Table 17 



Newburyport Harbor Jetties 



Newburyport, Mass. 



Date(s) Construction and Rehabilitation History 



1881- Two rubble-mound jetties were constructed at the mouth of the Merri- 

 1899 mack River. The north and south jetties were 4,118 and 2,445 ft 



long, respectively, and built up to an elevation of +12 ft mlw with a 



15-ft top width. 



1900- Minor repairs were made on the north jetty using 640 tons of stone. 

 1902 



1905- The south jetty was repaired in 1905 with 850 tons of stone. During 

 1909 1906-09 a total of 19,800 tons of stone was used in repairing the 

 north jetty. Repair costs during this period totaled $8,730. 



1917- The north and south jetties were repaired with 7,1 40 and 1,750 tons 

 1918 of stone, respectively. Total costs were $18,400. 



1925 The north jetty was repaired with 1,600 tons of stone at a cost of 

 $4,600. 



1933 The jetties were repaired at a cost of $5,400 for placing 1,190 tons 

 of stone. 



1936- Repairs were made to the north and south jetties for a total cost of 

 1938 $143,700 using 29,930 and 7,810 tons of stone, respectively. 



1963 An inspection showed both jetties were in poor condition. 



1968- Extensive repairs were made to 2,920- and 1 ,095-ft-long sections of 

 1970 the north and south jetties. The repaired sections would best define 

 the existing lengths of the jetties (Figure 20, plan view). Also 

 completed were 700 lin ft of revetment adjacent to, and landward of, 

 the south jetty repairs. The north jetty repairs started from its 

 reconstructed landward end at 1+00 and continued to the existing sea- 

 ward end at 30+20. The south jetty repairs started from its recon- 

 structed landward end at 0+00, stopped at 6+00, started again at 

 10+05 and continued to its reconstructed seaward end at 15+00. An 

 undetermined length of south jetty seaward of 15+00 was not repaired. 

 Seaward of 5+50 both jetties were built up to +12 ft mlw with a 15-ft 

 crown width and slopes of 1V:1H and 1V:2H on channel and sea sides, 

 respectively. The landward sections (Figure 20, inset) had 1V:1.5H 

 side slopes, a crown width of 5 ft, and maximum crown elevations of 

 +17 and +15 ft mlw on the north and south jetties, respectively. The 

 stone size varied from a minimum of 0.5 tons at the landward ends to 

 a maximum of 12 tons at the seaward ends. The estimated quantity of 



(Continued) 

 40 



