Not a bad map. Design isn't too spectacular, but it's well built. Looks and feels like Hoover Dam to some extent.
I would definitely like to see more sniping areas and perhaps more thought put into the inside of the dam like corridors, rooms, and maybe some stairwells or an elevator. There are a lot of secrets littered throughout the map, but they kinda seem a little counterintuitive and hard to access/find. A little touching up with lighting and texturing can go a long way with this as well.
Nice work overall.