The answer whether Roosevelt Island can build a footbridge similar in features to the Ward’s Island Bridge is probably not. But the idea in concept would work. A foot bridge that would include a central section that would raise and lower to let passing vessels pass under it as they journey up and down the West Channel of the East River.
The concept is not new but the height required and cost would be prohibitive. There would also be all sorts of safety concerns and fears that if stuck in a closed position that river traffic would be obstructed.
But the idea is an interesting one and certainly one worth day dreaming about. It would be pretty cool to think of a bridge say across to Carl Shurz Park at 86th Street
For additional pictures of the Wards Island Bridge link HERE to the Bridge and Tunnel Club web page for the bridge. For additional pictures on Flickr link HERE.
[The above photo is from Flickr but I cannot find the citation at the moment].