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<br />l- <br />e...:> <br />f';' <br />en <br /> <br />Findings <br /> <br />The recommended plan is expected to <br />satisfy salt load reduction objectives and <br />program goals by maintaining average TDS <br />at Imperial Dam, below Parker Dam, and <br />below Hoover Dam at or below 879, 747, and <br />723 mg/L, respectively, using a mean water <br />supply of 15,000,000 acre-feet per year <br />(average of 15 hydrologic traces). The <br />recommended plan's implementation <br />schedule is shown on table 1 and figure 4, <br /> <br />The analysis was based on January 1988 <br />data, An annual review is required to check <br />progress against program objectives and to <br />review and evaluate any newly developed <br />data. As evidenced by past program <br />activities, long lead times are required for <br />project planning and implementation, and <br />construction costs will continue to increase. <br />To minimize program costs and to avoid <br />increased inflation expenses, program <br />planning, implementation schedules, and <br />funding levels should be consistent with the <br />recommended plan. Although high flows <br />had temporarily lowered salinity levels in <br />the system, construction should not be <br />delayed. Salinity levels are currently rising, <br />as evidenced by figure 5, and any delay <br />would affect program continuity and <br />increase overall program costs. <br /> <br />. The recommended plan will satisfy the <br />remaining salt load reduction objective of <br />removing slightly over 1 million tons per <br />year by 2010 and the program goal of <br />maintaining average TDS at or below <br />879 mg/L at Imperial Dam based on <br />long-term mean water supply. <br /> <br />. Implementation of the recommended plan <br />is predicated on receiving adequate annual <br />funding. <br /> <br />. In order to meet the program objectives and <br />goals beyond the next decade and to <br />maintain program continuity, construction <br /> <br />of several new units needs to be initiated in <br />the next few years, <br /> <br />. <br /> <br />To meet the program salt load reduction <br />objectives, it is necessary to have a mix of <br />both USDA and Interior projects. <br /> <br />. <br /> <br />Repayment analysis of the Lower Colorado <br />River Basin Fund prepared for the 1988 <br />Evaluation Plan showed that sufficient <br />funds are available to cover all costs <br />(capital,O&M, interest, and inflation) of the <br />recommended plan. There have been no <br />changes during 1989 which would alter the <br />repayment analysis. <br /> <br />. <br /> <br />Continued close Federal and State <br />coordination among Interior, USDA, the <br />Interagency Salinity Control Coordinating <br />Committee, the Forum, and the Colorado <br />River Basin Salinity Control Advisory <br />Council (Advisory Council) is critical for <br />effective management of the program, <br /> <br />. <br /> <br />To keep the project implementation <br />schedule on track and to allow for inclusion <br />of newly formulated, more cost-effective <br />units and changes in technology, this <br />evaluation will be updated annually, <br /> <br />Recommendations <br /> <br />. <br /> <br />The Basin States are actively supporting <br />implementation. Under the USDA <br />program, the States have devoted <br />considerable time to assisting with <br />resolution of a variety of issues, Within <br />each of the USDA projects, State agencies <br />are participating in program imple- <br />mentation. In Nevada, the State has <br />appropriated matching funds for installing <br />phase I of the Moapa Valley salinity control <br />program. <br /> <br />. <br /> <br />001 and USDA should support the <br />investment level required for the current <br />implementation plan for program planning <br />and budgeting. <br /> <br />2 <br />