http://img828.imageshack.us/img828/8501/ramp002.pngThat's underneath. The plan, I think, is to have the long, 3x corridor to be a death trap basically in the long haul. The 2x corridor on the inside of it will be for marksdwarfs, though I've no clue how to make it possible to safely shoot into the larger hallway from it underground yet. I'll also have the inside of the 2x corridor as a barracks/training room and hospital. But for now, it'll be a temporary meeting hall/bedroom. I'll probably put my trade depot near the barracks, on the outside of the 3x hallway. I'll go down one more floor I think to make a crafting/stockpile area. Go down one more to create a hallway towards the river and figure a way to drain the river down Z levels to make wells near to the 3x3 stairway I'm planning on making so every dwarf doesn't have to go far to get drinking water at least.
For that, would I just dig down however levels I want the wells in a safe spot, then break into the river to fill it up?
So many thoughts going through my head that I just don't know how to properly execute! lol
Edit: I just thought of something! How will I keep this ramp down tunnel entrance from flooding from simple rain?