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4 regularly initially but then less frequently in subsequent years. The RIPSWG has begun more frequent meetings and this Summer is scheduled to submit a draft management plan for the Lower Colorado River Basin to the USFWS Regional Director for the Southwest Region. A Comprehensive Action Plan for humpback chub in Grand Canyon could be wholly incorporated into the management plan that the RIPSWG is at this time developing. Lower Colorado River Mnlti-Species Conservation Program (LCR-MSCP): The LCR-MSCP was established in response to environmental compliance needs of water and power entities in Arizona, California and Nevada. The LCR-MSCP is working toward the recovery oflisted species, including the razorback sucker, bony tail, and humpback chub, while accommodating current water diversions and power production. In return LCR-MSCP stakeholders are seeking incidental take authorization under the ESA from the USFWS to allow for implementation of covered activities and conservation measures over the next 50 years. The LCR-MSCP planning area encompasses the Colorado River from the Lake Mead full pool elevation of 1229 feet to the Southerly International Boundary with Mexico. At this elevation, the inflow area of the Colorado River is influenced by the reservoir as far upstream as Separation Rapids (River Mile [RM] 239.5). This rapids is about 37 river miles upstream of Grand Wash Cliffs [RM 276.5], the western boundary of the GCDAMP, thus there is a geographic overlap between the two programs. LCR-MSCP has tentatively identified the need to support the AMWG program for humpback chub as follows: "Provide $IO,OOO/year for 50 years (total: $500,000) to the Glen Canyon Dam Adaptive Management Workgroup to support implementation of planned, but unfunded, species conservation measures and, as appropriate, to fund species conservation measures in the lower canyon of the Colorado River upstream of Lake Mead." 3.0 THREATS TO HUMPBACK CHUB Threats to humpback chub in Grand Canyon identified by the Ad Hoc Committee, correspond to threats identified in the Humpback Chub Recovery Goals (U.S. Fish and Wildlife Service 2002). Past and/or current threats to the humpback chub in Grand Canyon listed by recovery factor are as follows: Recovery Factor A.- Adequate Habitat and Range for Recovered Populations Provided I. Habitat affected by streamflow regulation . extreme daily flow fluctuations destabilize habitat, especially for young fish 2. Flows necessary for all life stages . high summer/fall base flows inundate juvenile rearing habitat 3. Cold water temperature . cold hypolimnetic releases inhibit egg hatching and larval survival . cause thermal shock of fish <50 mm TL descending from seasonally warmed tributaries