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(6) development of offshore sand sources for beach 

 restoration; 



(7) low flow augmentation; 



(8) conduct of design and research studies of estuaries 

 at Corps laboratories; 



(9) administration of Federal laws protecting and 

 preserving U.S. waters; and 



(10) flood and hurricane protection. 



In addition, it must be noted that the Corps of Engineers programs 

 of dam building, flood control and river clearance upstream from 

 the estuarine zone have very definite effects on the fresh water 

 inflow to the estuary. Its study programs cover many facets of 

 estuarine research, including physical, chemical, biological, and 

 ecological factors. The comprehensive study of the Chesapeake Bay 

 authorized in 1965 but not yet undertaken, is a typical example of 

 Corps activity in this area. 



Department of Transportation 



The Department of Transportation is the fourth Federal agency whose 

 programs have a direct and significant effect on the resources and 

 the use of the estuarine zone. 



Under this Department the Coast Guard performs a series of service 

 activities of essential importance to the beneficial use of the 

 estuaries. These include: 



