Maintenance Dredging / Rock Removal, Portland Harbor, Maine
|Client:||US Army Corps of Engineers, New England District|
|Project Date:||January, 2014 - March, 2014|
This was the first maintenance dredging in Portland Harbor to occur in over 15 years. Crews worked 24 hours a day, seven days a week to complete the project within the environmental work window when dredging could be performed (Nov. 1 - March 15). The project required removal of ~700,000 cubic yards of sediment from the harbor's shipping channel. In addition to maintenance dredging, Cashman drilled and blasted ~1,500 cubic yards of rock.
- Crews worked 24 / 7 to complete the project, which removed ~700,000 cubic yards of sediment from Portland's shipping channel.
- Dredging was performed to achieve -37 feet mean lower low water (MLLW).
- The rock drilling and blasting portion of the project entailed the removal of five rock pinnacles protruding just above the -35 foot MLLW plane, totaling ~1,500 cubic yards.
- Cashman used the Dale Pyatt, the F.J. Belesimo, and the Kraken to complete the work.
- Lobster relocation was conducted prior to dredging, requiring close coordination with all parties.
- Dredged material disposal was in open water at the Portland Disposal Site, ~10 nautical miles away.