Sometime in 2019, construction on Vineyard Wind, the first major offshore wind farm in the United States, will begin. Workers will start prepping a pair of undersea substations to be installed about 55 kilometers south of the Massachusetts mainland. A specially equipped trawler will lay undersea transmission cable between the site and a landfall on Cape Cod. The cable will connect to the switching station in Barnstable, and from there to the New England power grid.
Meanwhile, the first of 84 wind turbines, 9.5 megawatts each, from MHI Vestas will be shipped to the site and installed in an array that will populate a 650-square-kilometer expanse and generate some 800 MW. The exact timetable for all that work is uncertain, though. The developers—Copenhagen Infrastructure Partners and Avangrid Renewables—declined to be interviewed for this story.