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w Ut N W - " " Adequate data are available for nine Reclamation, one BLM, and eight USDA projects, which are included in the present analys;s. All the project data is displayed in the Appendix (TableiC-2). Several of these projects were given fixed construction-start dates. A summ~ry of projects and investment levels analyzed in the model is ,shown in Table 3. The table indicates which pro- jects .re included in the various investment or funding assumptions ranging from $301 million to $703 million. The "fixed'start" projects shown under each investment level indicate ,those projects which are "fixed" in terms of curren~ program commitments/constraints for construction or implem~ntation. The remaining projects in the table are flagge4 to indicate new construction starts and whether the new st~rts under each investment level are delayed or acce- lerate~ compared to the $570 million level. ;\! ,) :; ','j i ,'J ,j 'J! -,-~ , 1 "l ;1 ~ , ,"I- ii!:.' '1; .;,t ;:~ t :; :t , 'I , t \, ;-:i :~ :J: j 'oj , , '~ The salt load reductions, above those obtained to date, are compar~d against the target reduction at two investment levelsiand are shown in Figure 10. In fig*re 10, the salt load reductions (not including completed units) at two investment levels are compared against the target reductions needed for the entire period (1985-~020). Not only does the selected program investment level have to meet the long-term reduction goal in 2010, but also t~ provide assurance of remaining above the target reduct~on requirements for the interim period. The target reductions for the entire period of analysis are based on averag~ hydrology for the basin which means that the numeric criteria will be met 50 percent of the time. In the short term (l9aS-199S), program reduction exceeds the minimum target'requirement. However, any construction delays could reduce1the probability of meeting short-term reduction requir$ments as well as the ultimate salt load reduction in 2010. 'Of particular note is the increase in program invest~ ment estimated in 1990. Any significant construction delay at this critical development point (Paradox Valley Unit) will make it difficult to meet the 1995 target level. Risk and Uncertainty in Implementation Salinity control is often viewed as both an enviromental- pOllution control and water resources related program. In either'case, it is considered a unique undertaking, involving advanced computer modeling and other recently develo~ed ground water control technolgies. Aside from the basic technical risks involved, the basin wide program must "'1 ,I I ,:1 51 , , , , J .A .J 1 ~ -i 3' -~