Very small compared to coal draglines like "big muskie"

Why make a mere train to eventually make a building, when you can make a large building that moves?

https://en.wikipedia.org/wiki/Big_Muskie

Interesting to think that Big Muskie was significantly larger in all dimensions than the residence hall I lived in for my first year of university. One machine moved more material than two panama canals in its lifespan...

Big Muskie was not a fast mover but it could have made that proverbial 400 mile trip in about 5 months, which isn't all that bad. I do believe it would have cost more overall, which is why they didn't do it this way. I would imagine trying to ford a river with Big Muskie would have been very exciting indeed.