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of the Corps' beach nourishment project on the nearshore aquatic environment. 

 The study performed by the service included aerial photographic surveys of the 

 study area; measurements of dissolved oxygen, turbidity, and suspended partic- 

 ulate matter levels; and collection of lake bottom sediments, macrozoobenthos 

 and fish. 



Analysis of the aerial photographs showeii that the beach face profile 

 changed markedly during the study as a result of beach nourishment. Dredging 

 of about 19,000 cubic meters of beach sediment from an accretion area adjacent 

 to the harbor's north breakwater caused the beach face to recede, while depo- 

 sition of this sediment on a feeder beach south of the harbor caused the beach 

 face there to extend lakeward. Deposition on a second feeder beach south of 

 the harbor of about 35,000 cubic meters of sediment from a land borrow site 

 caused the beach face at the second feeder beach to extend lakeward. One 

 year after the beach nourishment project was completed the beach face in the 

 accretion area had returned to its predredged location, while the beach face 

 south of the harbor still occupied a position similar to that observed at the 

 completion of the beach nourishment project in October 1981. Analysis of the 

 other data collected revealed no change in the particle-size distribution of 

 the bottom sediments, the water quality, or the distribution and abundance of 

 macrozoobenthos and fish in the study area that could be attributed to the 

 Corps' beach nourishment project. It is concluded, therefore, that the beach 

 nourishment project conducted at Lexington Harbor in October 1980 had no sig- 

 nificant adverse impact on the nearshore aquatic environment in the study 

 area. 



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