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<br />TASK NO.: 2 <br />RFP CROSS-REFERENCE: <br />Step I, Item (I) <br /> <br />STAFF MEMBERS RESPONSIBLE; <br />Hydrologist <br />Water Rights Specialist <br />System Operation Studies Specialist <br />Irrigation Specialist <br /> <br />TASK TITLE: <br /> <br />Evaluation of Operation of Existing Surface Creek Water Supply System. <br /> <br />RATIONALE: <br /> <br />An accurate and detailed assessment of the water rights and systems <br />presently operating, in the Surface Creek basin and their past operating <br />history must be based on a comprehensive compilation of applicable water <br />rights, stream flows, water use, Jand_~.~Lg_l?J?P!~gLl!.!:.!g~tio.!!. re!lYke.m_eols__ <br />and practices. and other applicable data. To obtain, comparative evaluations <br />of the operation of the Surface Creek Water Supply System, a computer <br />simulation model of the system is required for both historic and potential . <br />improved management conditions. <br /> <br />METHODOLOGY <br /> <br />1. Prepare' a base map of the Surface Creek basin by photo-reproduction of <br />1 :24,.000 scale USGS topographic sheets. <br /> <br /> <br />2. Locate ditches, reservoir.s, and other water rights, gaging stations and other <br />applicable features on the ba'se map to produce a planimetric representation <br />of the water supply syst.em in the Surface Creek basin. <br /> <br />3. Obtain water rights data from the State Engineer's Water Data Bank and the <br />District 40 Water, Commissioner. <br /> <br />4. Determine the present entitlements of the water rights and identify with the <br />existing d~tches and other water features located on the base map. <br /> <br />5. Determine the extent of presently irrigated acreages, types of crops~ <br />application methods, and other irrigation characteristics. <br /> <br /> <br />6. Compile the historic monthly stream flows recorded at existing gaging sta-. <br />tions in .the basin for the WY 1969 'through 'WY 1984 study period and <br />disaggregate into the con tributary flows for the various tributaries ,of the <br />stream system. <br /> <br />7. Compile the historic' monthly diversions by the existing water rights in the <br />system for the WY 1969 through WY 1984 study period from the State <br />Engineer's records. <br /> <br />1l-8 <br /> <br />, <br />i <br /> <br />/ <br />