survey and SCUBA diving inspection was conducted in July 1984. Side-scan 

 sonar records were used to identify sections which appeared to have changed 

 based on comparisons with the earlier records or areas which otherwise 

 appeared to have some unique aspects. The divers were then able to target 

 their inspections to those areas. Figures 9 through 11 are annotated side- 

 scan sonar records from the areas which were verified by diver observation. 

 Figure 9 is a section of the trunk viewed from the water surface looking down 

 the structure slope. Arrow A indicates the location of a high section of 

 dolos cover as shown by the long shadow. There appeared to be a large 

 depression in the cover (as shown by the short shadow) located about halfway 

 down the slope (B). This depression was verified by divers to be an 8- or 

 10-ft-wide section with no dolos cover. In addition, in this area the dolos 

 toe and underlayer berm are not well defined in the sonograph. Dolosse 

 appeared to have rolled over portions of the underlayer, and a few were even 

 found on top of the bedding stone. 



25. Figures 10 and 11 are from the head section and the transition 

 between the head and the trunk, respectively. Just to the right of arrow A at 

 the waterline (Figure 10), an indentation shows where dolosse were lost during 

 a storm. The dashed line (Figure 10) shows the dolos toe and the exposed 



Figure 9. Dolos trunk section of the east breakwater, 

 Cleveland Harbor, Ohio; range 50 m, towfish near 

 surface, 500 kHz 



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