This is the most paranoid fortress I have ever seen. Didn't we embark in a *calm* biome?
Oh... we could go much, much, more paranoid.... Just imagine.... interrogation rooms... random inspections of all workplaces and living quarters,,, a full airlock system to get in and out of the mountain/eventual caverns complete with fortifications to neutralize any unwanted visitors that manage to get into the lock. An inn completely cut off from the rest of the mountain (with an airlock system for replenishment of food and beverage) that is a complete and total facade hiding our true glory from the world.
Oh.... and don't forget a dooms day device... you know.. in the inevitable likely hood that something terrible does get in we can neutralize it and euthanize the entire population at the same time to preserve the glory of the mountain and our great works for a future expedition from the Mountainhome to reclaim!