The railroad yard was old, probably dating to the 1800s (would have to look it up). Built by the Boston & Albany RR, part of the New York Central System. It eventually went to Penn Central, then Conrail, and finally CSX Transportation. Well, CSX has pulled back to Worcester if I remember correctly, meaning that almost all freight now moves into and out of Boston by truck. The MBTA still runs commuter trains along the line that this yard was on.
That unfortunate reality aside, the abandonment of the yard means that the Allston interchange on the Mass Pike can be rebuilt and simplified and 60-100 acres of land reclaimed for new uses. Very cool!