Table 88 



Ashtabula Harbor Breakwaters 



Ashtabula, Ohio 



Date(s) Construction and Rehabilitation History 



1897- Construction of a 6,600-ft-long rubble-mound west breakwater (Fig- 

 1924 ure 239, Sections N and 0) was performed during this time. The 



breakwater had a +10.3 ft crest el Iwd and a 10-ft-wide crest (Fig- 

 ure 240, Sections N and 0). Side slopes were 1V:1.5H on the lakeside 

 and 1V:1.3H on the harbor side. Armor stone was greater than 3 tons 

 in weight. A 430-ft-long portion of the rubble- mound breakwater was 

 built adjacent to an existing timber crib structure (Figure 239). 



1901- The 1 ,298-ft-long eastern portion of the inner breakwater (Fig- 

 1909 ure 239, Section S) was constructed during this period. The break- 

 water was a rubble-mound structure with a crest width of 10 ft and an 

 el of +10.3 ft Iwd (Figure 241, Section S) . Side slopes on the lake- 

 side were 1V:2.5H and 1V:0.75H on the shoreward side. Cover stone 

 with a 3-ft thickness was used. 



1912- Construction of a 3,692-f t-long rubble-mound east breakwater (Fig- 

 1915 ure 239, Section P) was completed during this period. The breakwater 



cross-section was similar to that of the west breakwater built from 



1897-1924 (Figure 240, Section P) . 



1934- Lakeward extensions of the east and vjest breakwaters (Figure 239, 

 1936 Sections R and Q) were completed. These were rubble-mound extensions 

 with crest els of +10 ft Iwd and crest widths of 10 ft (Figure 240, 

 Sections Q and R) . Side slopes were 1V:1.3H. Armor stone had a 

 minimum weight of 3 tons with not less than 50 percent of 5 tons or 

 more. 



1977 A 100-f t-long, rubble-mound westward extension of the inner break- 

 water was completed. The extended head section (Figure 241, Sec- 

 tion S) had a crest width of 27 ft with a +10 ft Iwd el. Side slopes 

 were 1V:1.5H, and cover stones ranged from 3.25 (min) to 7.25 tons 

 (max) . 



1981- Major rehabilitation of the east and west breakwater trunks (Fig- 

 1982 ure 239) and the western head of the east breakwater was completed. 

 The east breakwater head rehabilitation (Figure 242) involved a 

 51-ft-wide crest width with an el of +10.3 ft Iwd and side slopes of 

 1V:2H. Armor stone ranging from 9.5 to 19 tons was used. The trunk 

 section of the east breakwater was repaired by the addition of armor 

 stone ranging from 3.7 to 15 tons (Figure 241). The crest was 13 ft 

 wide and had an el of +10.3 ft Iwd. The west breakwater rehabilita- 

 tion (Figure 242) consisted of armor stone (7 to 19 tons) placement 

 on the lakeside to an el of +10.3 ft and a width of 17 ft. Side 

 slopes used on the trunk sections were 1V:1.5H. 



(Continued) 



355 



