Another Candidate for the Subterranean Beast?

The following is an excerpt of an email sent from Art to Will on 23 May 2014.

Construction of Chrysler Freeway through Black Bottom

I never answered your question about the symbolism of cement combining liquid and solid to become very solid. It definitely works. That's the point for me that it starts to become a loose symbol, where the resonances become too many to enumerate.

I don't know if this ever happens in real life, but I still like the idea of someone being buried in the cement--maybe someone insignificant to the story like a worker (black? white?). But maybe someone significant, like Stan Witkowski himself.

I feel this could be a can of worms worth opening.

If it were a worker, that could have some interesting implications. If it were a black worker, is that somehow emblematic of Detroit in general, or at least of race relations leading up to and after the race riot in 1967?

Concrete is so richly symbolic with its connection to the auto industry, to Henry Ford's vision of a car for everyone, to white flight, to the economic and cultural desertification of Detroit, to the Nietzschean ramifications of a water-based material that becomes sculptural (kind of like an Apollonian power grab).

Other thoughts:

• Detroit's sprawl has created something like a red giant that may someday collapse into a black hole (cf. description of Carlton Farthington in "A Higher Order of Creation (Part 3 of 3)")
• Could this buried character be a yet another candidate for the subterranean beast Farthington encounters? (cf. "What Happens After Iceland?")
• I love this tidbit from the wikipedia entry on Black Bottom: "Historically, this area was the source of the River Savoyard, which was buried as a sewer in 1836" 
• Check out this video about Detroit's "ghost rivers," including the River Savoyard