This line has since become a dumping ground for trash. Lack of drainage has loads of water in the cut at places as well. The tunnel under st. marys, last time I took a look maybe 3 years ago, was home to some homeless people and migrating birds (found a large yellow bird in there that I later found out is from Canada and lives in caves, thus it's use of the tunnel in migration). It's truly a filthy place...
I heard the MTA was going to or did buy this property to preserve for perhaps some future commuter link? Can't imagine what use they would have for it, but...