The art and cover are obviously fantastic, as one would expect of Jason Sholtis.
This definitely has the kind of low-key creepy vibe that a lot of Appendix N stuff has. I would have said CL Moore until I got to your explanatory note.
This would make a great random hex to drop into a map. The player characters could easily ignore the weirdness or go on. This is all strange enough that I suspect most players will want to poke at things.
I would provide at least one more clue that there's something inside the installation, just so players don't assume the answer is somewhere else and wander off.
Good stuff.