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Figure 28. Example of horizontal position of a target dolosse armor unit and additional 

 elevations obtained for 1994 and 1998 photogrammetric surveys 



rotated on the jetties, the majority consisted of those oriented with the vertical 

 fluke farther downslope and the horizontal fluke closer to the jetty center line. 

 Between 1994 and 1998, maximum horizontal displacements for any point on the 

 additional selected armor units were 0.122 m (0.4 ft) on both the north and south 

 jetties. The averages of the maximum horizontal movements of the additional 

 selected dolosse, between 1994 and 1998, were 0.043 m (0.14 ft) and 0.064 m 

 (0.21 ft) for the north and south jetties, respectively. Sixty-six percent of the 

 units on the north jetty and 55 percent of those on the south jetty had maximum 

 horizontal movements of 0.061 m (0.21 ft) or less at any point on the additional 

 selected (nontargeted) dolosse. In general, based on the photogrammetric 



Chapter 3 Current Monitoring Plan and Data Comparison 



51 



