Getting good info on that is practially impossible as anyone who knows isn't saying.
The story I heard is that there was a BATFE raid and that is what closed them down. I've also heard that it reopening with any of the current ownership involved is HIGHLY unlikely to happen. But that is from the rumor mill as no official announcement has been made by management.
I agree that it sucks as that was, by far, the best place to shoot around Pittsburgh. I don't know of any other range that has a 400m rifle range in this area. I believe they would also allow full-auto (legal, of course) and suppressors, which is another rarity in this area. They also allowed holster training, rapid fire, and most anything else (done safely, of course), which also is verboten at most places.
I just wish they'd cancel the PG announcements because every time I read them it gets my hopes up that they've reopened. Then I Google their website, see nothing has changed, and get a cold slap of reality.