Figure 4. Aerial view of dolos at heads of jetties after 1 982 rehabilitation 



Engineers (USACE 1994) and were designed to be placed in a single layer on 

 both steep and moderate slopes. The shape was designed to have much lower 

 stresses than existing slender armor units and to produce an armor unit with very 

 little rocking during design conditions. In addition, the unit was designed to be 

 used as a repair for dolos slopes. Various views of a CORE-LOC armor unit are 

 shown in Figure 10. This rehabilitation was the first application of CORE-LOCs 

 in the United States. The selected CORE-LOC matched the same maximum 

 dimension as the existing dolosse (3.4 m (11 ft)). The 2,720-kg (3-ton) weight 

 increase was due to the third fluke in the middle of the shank. The CORE-LOCs 

 were strengthened with reinforcing steel. 



Twenty-nine CORE-LOCs were placed on the north jetty and 16 on the south 

 jetty interlocking with the existing dolosse. In addition, nine dolosse were repo- 

 sitioned to improve the interlocking effect of the dolosse armoring, and several 

 broken units were removed. Other dolosse were repositioned slightly to provide 

 space for the new CORE-LOCs into the overall protection plan. A view of a 

 CORE-LOC armor unit on the south jetty head is shown in Figure 11. 



Chapter 1 Introduction 



