Boston - The City of Boston refused to accept a $1 million check to help offset the impacts of the resort casino planned for neighboring Everett, gambling giant Wynn Resorts said Wednesday.

Boston sued the Massachusetts Gaming Commission earlier this week, seeking to stop the $1.6 billion project from going forward unless residents in the city's Charlestown neighborhood are given a vote.

Wynn said the $1 million check was delivered to the commission after Boston declined it, and is expected to be held in escrow for the city.

The payment is supposed to be used to support nonprofit organizations and other programs in Charlestown, the Boston neighborhood located directly across the Mystic River from Wynn's planned waterfront development.

The payment is the first in a minimum $56 million financial compensation package for Boston that was ordered by the gambling commission after Boston Mayor Martin Walsh's administration refused to participate in negotiations with the Las Vegas casino giant.

The compensation package orders Wynn to spend a total of $31 million toward improving traffic in heavily congested Sullivan Square - a key concern of the city. It also calls for $24 million in total annual payments to Boston and includes a provision that if Wynn fails to meet its traffic projections, it will pay the city up to $20 million more in fees.

Walsh's administration and the state gaming commission did not immediately respond to requests for comment.

Boston's lawsuit, filed Monday against state gambling regulators, argues that city residents should be allowed a vote on Wynn's project because the only "legal access" to the casino site goes through Charlestown.

Wynn was awarded a state gambling license in September. On Monday, Wynn announced it had finalized the $35 million purchase of the 33-acre casino site. The resort is tentatively slated to open by 2017.