The Sedan Crater was the largest of the Project Plowshare series of underground nuclear blasts, 23 in all, to determine the feasibility of using nuclear devices to excavate large amounts of earth. Better living with nukes!
Yeah, sure, it all looked good on paper. A huge savings versus conventional explosives, something like a 3000% difference. And as the overlay shows, it works too. Moved a whole bunch of earth just by drilling one hole 635' deep and placing a 100 kiloton device in the bottom. With the press of one button, a crater 320 feet deep and 1,280 feet in diameter appears! Over 12 million tons of earth have just been displaced. And as a bonus, you only have 8 million tons of earth to deal with, because 4 million tons of it just kinda drifted away......
I just wonder why it took them 23 times to realize why this wouldn't work?
BEFORE
DURING
AFTER