150 



■ Snak* RIvar Spill 



CRiSP predictions and cage studies 



For the period June 9 to 13, 1995, the observed mortality in the cages 

 downstream of Ice Harbor Dam were 88% in the to 1 meter cage and 

 57% in the to 4 meter cage. CRiSP-predicted mortalities were 94% for 

 the to 1 meter cage and 41% for the to 4 meter cage. 



Cage study to assess mortality 



CRiSP mortality 41% 

 Observed mortality 57% 



CRiSP predicts higher in-river survival with no Snake River spill. 



Z Cage study' 



O 



SQ 



^.->^ 



- ^-^ 



130% TDG 

 108% TDG 



35% survival with no spill in Snake River 



34% survival with current gas levels and fish depth 30 ft. 



31% survival with current gas levels and fish depth 10 ft/ 



TDG = total dissolved gas under 1995 spring spill program 



James Anderson 



Unlverwly of Washington 



June 22. 1995 



