I used search engine but i didn't find anything related.
I would like to share with you something i noticed when i paused the official trailer where we can see the dam.
http://i.imgur.com/wlm6oY9.jpg
Then, i searched about the other pic of a dam that we had.
http://i.imgur.com/belr8JF.jpg
This is so different!! Multiple dam confirmed?
Or maybe just an update... As we know, it might have some different stages of development...
Here is a pic of LA... Pretty amazing what R* did, all from scratch.

http://farm8.staticf...0f8b69304_k.jpg
Tell me your opinion about the dam's questions!