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ODu777 · Alternative Sb: Shoshone Power Plant. 5. Other Alternatives . Alternative 6a: Insurance Pool. \ \ The methodology used in the analyses, together with the results and conclusions from this investigation, are summarized in this report. Detailed analysis methodology, results and conclusions are presented in a series of twelve Technical Memoranda that are included in Appendices A through L. Executive Committee comments regarding the draft Phase 2 Report study findings are included in Appendix M. 1.2 GENERAL Providing 20,000 acre-feet of supplemental water is an identified element of the Final Programmatic Biological Opinion (PBO) (U.S. Fish and Wildlife Service, December 20, 1999). The PBO specifies actions designed to offset the impacts of all water depletions that have historically occurred, and a specified level of depletions (up to 120,000 acre-feet) that will occur in the future, upstream fr~m the lower terminus of the 1S-Mile Reach. Persons or entities with projects upstream from the 1S-Mile Reach requiring a federal permit or federal action that would invoke the jurisdiction of the U. S. Fish and Wildlife Service (Service) under ~7 of the Endangered Species Act (a "federal nexus''), may rely on actions identified in the PBO as a Reasonable and Prudent Alternative (RP A) to avoid jeopardy to, or adverse modification of critical habitat for, the four Colorado River fish species listed under the Act. The PBO identifies the 1S-Mile Reach as important for the survival and recovery of the listed species. The PBO also identifies providing adequate flows in the 1S-Mile Reach, in combination with other recovery actions, as important to achieving recovery of the listed species. In particular, with regard to this report, the Service has identified enhancement of spring peak flows in the 1S-Mile Reach as assisting in habitat formation and maintenance. The Service identified target peak flows in the 1S-Mile Reach of 12,900 to 26,600 cfs as important to mobilize gravel/cobble substrate. Management activities to enhance spring peak flows are expected to result in an increased frequency of years in which flows exceed 12,900 cfs. The Service has also identified enhancement of flows in the late irrigation season Ouly through October) as important because flows in the 1S-Mile Reach are significantly reduced by agricultural operations in the Grand Valley. One of the management elements identified in the PBO is the subject of this report. The PBO states: 11\ 'The intent is to provide additional water up to approximatelY 20}000 acre-feet per year of water for spring peak flow enhancement} without diminishing project yield or causing project sponsors to incur significant costs. When additional water of approximatelY 20}000 acre-feet is available} it will provide 1)009 ifs perdqyfora 10 dqy period. n (U.S. Fish and Wildlife Service, 1999, p. 1~) In preparing this report, the consultant team has worked closely with, and incorporated input from, an Executive Committee representing a broad set of interests participating in the Upper Colorado River Basin Recovery Program (Recovery Program). The Executive Committee consists of the following: (1) one representative from the Colorado Water Conservation Board (CWCB) who serves as the Executive Committee's primary point of contact with the consultant team and who chairs the P: \Data \ GEN\CWCB\ 19665\Report Phase 2\FinalReport9.03\Final_CFOPS_Report(9-03).doc 11