Ⅰ. DREDGING-DEFINITION 
	  
	DREDGING IS AN EXCAVATION ACTIVITY OR OPERATION USUALLY CARRIED OUT AT LEAST PARTLY UNDERWATER, IN SHALLOW SEAS OR FRESH WATER AREAS WITH THE PURPOSE OF GATHERING UP BOTTOM  SEMIMENTS AND DISPOSING OF THEM AT A DIFFERENT LOCATION. 
 
	
 
 
 
	
 
 
	MAINTENANCE & RECOVERY 
	  
	 