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I CJ I f'- f'o. N I (~, (...,~ I I I I I I I I I I I I I I I I evaluation shows a layered sequence of unconsolidated sedimentary deposits with extensive faulting within and surrounding the Valley'arising from several sets of forces acting over different periods of geologic time. The complexity of the geologic structure has led the study team to the conclusion that any ground water flow modeling of the Valley would depend on estimates of physical parameters that are highly subjective, and that appear to be highly variable in different parts of the Valley. Thus, any Valley-wide modeling results with existing data would almost certainly be subject to significant changes as more data becomes available in the future. In summary, the study team concludes from the Phase I studies that it is not economically feasible to develop water for irrigation from the deep (below 3000 feet) confined aquifer due to relatively low transmissivity and unacceptably poor water quality for the intended uses. For the shallow confined aquifer between approximately 1000 and 2500 feet, it is concluded that development of supplemental water for irrigation would not be economically feasible at this time. For the confined aquifer, no definite conclusions can be reached from the Phase I studies regarding the institutional issues of tributariness of the confined aquifer system in the Valley and the potential for injury to existing water rights which may result from development of those aquifers. The recommendations presented below follow from the study team's Phase I studies of the deep confined aquifer of the Valley, and are based on the conclusions presented in the preceding part of this summary. These recommendations also recognize that the primary function of the Authority is to finance economically-feasible water-development projects. RECOMMENDATIONS The first r.e~tlr:tga,ti~D~!lL!1!!LfMs.e-U.j;Y91!:.s...~i.s that the Phase II _ ' _'_'.,_.J~'_~___",,__, 'm _ . ,i.~.~~.i-tLgs'l.iQn_.as---'trigi na.l.1 yem:isio.ned,.~in-"'QIVitl.Q.JJ1:ill.iJlg,}I.Q5!...!~~n~i.,o!~.e,~p:: ml~....s.b.aJJJJL.nQ.Lb.e.j,nJt:i4j;~JL!Ltl1is, tjm~. This recommendation is based on the conclusion that it is not presently economically feasible to implement a $-6