F,F,I ,GR ASS - Zostera marina is an important component of estuarine systems because it stabilizes 

 sediments and provides habitat for many marine organisms. In the early 1970s two studies were sponsored 

 by NUSCo and conducted by the University of Connecticut to document eelgrass distribution in the 

 MNPS area (Klotz and Knight 1973; Knight and lawton 1974). In 1985, NUSCo conducted a more 

 extensive survey which included mapping the extent of eelgrass in .lordan Cove, estimating standing stock 

 and monitoring plant density, length and reproductive status. These studies were conducted to compare 

 results of earlier eelgrass distribution and provide a quantitative data base prior to three-unit operations 

 to assess possible impacts on eelgrass after Unit 3 start-up. Initial results of the NUSCo studies show 

 average eelgrass densities ranged from 18 to 39 plants/m and average blade length ranged from 144-681 

 mm. Standing stock estimates at .Jordan Cove averaged from 39.4 to 297.7 g/m and were highest in July. 

 Effects of the thermal plume on the Jordan Cove eelgrass stock have not been evident during two unit 

 operating conditions. 



