The Interior Department announced the approval Tuesday of a new commercial-scale offshore wind project in Massachusetts, clearing the way for up to 2.6 gigawatts of offshore wind power to be added to the power grid and moving the Biden administration one-third of the way to its target of 30 GW for offshore wind.

The Avangrid-owned New England Wind Project will be built roughly 20 miles south of Martha’s Vineyard, Interior Department officials said in a statement Tuesday. Once online, it is expected to generate enough wind power to supply more than 900,000 homes.