Project Description

Mayflower Wind is currently focused on conducting baseline surveys, stakeholder outreach, and other activities that advance the initial design, engineering, and permitting of the project. The project will require local, regional, state, and federal permits and approvals for relevant onshore, nearshore, and offshore work.

In order to maximize the potential of the lease area capacity, Mayflower Wind is pursuing dual export cable routes to deliver the power to electricity customers via interconnection points at Falmouth and Somerset, Massachusetts.

No final decisions on site locations for project facilities will be made until a full routing analysis has been completed.

These efforts have been, and will continue to be, pursued with input from local communities to ensure a safe, reliable, and responsible project that meets the expectations of Massachusetts ratepayers and makes the Commonwealth a national hub for offshore wind.

Mayflower Wind executed a 20-year power purchase agreement in January 2020 for 804 MW with the Massachusetts electric distribution companies, after successful selection under the Commonwealth of Massachusetts’ Section 83C II solicitation. In September 2021, Mayflower Wind submitted proposals through the Section 83 C III solicitation. We anticipate notification of the bidding results in late fall 2021, and we expect to deliver clean energy from the project by the mid-2020s.

The work we are doing on the SouthCoast is convergent with our ongoing work on Cape Cod. From Falmouth to Fall River and surrounds, Mayflower Wind stands ready to bring the state’s clean energy goals to reality while supporting the people and communities who help bring the benefits of renewable offshore wind energy to our shorelines.

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Brayton Point area export cable routing map
Project infographic
Wind Turbines – Wind turbines convert kinetic energy from the wind into electric power.

Offshore Station – The offshore substation enables the wind farm to operate more efficiently by stepping up voltage from 66 kV to 275 kV.

Landfall – The export cables connect onshore via an underground conduit tunneled deep beneath the beach.

Underground Cables – From the beach area, electric cables will be buried beneath town roads and transmit power to the onshore substation.

Onshore Substation – The onshore substation transforms the power to grid voltage, stepping up from 275 kV to 345 kV.

POI – The point of interconnection, or the point where Mayflower Wind’s facilities interconnect with the Transmission Owner’s facilities.

Interconnection Switching Station – The interconnection switching station collects power from the overhead lines and feeds into the transmission system.

Inter-array Cables – Electrical cables connect wind turbines to each other and transport power to the offshore substation at 66 kilovolts (kV).

Export Cables – Submarine cables buried beneath the seafloor transmit electric power from the offshore substation to the onshore substation.

Overhead Lines – An overhead 345 kV transmission line transports the power to an interconnection switching station.

Transmission System – An interconnected network of transmission lines that deliver electricity to end customers.