Table
Portland Harbor Breakwaters
Portland, Maine
Date
Construction and Rehabilitation History
1836
A 2,000-ft-long stone breakwater was constructed on the south side of
the Portland ship channel (Figure 10, location map). Since construc-
tion, the majority of the breakwater has been backfilled forming the
eastern end of the South Portland waterfront.
An additional 900-ft-long stone breakwater was constructed easterly
1951
of a 15-ft crown width with a +15
mlw crest el and slopes of
on the harbor and sea sides, respectively. The
and
core stone was 0.5 to 5 tons each and the cover stone, comprising
percent of total tonnage, was 5 to 1 1 + tons each. Total stone
placed was 48,000 tons at a cost of 8,700.
During this time frame, visual inspections indicated that both
breakwaters were in good condition. The newer 900-ft-long breakwater
1985
had some slope stone slippage.
1986
The breakwaters have no known repair history.
2
1
Previous Page
