There's a claim in one of the reply threads that they contracted HP to build a replacement years ago, but the project didn't succeed: https://twitter.com/tradel/status/1246526465207869440
While there are problems with lowest-bidder-win, the real issue here is that systems like this are more living and breathing than one-off; you need a teams that tend to them, not bringing in a contractor.
It is, but you can't have any joe schmoe off the street coming in and learn how to pour concrete in a day. This is something that requires practice and problem solving skills. And years of it.
[1] https://www.nbcwashington.com/news/local/major-concrete-issu...