Why rent from a German company, rather than Robbins? It's a 9-feet diameter TBM. None of the standard reasonings of import lobby is even relevant here!

https://www.milwaukiereview.com/news/clackamas-county-s-tunnel-boring-machine-clack-a-mole-begins-work/article_63c94534-3c99-53ce-b31f-73b4d4d5c4c5.html