
Well, I made an attempt. Hit some problems.
Aquifers. Stone was limited.
Poor living accommodations. Dwarves weren't the happiest.
Food/Alcohol problems. Made too much beer to start. All food was turned to alcohol. Then the dwarves had problems getting food. Tried mass-plant gathering. Eventually, they ran out of alcohol before enough food was grown to produce beer. Tantrum spiral.
I must say though, the most amusing thing in this fortress was when I promoted my woodcutter to Sheriff. Dealing his "beatings" on sleeping dwarves... with a steel battle axe...
Anyway, no way did I get close to an embark screen wide bridge... I didn't even make it halfway across on a 9 tile wide bridge.
Tried to reclaim, but everything I dug out was completely flooded somehow. Decided to abandon the project for now. Another time, perhaps.
http://mkv25.net/dfma/map-7677-bridgeAlso, I found it is amazingly difficult to build support underneath the bridge. Wasn't going to be there for any particular reason. Just to make it look good in 3d images. But I couldn't manage a way to build them in. I'm sure someone else could, with enough screwpumps. But I wouldn't be able to.