Table 88. Ashtabula Harbor Breakwaters Ashtabula, Ohio

Table 88

Ashtabula Harbor Breakwaters

Ashtabula, Ohio

Date

Construction and Rehabilitation History

1897-

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

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

1924

breakwater had a

ft crest el lwd and a 10-ft-wide crest (Fig-

ure 240, Sections N and 0 ) . Side slopes were

on the lakeside

and

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-

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

1909

a rubble-mound structure with a crest width of 1 ft and an

0

water

(Figure 241, Section S. Side slopes on the lake-

)

ft

el of

side were

and

on the shoreward side. Cover stone

with a 3-ft thickness was used.

1912-

Construction of a 3,692-ft-long rubble-mound east breakwater (Fig-

1915

ure 239, Section

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-

extensions of the east and west breakwaters (Figure 239,

1936

Sections R and

were completed, These were rubble-mound extensions

and crest widths of 1 ft (Figure 240,

0

with crest els of

ft

Sections Q and R. Side slopes were

)

Armor stone had a

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

more.

A

1977

rubble-mound westward extension of the inner break-

I

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

tion

had a crest width of 27 ft with a

ft lwd el. Side slopes

were

and cover stones ranged from 3.25

t o 7.25 tons

.

1981-

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

1982

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

I

The east breakwater head rehabilitation (Figure 242) involved a

51-ft-wide crest width with an el of

ft

and side slopes of

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

ft lwd. The west breakwater rehabilita-

tion (Figure 242) consisted of armor stone ( 7 to

tons) placement

ft and a width of 17 ft. Side

on the lakeside to an el of

slopes used on the trunk sections were

(Continued)

355