The $2.1 billion Wynn Boston Harbor casino will open in June 2019, Wynn Resorts executives told the state's Gaming Commission Thursday.
Robert DeSalvio, president of Wynn Boston Harbor, said scores of construction workers are at the waterfront site in Everett, and the company expects to have 250 workers on the project by year's end.
"For the first time, today I say before the Gaming Commission that casino construction is under way," said a smiling DeSalvio.
Construction began earlier this month, after the project received a waterfront development permit from the state's Department of Environmental Protection over an appeal by the City of Somerville.
Somerville Mayor Joseph Curtatone has said city officials are considering whether to file a separate appeal in Superior Court. The deadline is next week.
Curtatone has argued the casino, just across the Mystic River from Somerville, would worsen traffic and harm air quality.
A full-scale casino is under construction in Springfield and scheduled to open in 2018. The Mashpee Wampanoag tribe, meanwhile, has suspended construction of its Taunton casino, scheduled to open next summer, after a federal judge ruled last month that the US government improperly designated the site as a sovereign reservation.