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. t I {~ e 00496 8 Strategic Scie/lce Implementation Plalls, as well as completing experimental flow and non-flow treatments outlined in the GCMRC's 2002 Experimental Plan. In essence, the FY 2006 work plan and budget provides a natural point for ending an earlier GCMRC phase of research and development activities related to certain resource areas, such as sediment, and allows for new knowledge about experimental results to be assessed in planning a more focused next phase. These activities provide an opportunity to direct the science activities of the program to areas where large uncertainties still exist and where experimental work is still required to reduce those uncertainties. This is an important step toward identifying future options for achieving management objectives. The GCMRC concurs with the various Technical Workgroup ad hocs in promoting the idea that FY 2006 provisional and planning approach is the most logical strategy to follow until FY 2007, when research and monitoring plans are developed and adopted for implementation under available funding. If one sees the last twenty years of science activities as consisting of four distinct (five-year) phases of the program, then the 2006 through 20 I 0 period represents the fifth phase of this environmental science and management effort. In this fifth phase, the GCMRC intends to promote studies that further reduce uncertainties associated with management of critical resources of concern. GEOGRAPHIC SCOPE The geographic scope of the Glen Canyon Dam Adaptive Management Program (GCD- AMP) is the Colorado River mainstem corridor and interacting resources in associated riparian and terrace zones, located primarily from the forebay of Glen Canyon Dam to the western boundary of Grand Canyon National Park (Figure 1.1). It includes the area where dam operations impact physical, biological, recreational, cultural, and other resources. The scope of Adaptive Management Program activities may include limited investigations into some tributaries (e.g., the Little Colorado and Paria Rivers). The lateral scope is an issue of ongoing research and investigation to determine where the effects of dam operations are located along the floodplain and where opportunities exist for mitigation of dam operations (e.g., sediment in the Paria River, or humpback chub breeding habitat in the Little Colorado River). The Adaptive Management Program may do research outside the geographic scope defined above to obtain needed information. Such linkages with other areas "should be made on a case-by-case basis, GCMRC FY2006 Annual Work Plan (Deaf) June to, 2005)