Park Street below the mainline is lower, they could excavate this and get one to two feet additional clearance, maybe even three before reaching water level. Not enough to get to 14 feet I don't think, but it certainly could be lowered some.
Park Street has flooded occasionally before but they seem to have altered the drainage, it hasn't done that in a long time, even with this wet summer.
I think Park Street is 12 feet or so. It also gets hit once in a while, just a few weeks ago it did and some of the pieces have been laying there.