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DOWNLISTING HUMPBACK CHUB (Upper Basin and Lower Basin Recovery Units) DELI STING DEMOGRAPHIC CRITERIA ("self-sustaining with natural recruitment) Over a 5-year monitoring period: . Maintain the six populations ("no net loss"") . One core population in upper basin> 2, I 00 a<;lults" . One core population in lower basin > 2,100 adults" RECOVERY FACTOR CRITERIA Upper Basin Recovery Unit 1. Beneficial flow regimes identified, implemented, evaluated, and revised 2. Overutilization reevaluated and, if necessary, actions identified to ensure adequate protection 3. Effects of diseases and parasites reevaluated and, if necessary, actions identified to ensure adequate protection 4. Nonnative fish stocking procedures developed, implemented, evaluated, and revised 5. Channel catfish control programs developed and implemented to identify necessary control levels 6. Mechanisms determined for legal protection of habitat 7: Elements of conservation plans identified 8. Hazardous-materials spills emergency-response plans reviewed and modified as necessary 9. Measures identified to minimize risk of hazardous-materials spills in Black Rocks and Westwater Canyon from transport of materials along adjacent railway . 10. Locations of petroleum pipelines in 100-year floodplain of critical habitat identified and need for emergency shut-offvalves.assessed Lower Basin Recovery Unit Life stages and habitats in mainstem identified and relationships between mainstem and Litlle Colorado River (LCR) determined 2. Beneficial operations.of Glen Canyon Dam and flow regimes in LCR identified, implemented, evaluated, and revised 3. . Effects and feasibility ofTCD for Glen Canyon Dam determined 4. Overutilization reevaluated and, if necessary, actions identified to ensure adequate protection . 5. Asian tapeworm control program developed and implemented in LCR to identify necessary control levels 6. Nonnative fish stocking procedures developed, implemented, evaluated, and revised for mainstem and tributaries in Grand Canyon Rainbow trout,channel catfish, black bullhead, and common cal1l control programs developed and implemented to identify necessary control levels '. inLCR .. Brown trout and rainbow trout control programs developed and implemented to identify necessary control levels in mainstem in Gran.d Canyon Mechanisms determined for legal protection of habitat in mainstem and LCR 10. Elements of conservation plans identified I I. Hazardous-materials spills emergency-response plans reviewed and modified as necessary 12. Measures identified to minimize risk of hazardous-materials spills from transport of materials along U.S. Highway 89 and near the two Cameron bridges spanning the LCR 1. 7. 8. 9. DEMOGRAPHIC CRITERIA ("self-sustaining with natural recruitment) For 3 years beyond downlisting: . Maintain the six populations ("no net loss"") . Two core population in upper basin; each> 2,100 adults" . One core population in lower basin > 2, I 00 adults" RECOVERY FACTOR CRITERIA Upper Basin Recovery Unit I. Necessary flow regimes provided 2. Adequate protection from overutilization attained 3. Adequate protection from diseases and parasites attained 4. Nonnative fish stocking procedures finalized and implemented 5. Identified levels of channel catfish control attained 6. Necessary habitat legally protected in perpetuity 7. Conservation plans developed and implemented, and necessary agreements executed 8. Flow regimes provided that reflect inter-annual variability in hydrologic conditions to maintain natural proportions of Gila species and intergrades 9. Emergency-response plans for hazardous-materials spills implemented 10. Measures finalized and implemented to minimize risk of hazardous- materials spills in Black ROcks and Westwater Canyon from transport of materials along adjacent railway II. Emergency shut-off values installed on problematic petroleum pipelines Lower Basin Recovery Unit I. Appropriate habitats in mainstem provided 2. Necessary flow regimes provided in mainstem and LCR 3. TCD for Glen Canyon Dam implemented, if determined feasible and necessary 4. Adequate protection. from overutilization attained 5. Identified levels of Asian tapeworm control in LCR attained . 6. Nonnative fish stocking procedures finalized and implemented 7. Identified levels of rainbow trout, channel catfish, black bullhead, and common cal1l control attained in LCR Identified levels of brown trout and rainbow trout control attained in mainstem in Grand Canyon Necessary habitat legally protected in perpetuity Conservation plans developed and implemented, and necessary agreements executed Emergency-response plans for hazardous-materials spills implemented Measures finalized and implemented to minimize risk of hazardous- materials spills from transport of materials along U.S. Highway 89 and near the two Cameron bridges spanning the LCR 8. 9. 10. I], . 12.