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RI Coastal Resources Management Council preserve, protect, develop, and restore coastal resources for all Rhode Islanders

SouthCoast Wind (formerly Mayflower Wind)

SouthCoast Wind proposes to develop the entire lease area, located in federal waters off the southern coast of Massachusetts, 26 nautical miles south of Martha’s Vineyard and 20 nm south of Nantucket, Massachusetts. The developer is proposing up to 149 turbine positions in the lease area to be occupied by wind turbine generators (WTGs) and offshore substation platforms (OSPs). The 149 positions will conform to a 1 nm x 1 nm grid layout with an east-west and north-south orientation across the Massachusetts Rhode Island Wind Energy Area (MA/RI WEA). SouthCoast Wind executed a 20-year power purchase agreement for 804 MW.

SouthCoast Wind map

The Project will include two export cable corridors, one making landfall and interconnecting to the ISO New England Inc. (ISO-NE) grid in Falmouth, Massachusetts, and one making landfall and interconnecting to the ISO-NE grid at Brayton Point, in Somerset, Massachusetts.

Within the Falmouth export cable corridor, up to five submarine offshore export cables, including up to four power cables and up to one dedicated communications cable, will be installed. Within the Brayton Point export cable corridor, up to six submarine offshore export cables, including up to four power cables and up to two dedicated communications cables, will be installed from one or more OSPs within the Lease Area in federal waters, and run through the Sakonnet River, make intermediate landfall on Aquidneck Island in Portsmouth, Rhode Island, which includes an underground onshore export cable route, and then into Mount Hope Bay, to make landfall at Brayton Point in Somerset, Massachusetts. SouthCoast Wind will utilize horizontal directional drilling for the sea-to-shore transition of export cables between the ocean and the land.

SouthCoast anticipates notification of the bidding results in late fall 2021, and expects to deliver clean energy from the project by the mid-2020s.


Stedman Government Center
Suite 116, 4808 Tower Hill Road, Wakefield, RI 02879-1900
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