40 



20 



100 - 



< 

 cc 



Z) 



I- 

 < 



o 



Q: 80 



UJ 



60 



40 



20 



p^ 



Ld 



\Z 



\2m 



VA BEFORE SPILL TEST 



[23 DURING SPILL TEST 



f: 



Z 



g 



^ 



^ /I. ' . ' . ' 



y... 



yyyr 



^ >* • • • 



FOREBAY 

 ABOVE 

 SPILLWAY 



TAILWATER 



BELOW 

 SPILLWAY 



FOREBAY 

 ABOVE 

 TURBINES 



TAILWATER 



BELOW 

 TURBINES 



Figure 2. — Percentage saturation of dissolved nitrogen in 32 samples taken near Bonneville Dam before and 



during spill tests, March 3-11, 1966. 



SUPERSATURATION OF NITROGEN IN COLUMBIA RIVER 



