Table 4. — Vertical dislribulion of I-group steelhead trout 

 fingerlings in turbine intakes of The Dalles Dam. Com- 

 bined results of 14 tests extending from 3:30 p.m. to 

 8:30 a.m. 



' From ceiling; of intake at gateweli. 



T.\Br.E 5. — Vertical distribution of I-group sockeye .salmon 

 fingerlings in turbine intakes of The Dalles Dam. Com- 

 bined results of 1 4 tests extending from 3:30 p.m. to 

 8:30 a.m. 



[Test period, April 28 to May 12, 1960] 



' From ceiling of intake at gateweli. 



Table 6. — Vertical distribution of lamprey ammocoetes in 

 turbine intakes of The Dalles Dam. Combined results of 

 14 tests extending from 3:30 p.m. to 8:30 a.m. 



[Test period, April 28 to May 12, 1960] 



T.VBLE 7. — Vertical dwitribuiion of fingerling salmonids in 

 turbine intakes of The Dalles Dam. Combined results of 

 14 tests extending from 3:30 p.m. to 8:30 a.m. 



(Test period, April 28 to May 12, 1960] 



' From ceiling of intake at gateweli. 



Table 8. — Vertical distribution of fingerling salmonids in 

 turbine intake 12-C at McNary Dam. Combined results 

 of 10 tests extending from 7 p.m. to 5 a.m. 



(Test period, April 24 to May 26, 1961] 



I From ceiling of intake at gateweli, 

 liOG 



> From ceiling of intake at gateweli. 



Catches at The Dalles Dam showed : 



1. Vertical distribution of salmonids did not 

 varj- among areas of the powerhouse sampled; 

 therefore, the catch data for all intakes were com- 

 bined for subsequent analysis. 



2. The combined catches of all salmonid species 

 and age groups showed that most were caught in 

 tlie top two of tlie sis nets. 



3. Tlie I-group chinook salmon and I-group 

 steelhead trout were most strongly concentrated 

 in the top two nets — 73 and 74 percent, 

 respectively. 



4. The O-group cliiiiook salmon and I-group 

 sockeye salmon were less strongly concentrated in 

 the top two nets — 48 and 58 percent, respectively. 



5. The vertical distribution of ammocoetes was 

 the reverse of that of salmonids; very few were 

 cauglit in the top two of the six nets. This distri- 

 bution held for all areas of the powerhouse. The 

 zone of highest concentration at the upstream end 



U.S. FISH AND WILDLIFE SERVICE 



