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4 

 minimal level to avoid jeopardy, since the loss of even one adult 

 is a cause of serious concern. 



For Snake River spring/summer chinook salmon and Snake River fall 

 Chinook salmon, there are two criteria, base period analysis and 

 combined efffects analysis, both of which must be met. For the 

 base period analysis, there must be substantially lower mortality 

 of listed species in 1993 than the level of mortality caused by 

 an action during a 1986-1990 base period. The 1986-1990 base 

 period reflects the most recent series of years prior to 

 consideration of these species for listing. Second, the combined 

 effects analysis considers the action being reviewed along with 

 effects of all other actions, and has to result in reasonable 

 certainty that populations of Snake River chinook salmon would at 

 least stabilize at 1986-1990 levels within four generations. 

 These are interim objectives that will be modified in future 

 consultations depending in part on the recovery plan now under 

 development. 



As of July 28, 1993, NMFS has completed 132 consultations in all 

 the action categories: hydropower, harvest, habitat, and 

 hatcheries. This includes informal consultations, where NMFS 

 agrees that a proposed action, sometimes as modified during 

 consultation, is not likely to adversely affect any of the listed 

 salmon. Many of these consultations were conducted by grouping 

 similar actions and consulting with multiple agencies 



