Thank you for your questions. They're obviously good ones, that I had not thought to specify. 

- [i]When is this set/when did the earthquake take place so that we know the technology level of the time.[/i]
In my mind, the Quakes happened in like 2020. So, the lever of technology would be our own, as of now. 
- [i]Just for flavour, how is the agriculture and land of the settlement?[/i]
The agriculture and land would be very green, sunny with sufficient rain and trees. The settlements are still standing parts of towns that are broken down. The dam is below a mountain, and the two settlements are across from each other on each side of the river. 
- [i]What other areas or groups of interest would there be in the local area or that people would know of?[/i]
This is open, if someone likes to be from a settlement miles off, that's fine by me. In my vision, there are settlements everywhere, but far apart and travelling between is hard and dangerous. 
- [i]Where in the world is the settlement as well as the ethnicities?[/i]
I have specified it to be Europe, which holds a lot of ethnicities so in this case anything is possible. In my mind, I was thinking somewhere in France, maybe?
- [i]What rules would there be? Is gun-carrying permitted? Are guns permitted?[/i]
No guns, except for the guards and hunters. Guards go with engineers up to the dam, and with gardeners to the fields. 
- [i]Did religions survive the 'quakes or have new ones sprouted?[/i]
Everyone is free in this, I think. I do believe that new ones didn't sprout, considering the amount of atheists in the current day and age. 
- [i]What would be the average education level of the typical adult of the camp, also is there a general education or are people raised to carry out a specific job for the future, for example an engineer school or a military academy.[/i]
Good one. There are people doing the jobs that they do. Kids do a sort of general school, learning about The Quakes, about what's outside and general life skills and basics like reading/writing. Then, when they are a certain age, they get to do like a traineeship with one of the professions. I'm still on the fence about being able to choose the profession or not. 

Does this answer your questions?