Steel foundations for the Block Island offshore wind farm, the first to be built in the US, are being shipped to the Rhode Island site.
Built in Houma, Louisiana, the foundations are being shipped north on three barges. The first barge is scheduled to arrive on site by mid-July.
The foundations for the five-turbine wind farm are approximately 170ft tall and weigh 1,500t. They are expected to be installed by mid-September.
Developer Deepwater Wind said work on the project will stop over winter and will resume in spring 2016 with the installation of the undersea cables, followed by the turbines themselves.
The wind farm is expected to be operational in the fourth quarter of 2016.