Interestingly, the plan to create harbours using nuclear detonations was seriously considered by Lang Hancock (The mining magnate) in Australia during the 70's,

Interestingly, the plan to create harbours using nuclear detonations was seriously considered by Lang Hancock (The mining magnate) in Australia during the 70's, as well as a method for extracting Iron Ore... http://www.abc.net.au/pm/content/2012/s3533473.htm http://www.abc.net.au/pm/content/2012/s3533473.htm