If you take IDOT up on its offer, it would be a costly thing to own. To even have a shot at taking over the bridge, applicants would have to prove they forever could maintain both the bridge and the features that give it historic significance. If they choose to move it, they also need to show how and when they would do it. And that might be pretty tough: The structure is crumbling and would be nearly impossible to move, according to IDOT officials.