EVERETT >> Wynn Resorts is starting construction on its $2 billion Boston-area casino after years of legal fights.

The Las Vegas-based company is building a resort casino complex on the Mystic River waterfront in Everett.

Wynn Boston Harbor President Robert DeSalvio and Everett Mayor Carlo DeMaria are expected to speak Thursday at the site of the future casino.

The site was formerly a chemical plant. Some environmental cleanup work was done earlier this year, and Wynn halted progress while legal challenges played out. The company had planned to break ground in April. It's now aiming for a 2019 opening.

On Wednesday, Wynn said it received a state environmental permit, one of the project's last major roadblocks.

Somerville officials, who had challenged the permit, say they're pursuing other ways to block the project.