The Massachusetts law legalizing casinos was passed in November 2011. In downtown Springfield, MGM Resorts is building a $950 million resort casino that is expected to be the first full casino in Massachusetts when it opens its doors in September 2018. “Today’s announcement is a critical step towards our goal of saving Connecticut jobs and revenue,” Mohegan Tribe Chairman Kevin Brown said in a statement. East Windsor is about six miles from the Massachusetts state line and abuts Interstate 91, which leads directly to Springfield. With Massachusetts inching closer to opening its first full-fledged casino, the Mashantucket Pequot and Mohegan Tribes - working together as MMCT Ventures - selected East Windsor as the site of their proposed casino. The competition for western New England gambling dollars heated up Monday when the two tribes operating casinos in Connecticut announced their plan to build a third casino about 13 miles from the planned MGM casino in Springfield. News CT tribes plan casino 13 miles from MA The Lawn on D Powered by Citizens Bank Overview.Hynes Veterans Memorial Convention Center