I'm sure I remember years ago there was a leak of information where one of our Vanguard class missile submarines (the RN equivalent of the Ohio class) struck some sort of undersea mount and stove piped the whole front of the submarine and heavily damaged the Ballast tanks. They managed to limp back to port.

I'm sure a similar thing happened to one of your Virginia class submarines years ago and by the description of the damage it was an absolute miracle and testament to the crews abilities with damage control that the boat was saved.