Table 17 



Jones Inlet Jetty 



Jones Beach State Park, New York 



New York District 



Date(s) Construction and Rehabilitation History 



1959 A 5,200-ft-long jetty was constructed to provide inlet stabilization, 

 and a sand barrier was constructed to prevent shoaling of the inlet 

 (Figure 22). The jetty was constructed in four sections. The land- 

 ward section (Section 1) was 1,150 ft in length and had a crown 

 width of 6.0 ft and side slopes of 1V:1.5H. Minimum capstone sizes 

 were 5.0 tons, and core stone was 10 lb to 3.0 tons. Section 2 was 

 3,650 ft long and had a crown width of 8.0 ft and side slopes of 

 1V:2H, except the shoreward 1,850 ft on the western side, which was 

 1V:1.5H. Minimum capstone used was 5.0 tons, and core stone was 

 15 lb to 4.0 tons. Section 3 was 350 ft long and had a crown width 

 of 12.0 ft and side slopes of 1V:2H. Capstone used was 8.0 ton mini- 

 mum, and core stone was 15 lb to 5.0 ton. Section 4, the most sea- 

 ward section, was 50 ft and had a crown width of 15 ft and side 

 slopes of 1V:2.5H. Stone sizes were the same as those in Section 3. 

 All crest elevations were +9.0 ft mlw. The jetty rested on a 2.0-ft- 

 thick blanket that extended 20 ft west from the base of Sections 1 

 and 2 and extended 30 ft from both sides of the base of Section 3, 

 except for 125 ft on the seaward west side. A 2.0-ft-thick apron 

 extended 100 ft from the toe and curved to intersect the blanket in 

 Section 3. The useful life of the jetty was expected to be 20 years. 



1962 The Middle Atlantic coastal storm of 6-8 March 1962 damaged the 

 jetty. The outer 200 ft was raveled and broken down to the high 

 water level. A second layer of capstone was added to the outer 

 120 ft to restore the original design. The adjacent 1,080 ft shore- 

 ward was repaired by replacing armor stone and by adding stone. 

 Armor stone was replaced on the adjacent 900 ft shoreward. 



1985 The jetty had nearly reached impoundment. Sand was bypassing the 

 jetty, mostly through large voids at the jetty-shoreline intersec- 

 tion. The apron had settled approximately 7.0 ft at the seaward end 

 due to sand loss through voids in the apron. 



1986 No further repair or maintenance information has been found. 



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