TABLE 4. Percent N, Saturation of Water Samples Taken Between Bonneville Dam and 



Prescott, Oregon; the Survey was Done on April 9-10, 1974. The average water flow past 



Bonneville Dam during this period was 8.1 KC MS (286 KCFS). 



River Location Time of 



Sample site mile in river sample Temp. 



fnTF 



N 2 



April 9 



Bonneville 



Forebay 



Bonneville 

 Power House 



Bonneville 

 Spillway 



Tanner Creek 



Dodson 



Rooster Rock 



Troutdale 

 Vancouver 



146.0 



145.0 



Center 



Center 



07:35 



08:10 



8.0 



7.8 



17.9 114.9 



17.95 



18.4 



18.4 

 18.4 

 18.4 



114.7 



118.5 



118.2 

 118.5 

 118.2 



Mixing and Equilibration Between The 

 Dalles and Astoria — June 1974 



This sampling effort was begun on June 11 at 

 The Dalles (RM 192) and completed on June 14 at 

 Astoria, Oregon (RM 14). No significant equilibra- 

 tion occurred in the 46-mile reservoir between 

 The Dalles and Bonneville Dams (Table 5). Spill- 

 way discharge at The Dalles was held constant at 

 6.8 KCMS (239 KCFS) for a 7 hr period prior 

 to the start of the survey; total outflow during this 



period was 10.07 KCMS (379 KCFS). The average 

 total flow at The Dalles on June 10-11 was 10.1 

 KCMS (386 KCFS) while the average spill was 

 4.8 KCMS (170 KCFS). In reference to nitrogen level 

 the flow seems to be mixed (side-to-side) immedi- 

 ately below the dam and remains so to the Bonne- 

 ville forebay. 



After a 22-hr time lapse the survey was con- 

 tinued from Bonneville to Astoria on June 12. 

 The Bonneville forebay and power house samples 



Research at Prescott 17 



