for the remainder of its length. The south jetty was originally constructed 

 in 1935 with a length of about 725 m (2,380 ft). The shoreward section 

 paralleled the north jetty for a distance, and then it angled toward the 

 north jetty, reducing the inlet width. It then paralleled the north jetty 

 again at its seaward end. The crest elevation of all but the seaward por- 

 tion was +1.4 m (+4.7 ft) mlw. The elevation of the outer 110 m (360 ft) 

 of the jetty decreased from +1.4 m (+4.7 ft) mlw to 1.2 m (4 ft) above the 

 existing bottom. 



A new south jetty section was constructed in 1985. It was about 395 m 

 (1,300 ft) in length and offset 9.1 m (30 ft) southerly of the existing jetty 

 center line. The existing jetty was left intact. The new section was con- 

 structed with core stone, intermediate stone, one layer of capstone, and 

 precast concrete units along the center line (in the trunk) to form a core 

 impermeable to sand transport. The elevation of the structure was in- 

 creased to +2.3 m (+7.5 ft) mlw, and capstone ranged from 5,445 to 

 13,610 kg (6 to 15 tons). The impermeable core wall along the center line 

 consisted of precast, steel-reinforced, concrete units with tongue-in- 

 groove interlock joints to maintain alignment and impermeability. The 

 units were 1.8 m (6 ft) wide by 0.6 m (2 ft) long by 1.8 m (6 ft) high. 



In addition to the south jetty, three headland breakwaters were con- 

 structed to stabilize the shoreline adjacent to the shore end of the jetty. 

 These structures were constructed to an el of +1.8 m (+6 ft) mlw with cap- 

 stones ranging from 2,720 to 4,535 kg (3 to 5 tons). One was 104 m 

 (340 ft) in length and tied into the south jetty, and the other two were each 

 61 m (200 ft) in length. 



The rehabilitated south jetty at Ocean City Inlet was monitored during 

 the period October 1986 through January 1989 (Bass et al. 1994) as part 

 of the MCNP program. Activities included beach and offshore surveys, 

 aerial and ground photography of the inlet and adjacent shorelines, inlet 

 hydraulic surveys, nondirectional wave gauging, and side-scan sonar sur- 

 veys of scour areas. 



The rehabilitated south jetty and headland breakwaters at Ocean City 

 Inlet were inspected on 11 June 1997. The rehabilitated south structure is 

 shown in Figures 54 and 55, and the headland structures are shown in Fig- 

 ure 56. The inspection revealed these structures to be in excellent condi- 

 tion. No voids were noted, no armor stones were broken, and the cross 

 sections of the structures appeared to be as built. It was noted that the sea- 

 ward section of the old south jetty (that extending beyond sta 13+00) was 

 in disarray. Armor stones were scattered, the crest height was inconsis- 

 tent, and no definite cross section was apparent (Figure 57). 



Chapter 2 Project Descriptions and Inspection Results 47 



