Table 13 

 Wells Harbor Jetties 

 Wells Harbor, Maine 



Date(s) Construction and Rehabilitation History 



1961- Two rubble-mound jetties were constructed to protect the 8-ft-deep 



1962 channel to Wells Harbor. The north and south jetties, 580 and 920 ft 

 long, respectively, converged at approximately a right angle to a 

 distance of 420 ft where the north jetty terminated and the 340-ft 

 seaward leg of the south jetty began (Figure 15, present plan view). 

 Design crown elevations varied from +13 ft mlw at the jetties' sea- 

 ward ends to +17 and +16 mlw at the landward ends of the north and 

 south jetties, respectively. Crown widths were 5 and 7 ft along 

 landward and seaward jetty sections, respectively. Specified side 

 slopes were 1V:1.5H. A 1-ft-thick bedding layer and core of 3-in. to 

 150-lb stone was covered with a double layer of stone weighing a 

 minimum of 2 and 3 tons on landward and seaward sections, 

 respectively. The cost for placing 20,000 tons of stone was $95,600. 



1962- The north jetty was extended 200 ft seaward, and 100 ft of stone wave 



1963 absorber was placed on the landward, channel side of the south jetty. 

 Additional work included placing 650 ft of stone revetment and fill 

 material at the south jetty's landward end. The north jetty extension, 

 constructed parallel to the south jetty's seaward leg, had a +13 ft 

 mlw crown elevation, an 8-ft crest width, and 1V:1.5H side slope (Fig- 

 ure 15, inset). The section consisted of a core and 1.5-ft- thick 

 bedding layer of 0- to 700-lb stone, followed by a 2-ft-thick under- 

 layer of 1,000- to 2,000-lb stone, and covered with a layer of 5- to 



7- ton stone. The south jetty wave absorber was 5 ft thick, had a top 

 elevation of +14 ft mlw, and a 1V:1.5H side slope. A double layer of 

 1- to 2-ton (minimum) stone placed on a 1.5-ft-thick bedding layer of 

 0- to 200-lb stone comprised the wave absorption material. The jetty 

 extension cost $29,600 using 3,800 tons of stone, while the costs of 

 the revetment, wave absorber, and fill material amounted to $38,400. 



1966 The north and south jetties were extended seaward 1,225 and 1,300 ft, 

 respectively. Extensions were parallel to one another, spaced 425 ft 

 apart, and terminated at a depth of -8 ft mlw. The design geometry 

 consisted of a +16 ft crown elevation, a 12-ft crown width, and 

 1V:1.5H side slopes. The section was built up on a 1.5-ft-thick 

 bedding layer of 1- to 50-lb stone, followed by a core of 1- to 

 300-lb stone, followed by a 4-ft- thick underlayer of 0.4- to 1-ton 

 stone, and covered with a layer of 4- to 6-ton stone. The 100-ft- 

 long jetty heads required 1V:2H side slopes, a 5-ft-thick underlayer 

 of 0.5- to 2- ton stone, and two layers of 8- to 12- ton cover stone. 

 A total of 119,000 tons of stone was placed at a cost of $594,600. 



1968- Visual inspections indicate the jetties were in good to excellent 

 1985 condition. 



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