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<br />water management (non-structural alternative), onfarm ditch lining only, and <br /> <br />combining improved onfarm irrigation water management with ditch lining at <br /> <br />two levels of development. Lining of off-farm laterals is displayed as a <br /> <br />supplemental action to six of these alternatives. <br /> <br />Plan 8 is recommended for implementation. Improvement of off-farm <br /> <br />laterals not needed for proper operation of the onfarm improvements is not <br /> <br />included. Implementation of the recommended plan should be staged, begin- <br /> <br />ning with Stage One in Delta County where salinity reduction is the most <br /> <br />cost effective. The implementation period should be 10 years and program <br /> <br />effectiveness should be evaluated at five-year intervals to determine if the <br /> <br />program should be continued in other areas of the valley. <br /> <br />Implementation of Plan 8 in the Stage One area will reduce salt loading <br /> <br />in the Colorado River by 160,000 tons per year. The total installation cost <br /> <br />is estimated to be $119,100,000. It is recommended that the federal govern- <br /> <br />ment share the construction cost at a rate not greater than 75 percent. At <br /> <br />75 percent cost-share the cost to the federal government is $98,400,000 over <br /> <br />the 10-year implementation period, consisting of $62,125,000 for construc- <br /> <br />tion, $16,575,000 for technical assistance, and $19,700,000 to mitigate the <br /> <br />loss of habitat values. Annual levels of funding needed throughout the <br /> <br />implementation period are shown in Table VI-3. The total cost to the local <br /> <br />people is estimated to be $20,700,000 for construction and $775,000 per year <br /> <br />for operation, maintenance and replacement after the program is fully <br /> <br />implemented. <br /> <br />The Stage One area has been divided into four priority areas for cost <br /> <br />effective implementation. These are: <br /> <br />Priority <br />1 <br />2 <br />3 <br />4 <br /> <br />Area <br />Crawford Mesa <br />Tongue and Surface Creeks <br />Uncompahgre Valley <br />North Fork of the Gunnison <br /> <br />River ()G \,200 <br /> <br />1-5 <br />