isotherm extends up to 2,100' offshore while the 1.5 

 isotherm is approximately 3,000' off the cut. An extension 

 of the 1.5 isotherm to the west is probably a remnant of the 

 previous flood tide. 



Vertical profiles (Figure 16) indicate the base of the plume 

 close to shore is approximately 20' deep and decreases to 

 about 10' beyond 1,000 feet from shore. Station HS5 in 

 Jordan Cove shows the base of the plume to be quite shallow; 

 less than 5' deep. Station HS6 located off the Unit 1 intake 

 shows no major influence from the thermal plume. A small 

 amount of dye was detected throughout the water column 

 indicating minor recirculation, but the uniform distribution 

 indicates complete vertical mixiny of the recirculated water. 



4 . 3'. 4 



laximum Ebb 



During maximum ebb tide (Figure 13) the thermal plume is 

 carried to the east toward Twotree Island Channel. The 4 

 isotherm extends up to 2,500' to the SE and extends northeast 

 into Jordan Cove. The 6° isotherm closely follows the 4° 

 isotherm while the 8° isotherm shows greater areal extent 

 than observed on previous tidal phases. The 1.5° isotherm 

 was mapped as a narrow finger extending up to 12,500' to the 

 SE through Twotree Island Channel. 



The 4 and 1.5 isotherms in Jordan Cove are limited to the 

 eastern portion of the cove. No dye was detected in the 

 northern or western parts of the cove. Vertical profiles 

 through the plume (Figure 17) show it to have a depth of 15 

 to 20' within 500' offshore (Profiles MEl and ME2). Beyond 

 1,000' from shore the plume as defined by the 4° isotherm 

 extends down to approximately 5' (Profiles ME3 and ME4). 



- 16 - 



