Comparisons of the temperature and dye plumes When compared to two-unit predictions, however, 



and the infrared survey indicated that the shape it was clear that the distance to the 1.5°F (0.83°C) 



and extent of the temperature and dye plumes for isotherm exceeded predictions for the max ebb 



some tidal phases were in general agreement with tide stage. 

 each other (NUSCO 1979) (Tables 2 and 3). 



TABLE 2. Comparison of predicted and actual surface areas encompased by selected AT isotherms pro- 

 duced during two-unit operation. 



Area in acres encompassed by each isotherm 



Tide stage 8.0°F (4.4°C) 6.0°F (3.3°C) 4.0°F (2.2°C) 1.5°F (0.8°C) 



Max Flood 



TABLE 3. Comparison of maximum predicted and actual distances to selected AT isotherms produced dur- 

 ing two -unit operation. 



Distances in feet from quarry cut to each isotherm 



Tide stage 8.0°F (4.4°C) 6.0°F (3.3°C) 4.0°F (2.2°C) - 1.5°F (0.8°C) 



Max Flood 

 Predicted for 2 units 

 Hydrothermal survey, 7/29/77 

 SWEC predicted, 3 units (extreme) 

 Slack after flood (high slack) 

 Predicted for 2 units 

 Hydrothermal survey, 7/29/77 

 SWEC predicted, 3 units (extreme) 

 Max Ebb 



Predicted for 2 units 

 Hydrothermal survey, 7/29/77 

 SWEC predicted, 3 units (extreme) 

 Slack after ebb (low slack) 

 Predicted for 2 units 

 Hydrothermal survey, 7/29/77 

 SWEC predicted, 3 units (extreme) 

 S&A predicted 3 units 



1 from NUSCO 1979 



2 distance estimated from infrared survey on 7/29/77 



Hydrothermal Studies 327 



