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B. FEATURES COMMON TO ALL ACTION ALTERNATIVES All of the action alternatives provide for warmwater fishing opportunities in the following locations: 1) Waters with "grandfathered" Lake Management Plans': Mack Mesa Lake, McPhee Reservoir, Purdy Mesa Reservoir (formally Hallenbeck Reservoir), Rio Blanco Lake, Chipeta Lake, Crawford Reservoir, and Harvey Gap Reservoir. 2) Any waters above Flaming Gorge Dam can be stocked with channel catfish, mosquitofish, redside shiner, smallmouth bass. Habitats used by trout and the endangered fishes generally do not overlap in the Upper Colorado River Basin. Negative impacts by trout have not been specifically identified in the Upper Basin nor considered a problem by the Recovery Implementation Program (U.S. Fish and Wildlife Service 1987). If impacts become evident in the future this information may be used to modify the stocking procedures. Therefore, stocking of trout anywhere in the Upper Basin, except in occupied habitat, is permitted. This includes the stocking of trout directly into riverine habitats. Also common to all the alternatives is that the stocking of nonsalmonid (fish other than trout) species would be prohibited directly into occupied endangered fish habitat. Waters that are above the 50-year floodplain but have a direct connection to rivers in the Upper Colorado River Basin (e.g., Elkhead Reservoir, Highline Reservoir, and others) will be equipped or managed with an anti-escapement ' device or practice and have approved lake management plans acceptable to the Service and the State fish and wildlife agencies before the continued stocking of nonnative, warmwater fish species will be allowed. In alternatives 1-5, stocking not permitted on a routine basis or not prohibited outright would require a case-by-case review prior to permitting that stocking to occur. The case-by-case review process has been outlined in Appendix B. Additionally,~any proposal to introduce new fish species into the Upper Basin shall follow the rationale and justification of the American Fisheries Society policy statement "Introductions of Aquatic Species" (Appendix C; Items a-g on Page 52 of appendix). Proposals to stock in locations or situations not considered routine will be subject to case-by-case review and will include the following minimal information: A. The purpose and location of the proposed stocking. 6. The species, numbers, and rationale for selecting the species. C. The potential for escapement, the potential for survival in critical habitat if escapement occurs, and control measures that could be implemented to reduce the risk of escapement. ' Stocking limited to species approved within that management plan. 1 9