The US Department of Interior (DOI) expects to complete its extended environmental review of Vineyard Wind, the nation’s first major offshore wind farm, “late this year or early next,” meaning construction is unlikely to start at the project site of Massachusetts before the second quarter of 2020.

After the so-called Supplemental Environmental Impact Statement (EIS) is issued, a public comment period will follow during which the Bureau of Ocean Energy Management (BOEM), a DOI agency, will also hold public meetings on the 800MW project.