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[–] Brother_Shamus 0 points 0 points (+0|-0) ago 

This article is pretty light on details, but other similar plans I have seen utilized caves or partially buried berm type dwellings near the crater walls. There is speculation that lava tubes might be accessible near those areas as well and would save having to excavate. The crater in question is too large for a dome to be practical with current technology. Covering a large fissure or canyon might be feasible, as is sometimes suggested for Mars.