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. . , Over and above the 300 miles of lateral to be improved by the original USDA plan, an additional 40 miles of high seepage loss irrigation water delivery laterals were identified in the lateral study activity. The benefit cost analysis on these sites did not support the lining of these laterals by themselves. With the above information, an administrative decision was made to discontinue the lateral study at that time. Another concern of the Uintah project that was noted for possible revision was the fact that salt load reduction in the Whiterocks-East Uintah unit is being implemented at a level higher than the selected plan. This will result in an increased salt load reduction. That should be added to reflect true project benefits. Finally, this appeared to be a good time to update existing project cost and benefit to a January 1986 price and cost base and 8 5/8 percent discount rate. III. Uintah Basin Salinity Report Amendments. As a result of the above concern and opportunities, the Uintah Basin Salinity report is amended as follows: A. USDA Treatment of Off-farm Laterals in Support of On-farm Treatment Approximately 300 miles of off-farm lateral will be improved to provide support to the on-farm irrigation systems. At the time the Uintah Basin plan was prepared, no attempt was made to capture salt load reduction benefits of treating 300 miles of off-farm laterals; however, the cost of treating off-farm laterals was an integral part of on-farm treatment and was included in the cost of the USDA plan implementation. Due to interim agreements and policy, the USDA Uintah Basin Plan is amended to reflect salt load reduction benefits resulting from lining 300 miles of off-farm laterals. About 15,900 tons of additional salt load reduction benefit and 2500 acre feet of additional salvage water benefit will accrue to tne USDA plan as a result of treating off-farm laterals. Ou(63G -~