The Pegasus Project, season 10.

Besides, I was thinking more of a rear base. The Tor-Selim making me think of a forward operating base, one that is just outside the combat zone and that you can retreat towards if things go sideways.

Mind you, I also think that the Tau'ri never uncovered half of Atlantis' abilities. I can't imagine designing a city that large that didn't have a means of manufacturing. Plus, how is it that they never found any of the armouries? I figure there was a means of manufacturing, hidden armouries and a few other things that needed more than simply the ATA gene to access.