Table 3 (Continued) 



Date(s) Construction and Rehabilitation History 



1883- Inner Jetties were constructed of horizontally placed willows 

 1887 (individual pieces were several inches in diameter) placed between 

 vertical piles and maintained to an elevation 4 ft above flood tide 

 level. More willows were added periodically as existing ones sub- 

 sided. The inner east Jetty was constructed about 200 ft inside the 

 east Jetty in two sections; a 1,940-ft section beginning near the 

 landward terminus of the east Jetty, and a 7,105-ft section extending 

 to the seaward end of the east Jetty. The 4,900-ft-long inner west 

 jetty was constructed about 150 ft inside the west Jetty (making the 

 inner Jetties 650 ft apart) terminating at its seaward end. Wing 

 dams of similar design were built between the inner Jetties and re- 

 spective outer Jetties creating rectangular compartments for trapping 

 and accumulating sediments. During October 1886 a hurricane further 

 damaged (removed) about 700 ft of the parapet wall near the seaward 

 end of the east Jetty. By 1887, accumulating sediments and settle- 

 ments had buried the west Jetty and landward 4,800 ft of the east 

 Jetty (although erosion of the deposited sediments east of the 

 Jetties was occurring). 



1889- In 1889, the east Jetty concrete cap was repaired along those sec- 

 1901 tions damaged during storms of 1882 and 1886. Approximately 3,710 ft 

 of cap and 810 ft of parapet wall were rebuilt, and 320 ft of new 

 parapet wall was constructed. Additional mats (as needed) and a 2- 

 ft-thick layer of riprap stone were placed up to flood tide level 

 prior to pouring new cap sections. Cap sections varied from 4 to 

 7 ft in width and 3 to 3-1/2 ft in height. During 1889-1893, con- 

 tinuous cribwork was placed beginning at the landward end of the con- 

 crete cap. It was extended landward several times, reaching a total 

 length of 2,245 ft. This cribwork was at least partially required 

 due to continuing erosion on the seaside of the Jetty (at a rate of 

 200 ft/yr along the Jetty). On several occasions, cribwork also was 

 placed on the seaward ends (several hundred feet of each) of the 

 inner Jetties, providing wave and current protection along these ex- 

 posed sections. The inner east Jetty was extended landward several 

 times (giving it a total length of 9,730 ft), employing the same con- 

 struction method used during 1883-1887. Extensions were required due 

 to continued landward recession east of the Jetty and the need to 

 limit sediment motions. In 1895, a storm destroyed the outer 100 ft 

 of the inner west Jetty. No subsequent repairs were made, leaving 

 the effective length 4,800 ft. Additional wing dams were built and 

 maintained together with those already built. In 1901, the con- 

 tractors were reimbursed in the amount of $8,000,000 for maintaining 

 the authorized channel dimensions for a cumulative period of 20 years 

 (noncontinuous) , which was the time period agreed upon in 1875. 



1902- The inner Jetties and connecting wing dams now maintained by the 

 1920 Corps were repaired and brought up to grade as needed. The outer 



(Continued) 



20 



