The report, made public Thursday, highlights recent work at the southeastern Massachusetts facility, including laying carpets and building the live entertainment and sports bar areas.
It also shows the estimated cost for the project has risen by $25 million to $250 million. Of that, about $145 million has already been spent.
Penn National Gaming is developing the casino, which would offer slot machines and other electronic games but not traditional table games. MGM is developing an $800 million resort in Springfield; Wynn is building a $1.7 billion one in the Boston area.