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KESER, LARSON, VADAS, AND McCARTHY 



CAUSEWAY MARSH 



0.5 1 



NAUTICAL MILES 



Fig. 1 Maine Yankee Atomic Power Company (MYAPCO) at 

 Wiscasset, Me., showing the stressed (Bailey) and control (Causeway) 

 marshes; Cowseagan Narrows causeway, C; and diffuser discharge, 

 D. Water intake and former surface discharge are indicated by 

 arrows. 



RESULTS AIMD DISCUSSION 



Hydrographic Data 



Average salinities at Causeway Marsh during 1975 to 1977 

 increased by 4.2%o at the surface and by 3.4%o at a depth of 3 m 

 (Fig, 2) compared with values from 1972 to 1974 (Vadas et al., 

 1976). Variabilities among monthly measurements declined, how- 

 ever. In contrast, salinity patterns at Bailey Marsh from 1975 to 

 1977 were similar to those from 1972 to 1974. 



Lower temperatures at Causeway Marsh during the early growing 

 seasons of 1975 to 1977 (April— July) resulted in lower yearly 



