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present and future water policy, development and administration issues in a timely, <br />efficient and cost effective manner. <br />Alternative 3 is the "full-featured alternative" that provides water users, the CWCB and <br />DWR a DSS that collects data and develops tools for administration and planning at a <br />detailed, but expensive, level. Alternative 3 includes everything from Alternative 1 as <br />well as Alternative 2, plus additional data collection and components. The additional data <br />collection includes augmentation plans, substitute supply plans, transfer decree data, <br />installation of additional stream gages and additional monitoring wells. Alternative 3 <br />would produce an SPDSS that would meet nearly all of the expressed needs of the water <br />users as well as all of SB 96-74 recommendations applicable to the SPDSS. <br />RECOMMENDATIONS <br />The CWCB and DWR management team and the consultant team consider Alternative 2 to be <br />the most cost-effective alternative that: (1) satisfies the DSS needs as specified by the CWCB <br />and DWR to aid in addressing the current and future water resources issues before them, (2) <br />addresses the expressed needs of water users as determined during the needs assessment <br />interviews, (3) provides a level of data collection necessary to provide the information needed by <br />the DSS applications, and (4) is consistent with the DSS developments completed or under <br />development in other parts of the State. <br />In general, the data and components for each alternative are inter-dependent. Each alternative <br />identifies and anticipates the modeling and tool needs for the SPDSS so that a data collection <br />program can be developed and implemented during the first two years of SPDSS development. <br />The components identified for each alternative require that a certain level of data collection <br />activities be carried out to meet the needs of that alternative. If Alternative 1 were initially <br />selected and then a later decision were made to implement Alternative 2, additional data <br />collection tasks would be needed, with resultant increases in time and costs due to the loss of <br />economies of scale. This delay would potentially prohibit the CWCB and DWR from addressing <br />water resource issues in a timely and effective way. For example, Alternative 1 includes only the <br />expansion of the existing SB 96-74 Denver Basin MODFLOW model to include the overlying <br />alluvium. If Alternative 1 was initially selected and three years later it was decided that a <br />MODFLOW model for the Lower South Platte Alluvium region was required, three years of <br />needed data collection for this new effort would have been lost. It would then be necessary to <br />design a new data collection program at a higher cost and longer time frame than if Alternative 2 <br />had been selected initially, keeping the CWCB and DWR from making potential policy decisions <br />on using the best available data and tools. <br />Consequently, the consultant team and the State management team recommend Alternative 2 for <br />implementation. By providing the data and analysis tools outlined in Alternative 2, the SPDSS <br />will enhance the current CDSS and allow for more widespread participation and use through the <br />integration of more user-friendly state-of-the-science DSS technology. <br />p:Adata\gen\spdss\final report\executive summary.doc E'-3 <br />October 31, 2001 <br />