Figure 27. Dolos with straight shank-fiuke crack 



(0.25 ft) or less in the horizontal direction; all targets on the south jetty moved 

 0.064 m (0.21 ft) or less horizontally. In the vertical direction, target movement 

 did not exceed 0.067 m (0.22 ft) on the north jetty and 0.064 m (0.21 ft) on the 

 south jetty. 



Between 1994 and 1998, the average movement of the targets on the north 

 jetty was 0.061, 0.03, and 0.027 m (0.2, 0.1, and 0.09 ft) in the northing and east- 

 ing horizontal directions and the vertical direction, respectively. On the south 

 jetty, the average movement of the targets between 1994 and 1998 in the north- 

 ing and easting horizontal directions and the vertical direction was 0.027, 0.015, 

 and 0.027 m (0.09, 0.05, and 0.09 ft), respectively. This analysis indicates that 

 movement of target positions on the north jetty in the northing and easting hori- 

 zontal directions was slightly greater than the movement of units on the south 

 jetty since 1994. 



Horizontal displacement of the targets, in general, along the structure was in 

 several directions with movement away from the jetty center lines for some units 

 and toward the center line for others. Target movement also occurred parallel to 

 the jetty center lines both in the shoreward and seaward directions. There was 

 no dominance in these movement directions for targets on the jetties. The major- 

 ity of the horizontal movements on both jetties was less than 0.03 m (0.1 ft). 

 Vertical displacements of the targets on both jetties was minimal. Some targets 



Chapter 3 Current Monitoring Plan and Data Comparison 



39 



