Steve Wynn’s Wynn Resorts is gearing up for another round of legal battle, one that could potentially delay the opening of the casino giant’s $1.7 billion casino project in Everett.

The Las Vegas casino operator just recently came out from a bitter fight with the city of Boston. Last week, gambling regulators in the state of Massachusetts approved the deal that would see the casino giant compensate the city for traffic and other expected problems associated with the casino in exchange for Boston City Mayor Martin Walsh agreeing to stop filing lawsuits against Wynn Resorts.

Now, another Boston suburb is challenging Wynn Resort’s planned casino development in Everett.

State media outlet WCVB.com reported that the city of Somerville filed an administrative appeal last Thursday that questions the environmental permit that the casino operator received from the Department of Environmental Protection early this year.