More info: Trains Magazine, Feb. 2003, pp. 84-85.
Anyone have more info on the trusses being in storage? I see railroad stuff stored along Sheridan Avenue south of 10th Street in Michigan City, but those visible from Street View seem to be the old riveted supports for the catenaries. The big Carroll Avenue yard may be another possibility, although I cannot get street views, I see beams or rails piled up in many areas... nothing that looks particularly truss-like though. If it is there, its either hidden, or very neatly dismantled.
Wherever this bridge is being stored it is certainly safer than where it was (Gary is basically Indianas Detroit) as this city has a serious problem.