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<br />DOWNLlSTING <br /> <br />HUMPBACK CHUB (Upper Basin and Lower Basin Recovery Units) <br /> <br />DELlSTING <br /> <br />DEMOGRAPHIC CRITERIA (*self-sustaining with natural recruitment) <br /> <br />Over a 5"year monitoring period: <br />Maintain the six populations ("no net loss"*) <br />One core population in upper basin> 2,100 adults* <br />One core population in lower basin > 2, I 00 adults* <br /> <br />RECOVERY FACTOR CRITERIA <br /> <br />Upper Basin Recovery Unit <br /> <br /> <br />I. Beneficial flow regimes identified, implemented, evaluated, and revised <br />2. Overutilization reevaluated and, if necessary, actions. identified to ensure <br />adequate protection <br />3. Effects of diseases and parasites reevaluated and, if necessary, actions <br />identified to ensure adequate protection <br />4. Nonnative.fish stocking procedures developed, implemented, evaluated, <br />and revised <br />5. Channel catfish control programs developed and implemented to identify <br />necessary control levels <br />6. Mechanisms determined for legal protection of habitat <br />7. Elements of conservation plans identified . <br />8. Hazardous-materials spills emergency-response plans reviewed and <br />modified as necessary <br />9. Measures identified to minimize risk of hazardous-materials spills in Black <br />Rocks and Westwater Canyon from transport of materials along adjacent <br />railway <br />10. Locations of petroleum pipelines in I DO-year floodplain of critical habitat <br />identified and need for emergency shut-off valves assessed <br /> <br />Lower Basin Recovery Unit <br /> <br />L Life stages and habitats in mainstem identified and relationships between <br />mainstem and Little Colorado River (LCR) determined <br />2. Beneficial operations of Glen Canyon Dam and flow regimes in LCR <br />identified, implemented, evaluated, and revised . <br />3. Effects and feasibility of TeD for Glen Canyon Dam determined <br />4. Overutilization reevaluated and, if necessary, actions identified to ensure <br />adequate protection <br />5. Asian tapeworm control program developed and implemented inLCR to <br />identify necessary control levels <br />6. Nonnative fish stocking procedures developed, implemented, evaluated, <br />and revised for mainstem and tributaries in Grand Canyon <br />7. Rainbow trout, channel catfish, black bullhead, and common carp control <br />programs developed and implemented to identify necessary control levels <br />inLCR <br />8. Brown trout and rainbow trout control programs developed and <br />implemented to identify necessary control levels in mainstem in Grand <br />Canyon <br />9. Mechanisms determined for legal protection of habitat in mainstem and <br />LCR <br />10. Elements of conservation plans identified <br />I I. Hazardous-materials spills emergency-response plans reviewed and <br />mod iti ed as necessary <br />12. Measures identified to minimize risk of hazardous-materials spills from <br />transport of materials along U.S, Highway 89 and near the two Cameron <br />bridges spanning the LCR <br /> <br /> <br /> <br />DEMOGRAPHIC CRITERIA (*self-sustaining with natural recruitment) <br /> <br />For 3 years beyond downlisting: <br />Maintain the six populations ("no net loss"*) <br />Two core population in upper basin; each> 2,100 adults* <br />One core population in lower basin :> 2, I 00 adults* <br /> <br />REcovERY FACTOR CRITERIA <br /> <br />Upper Basin Recovery Unit <br /> <br />I. Necessary flow regimes provided <br />2. Adequate protection fromoverutilization attained <br />3. Adequate protection from diseases and parasites attained <br />4. Nonnative fish stocking procedures finalized and implemented <br />5. Identified levels of channel catfish control attained <br />6. Necessary hllbitat legally protected in perpetuity <br />7. Conservation plans developed and implemented, and necessary agreements <br />executed <br />8. Flow regimes provided that reflect inter-annual variability in hydrologic <br />conditions to maintain natural proportions of Gila species and intergrades <br />9. Emergency-response plans for hazardous-materials spills implemented <br />10. Measuresfinalized and implemented to minimize risk of hazardous- <br />materials spills in Black Rocks and Westwater Canyon from transport of <br />materials along adjacent railway <br />II: Emergency shut-off values installed on problematic petroleum pipelines <br /> <br />Lower Basin Recovery Unit <br /> <br />I. Appropriate habitats i.n mainstem provided <br />2. Necessary flow regimes provided in mainstem and LCR <br />3. .TCD for Glen Canyon Dam implemented, if determined feasible and <br />necessary <br />4, Adequate protection from overutilization attained <br />5. Identified levels of Asian tapeworm control in LCR attained <br />6. Nonnative fish stocking procedures .finalized and implemented <br />7. Identified levels of rainbow trout, channel catfish, black bullhead, and <br />common carp control attained in LCR <br />8. Identified levels of brown trout and rainbow trout control attained in <br />mainstem in Grand Canyon <br />9. Necessary habitat legally protected in perpetuity <br />10. Conservation plans developed and implemented, and necessary agreements <br />executed <br />11, Emergency-response plans for hazardo.us.materials spills implemented <br />12. Measures finalized and implemented to minimize risk of hazardous- <br />materials spills from transport of materials along U.S. Highway 89 and <br />near the two Cameron bridges spanning the LCR <br /> <br /> <br />