Figure 22. Stereo pair photograph for Manasquan Inlet jetties (landward photograph image) 



jetties are shown in Figures 25-27. The detailed data obtained during the current 

 survey (1998) will allow for an accurate indication of new breakage when the 

 structures are revisited at some point in the future. 



In general, typical reasons for dolos breakage often include the following: 

 (a) stress patterns within the original cast dolosse, (b) handling and placement, 

 (c) settling of the structure, stressing units within the breakwater, (d) wave- 

 induced displacement, (e) wave-induced rocking and fatigue failure, (f) ice pres- 

 sure and movement, and (g) impact from debris, other dolosse, and dolos 

 fragments. 



34 



Chapter 3 Current Monitoring Plan and Data Comparison 



