Sigma Base

[mmartin798]

The only real problem again is government regulations. The inspections and permits for the radiological material in some of the instrumentation, the semi-annual fire inspections and so on will make it quite difficult to keep the secrets.

[.45cultist]

Dragoon, there are lots of limestone tunnels used for storage. These could be "Starnaman" type depots. If you use these or say Sigma has such, have sections "closed due to instability" and sealed off with hidden entrances.

[dragoon500ly]

Sorry that I have been quiet on Sigma Base lately. Managed to get my greedy paws on copies of three geological surveys of my anticipated location. Nothing like obscure 600+ pages of scientific research!

This portion of northwest Missouri is comprised of mostly limestone and shale. There are mentions of numerous small caves with minor tunnel networks. The largest appears to be four caverns interconnected with tunnels and ranging about 0.75---2 kilometers in length and covering an area of roughly 4 hectares.

What is interesting are several comments on areas of shale that are described as "badly decayed", "rotting", and "crumbling". Which suggests areas that may be easier to tunnel. This leaves the question of shoring up any digging operations to insure that local seismic activity does not collapse all of the work. (The proposed site is on the outskirts of the New Madrid Seismic Zone.)

This, of course, leaves several options for a demented PD....