Table 30 (Continued) 



Date(s) Construction and Rehabilitation History 



1936 827 tons of rock and 96 cu yd of concrete were placed to repair 

 (Cont) breaches in jetties. The efforts to reinforce the sheet pile with 

 riprap failed, and erosion shoreward of the jetty wings continued, 

 making further shoreward extensions of the jetties necessary. The 

 cost of repairs, as of 1 July, was $74,600 (FY 35). The 31 July 

 hurricane severely damaged the jetties. The average crest elevation 

 of the jetty wings was +1 ft mlw, and considerable erosion occurred, 

 especially along the west jetty wing. 



1937- Sheet pile (259 lin ft) was placed along the shore near the west 

 1938 jetty wing, and 7,600 sq ft of sheet pile was salvaged from damaged 

 bulkheads. Including preparations for jetty repairs and maintenance 

 dredging, the total cost, through 30 June 1937 (FY 36), was 

 $159,300. Repairs to jetties (including the wings) were made with 

 hot asphaltlc concrete and precast reinforced asphaltic concrete 

 mats. The 2-ln. -thick asphaltic mats extended 24 ft from the toe of 

 the jetties and were anchored at the toe with precast asphaltic con- 

 crete blocks. The mats were consolidated with the existing jetty 

 section by placing hot asphaltic concrete to form an impermeable 

 section with a top width of 8 ft and elevation of +6 ft mlw. The 

 east and west jetty wings were extended 210 and 270 ft, respec- 

 tively. These extensions were made by grading sand slopes and 

 covering with 2 layers of asphaltic mat. Steel sheet-pile retaining 

 walls (10,300 sq ft) were placed along the inner ends of the 

 jetties. Asphaltic mats (167,000 sq ft) and 25,870 tons of asphal- 

 tic hot mix and blocks were placed on various sections of the 

 jetties. The cost of the jetty repairs plus maintenance dredging 

 through 30 June 1938 (FY 37) was $469,700. 



1939- In 1939 the east and west jetty wings were extended 110 and 400 ft, 



1941 respectively. These extensions and additional repairs were carried 

 out by placing 1,465 and 1,540 tons of stone on the east and west 

 wings, respectively. A 200-ft-long west jetty cross wall was con- 

 structed by placing 205 tons of stone. Although no details were 

 available, the 100-ft-long east jetty cross wall was probably con- 

 structed about this time. An additional 820 and 2,370 tons of rip- 

 rap and cover stone were placed on the west jetty during 1940-41 

 repair work. A total of 11,200 sq ft of steel sheet pile was sal- 

 vaged as part of the jetty repair work. The cost of the 1939 jetty 

 repairs and maintenance dredging was $50,400 and of the 1940-1941 

 jetty repairs was $35,900. 



1942 The east jetty wing was extended 570 ft using 1,380 and 3,160 tons 

 of riprap and cover stone, respectively. The west jetty wing was 

 extended 400 ft using 640 and 2,030 tons of riprap and cover stone, 

 respectively. The design cross section (Figure 48, inset) had a 



(Continued) 



(Sheet 2 of 6) 



88 



