I created this for myself because I didn't want to be harassed by raiders while building a large underground base, and realised that others may find this useful. The colonists are enclosed in the mountain and a rock wall was placed at the entrance to prevent raiders entering the place. The 3 geysers were added since solar power isn't available and the metal increased to a ridiculous amount since afaik acquiring more via trading while underground isn't possible.
Save file: http://www.mediafire.com/download/o8a8skz1cozix22/EdittedMap.7z
(https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-prn2/1465757_3584466306928_1030885550_o.jpg)
Err.. whats the point?
Quote...solar power isn't available..
You can dig alone the edge of mountain, then you will find spots where solar power become available.
Try dig a very long maze, that raiders will starve before they figure out a way into your base.