They dug the hole, they can finish it. We have already dug enough debt holes. The Chicoms are supposedly building another hole in Nicaragua.
Actually, the US dug most of this hole back in WWII.
I didn’t realize just how much excavation was done back in the 40s for the third set of locks designed to handle the Midway class carriers and Montana class battleships. I knew that constuction was stopped due to a lack of steel for the locks, but actually digging out the new channels etc was pretty advanced. One of the reasons why the cost of this has been kept relatively low.