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<br />1("0'-, ' <br />~",I.l <br /> <br />:> <br /> <br />I' <br /> <br />", <br /> <br />found by Conklin i,s represented in run Number 4, where both surface <br /> <br />and ground water are availabel ae IAF/acre each. Supplemental ,water <br /> <br />beyond ehe total of 2.0 AF/acre would add to net income only $2.73/AF <br /> <br />or less. <br /> <br />6. Implications <br /> <br />It is clear that the crucial issue in evaluating the Narrow's <br /> <br />direct irrigation benefies rests on establishing the extent to which <br /> <br />r~~ Number I is representative or runs such as Number 4 reflect the <br /> <br /> <br />actual water supply situation. Conklin's findings suggest that Run 4c <br /> <br />is representative of the area overlying the Valley fill aquifer. Jeris <br /> <br />Danielson's letter of February 17 support this, indicating that con- <br /> <br />siderable ground water capacity has been added since the Bureau's water <br /> <br />study was performed. There are lands under the North Sterling ditch <br /> <br />withoue ground water or adequate surface water, and the extent of these <br /> <br />and any others with similar situations should be established. <br /> <br />Finally, the extent to which water markets are satisfyi~g needs <br /> <br />for supplemental water in areas where ground water is not available <br /> <br />needs to be established.' <br /> <br />REFERENCES <br /> <br />1. U, S. !Vater Resources Council "Princip les and Standards for Planning liater <br />and Related Land Resources", Federal Register, September 1973. <br /> <br />2. HOII'e, C. Ii. Benefit-Cost Analysis for Water System Planning, American Geo- <br />physical Union, 1971. <br /> <br />3. Young, R. A. and S. L. Gray. The Economic Value of !Vater, Technical Report <br />, to National Water COllUUission, National Technical Information Service, <br />1972 (325 pp.). <br /> <br />4. Conklin, Lawrence. "Farm and Irrigation liater Management in LOl>'er South <br />Platte Valley, Colorado", M.S. thesis, Colorado State University; Dept. <br />of Economics, 1974. <br />