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Chapter II Description of Alternatives 13 Management Program includes a Federal advisory committee (Glen Canyon Adaptive Management Work Group), a subcommittee (the Technical Work Group), the Interior's Grand Canyon Monitoring and Research Center (GCMRC), and independent review panels. kJ~I~ 1'(e,Jl _~r;? Y;/ The Glen Canyon Adaptive Management Work Group evaluates management objectives related to the effects of dam operations on resources within the Glen Canyon National Recreational Area and Grand Canyon National Park. They make recommendations to the Secretary of the Interior related to these issues. The Department of the Interior's GCMRC was established by the Secretary to develop and administer plans for long-term monitoring and research of the Colorado River and its riverine environment that responds to the short and long-term operations of Glen Canyon Dam. The GCMRC is guided by research needs identified by the Adaptive Management Work Group, the Technical Work Group, and other associated interest groups. The Glen Canyon EIS established an Adaptive Management Program to study and refine the operation of the dam. Temperature controls would be a new and potent variable available to manage the ecosystem of the river below the dam. The Adaptive Management Work Group, Technical Work Group, and the GCMRC would recommend (to the Secretary) testing and monitoring programs, review monitoring results, and recommend adaptive solutions to manage the system. Currently, the GCMRC is charged with implementing the monitoring priorities for all the resources impacted by the operation of Glen Canyon Dam. In accordance with the Grand Canyon Protection Act, these studies are funded by power revenues. The proposed addition of temperature controls does not change GCMRC's responsibility to monitor the resources nor does it change the list of resources in the canyon, but it should effect the priority of monitoring needs. For several years now, GCMRC's emphasis has been focused on monitoring sediment transport and beach habitat maintenance as the Adaptive Management Program explores the impacts of floods in the canyon. As this beach habitat work progresses over the next several years, the Adaptive Management Program may place emphasis on monitoring those resources that may be impacted by the use of this powerful new tool (temperature controls). In summary, the Glen Canyon Adaptive Management Program was developed to provide an organization and process for cooperative integration of dam operations, downstream resource protection and management, and monitoring and research information, as well as to improve the values for which the Glen Canyon National Recreation Area and Grand Canyon National Park were established. Proposed Operation - Two methods of operation (to achieve different goals) may be tested. The first (somewhat less ambitious goal and test) would be to prevent thermal shock to the young-of-the-year humpback chub as they leave the warm water of the Little Colorado River (mid to late summer) and enter the mainstream of the Colorado River which is presently very cold. Valdez and Carothers (1998) concluded, "We believe that most larval flannelmouth suckers, bluehead suckers, and humpback chub descending from warm natal tributaries into