I first learned about the possibility of using nuclear bombs for underwater construction when I listened to one of the interviews of Edward Teller on Peoples Archive. He was talking about building harbors in Alaska using nuclear charges.

Well, it occurred to me that this is probably going to be the only way to close off the BP oil leak which is coming out of the ground with such pressure that nothing seems to thwart it. There’s even a second leak bigger than the first, or so this article says. Thus, this story doesn’t surprise me.

http://rawstory.com/rs/2010/0529/energy-expert-nuke-oil-leak/