While initially my plans for Kalijamite were to make it a Yosemite-like national park, some new considerations made me reconsider this plan (particularly inspired by some suggestions by Alessa).
Notably, the fact that a large impact like this often has some very interesting effects on the local area's ore deposits. Take for example the Sudbury Basin, where large amounts of ores were ejected out from below the earth. This has made Sudbury one of the world's largest mining centers.
I feel like this would allow for a lot more expansion on the area itself, since mining towns could erupt around the coastal mountain range. This could be a very economically important area.
I'm not sure what to do, but I'll give this more thought. Suggestions are welcome.