Mr. Purple Cat Esq. thats a good question man.. There might have been a tiny bit of rock that they very slowly added to.
The modern way of doing something like that (like a bridge cassion) would be to float it out and then sink it where you want it.
Also, unless the pay is stellar, fuck this job. I'd rather loot the debris that washes up on shore.
SteamPoweredKleenex I have no idea why that came out bold. I wish I did. I'd be bolder more often, as my barbecue sauce tells me I should.
TESTING FOR MORE BOLD