Table 4 (Continued) 



Date(s) Construction and Rehabilitation History 



1976 The west Jetty was repaired with stone at 63+00 to 124+90 and 142+40 

 to 191+80 (seaward end). The stone size ranged from 300 lb to 

 3 tons, with the largest pieces used as cover stone. The design 

 cross section (Figure 14c) had a crown elevation of +6 ft mlg, crown 

 widths of 5 and 6 ft (landward and seaward of 118+50, respectively), 

 and 1V:1.5H side slopes. It appears that a survey benchmark error 

 occurred and that the actual crown elevation could have been +7.4 ft 

 mlg. An October 1975 survey showed an average center-line elevation 

 of +2 ft mlg on the sections to be repaired and from +4 to +5 ft mlg 

 on the remaining sections. The total cost of the repair work was 

 $3,517,200 using 186,760 tons of stone. 



1978 Three sections of the east jetty were repaired (Figure 13b) at the 



following locations: 108+25 to 150+00, 165+50 to 206+50, and 244+50 

 to 250+00. Graded stone (less than 5,000 lb in size) was placed to 

 an elevation of +6 ft mlg with crown widths of 5 and 8 ft landward 

 and seaward of 146+00, respectively, and 1V:1.5H side slopes. Pre- 

 existing center-line elevations, from a May survey, were +3 to +6 ft 

 mlg along the repair sections, and +6 to +7 ft mlg elsewhere. A 

 total of 48,000 tons of stone was placed at a total cost of $760,000. 



1980 Two sections of the west Jetty were repaired (Figure 14c) with armor 

 stone (possibly 2- to 4-ton size). The crown elevation was +6 ft 

 mlg, and the side slopes were 1V:1.5H. The landward section, from 

 20+00 to 63+00, had a 5-ft crown width; and the seaward section, from 

 123+00 to 142+40, had a 6-ft crown width. Prior to repairs, an April 

 1979 survey showed center-line elevations averaging +4 ft mlg within 

 the repair areas and from +4 to +7 ft mlg over the remainder of the 

 Jetty. Total cost of the repair work was $1,104,300 using approxi- 

 mately 43,000 tons of stone. 



1981- The landward and seaward ends of the east jetty were repaired 

 1982 (Figure 13b) with armor stone (possibly 2 to 4 ton size) at the 

 following locations: 108+25 (landward end) to 150+30, 155+70 to 

 165+40, and 217+55 to 250+00 (seaward end). The design geometry had 

 a +6 ft mlg crown elevation, 1V:1.5H slide slopes, and crown widths 

 of 5 ft (landward of 146+00) and 8 ft (seaward of 146+00). Prior to 

 repairs, center-line elevations (September I98O survey) varied from 

 +4 to +6 ft mlg along the landward sections, from -2 to +6 ft mlg on 

 the seaward section, and from +5 to +7.5 ft mlg elsewhere. Total 

 cost of the repairs was $820,000 using 37,500 tons of stone. 



1984 Repairs were made to both Jetties using 2- to 4-ton stone. The east 

 Jetty was repaired at three sections 170+00 to 178+50, 192+50 to 

 209+50, and 242+50 to 250+00 (seaward end), and the west Jetty was 

 repaired at 3 sections 103+00 to 124+00, I6O+OO to 166+50, and 176+00 

 to 191+50 (seaward end). Stone was placed to +6 ft NGVD, 1V:1.5H 



(Continued) 



35 



