PART III: CERC FIELD EXPERIENCE 



18. During the past 7 years, CERC has been involved in a number of 

 projects where side-scan sonar was used to document some facet of a coastal 

 structure. Initial work was carried out under the Monitoring Completed 

 Coastal Projects (MCCP) Program at Cleveland Harbor, Ohio. The success of the 

 monitoring effort at Cleveland (Pope and Clark 1983; Patterson and Pope 1983; 

 Rowan, Pope, and Hemsley, in preparation) prompted the use of side-scan sonar 

 at other MCCP projects; Manasquan Inlet, New Jersey; Ocean City, Maryland; 

 Burns Harbor, Indiana; and East Pass, Florida. In addition, Corps districts 

 have used their own and CERC's expertise in inspecting other structures. 

 Additional project sites discussed in this section include Calumet Harbor, 

 Illinois; St. Lucie Inlet, Florida; and Crescent City, California. A summary 

 of selected CERC side-scan sonar experience is presented in Table 1 . 



Table 1 



Selected Summary of CERC Side-Scan Sonar Experience 



for Structure Inspection 



Location/Structure Survey Date(s) 



Results 



Cleveland, OH/ 

 breakwaters, 

 revetments 



Manasquan, NJ/ jetties 



Ocean City, MD/ jetty 

 scour hole 



Calumet Harbor, IL 

 Burns Harbor, IN/ 



breakwater and 



jetties 



Crescent City, CA/ 

 breakwater 



St. Lucie Inlet, FL/ 

 jetties 



East Pass, FL/ jetties 



7/81 

 8/82 

 7/84 



7/84 



4/84 

 9/84 



9/85 



10/85 

 7/86 



4/86 



4/86 



Documented condition of dolos rehabil- 

 itation and imaged a variety of 

 coastal structures. 



Documented condition of dolos rehabil- 

 itated jetties. 



Documented coverage of rock layer over 

 scour prone area adjacent to jetty. 



Inspected cellular cofferdam break- 

 water, timber cribs, and rubble- 

 mound breakwater. 



Inspected dolos rehabilitated 

 breakwater . 



Inspection of structure to determine 

 optimum location of sand bypassing 

 plant. 



Inspection to determine condition of 

 structure. 



15 



