />/ <br /> <br />/ <br />:,,/ <br /> <br />\ <br /> <br />/ <br />