Deep maintenance Z level

[Glamurio]

Its an interesting idea but what would be the purpose of this deep maintenance other than being a sneaky way to get trough the station ? What is it used for in terms of regular station operation ?

I can think of a few things like a toxic dump where all the chems flushed by station machinery end up. Some kind of waste filtering and recycling place for the station water. Maybe a stinky compost silo. Stuff like this ? Places you don't want to go most of the times but might on occasion need some unclogging or purging.

This is an excellent point. If we start designing an "underground", there's no way we can't factor in above ground things such as disposals and sewage. Barring a rework on how pipes work, perhaps pipes could be obstacles in the underground, and if we're doing a 1x1 mapping, damaging a pipe below ground could damage the pipe above ground? But that's a big if.

Other than that, I kind of envision the underground to be a mix of sewer, dumping ground, maintenance area and belt hell. Maybe a couple creepy crawlies, spiders, ants, roaches. On that end, since there's now hostile entities, it's a risk-reward area, both for maybe quick undetected traversal, but also for the occasional looting spree. I'd assume it should fulfill a simiar role to that of the trench. And most importantly, it should still maintain the "maintenance" feel, it should be radiation immune, there should be multiple access points, and lots of goodies and random things strewn about.