The Zilwaukee Bridge carries northbound and southbound I-75 125 feet over the Saginaw River at Zilwaukee, MI with a total length of just over 8,000 ft. This high level bridge replaced a drawbridge at the same location that caused major backups on I-75 with frequent openings for ship traffic going from Saginaw, MI to the Great Lakes. With a major and widely publicized construction mishap and huge budget overruns this is one of the more widely know bridges in the State of Michigan.
You can read much more about this star-crossed bridge in Wikipedia’s Zilwaukee Bridge entry, but the best resource is michiganhighways.org. There you can find The Zilwaukee Bridge: From the Beginning by MDOT. This details the whole story including “The Accident“. There’s also a bunch of photos of the bridge including an aerial view and an annotated aerial view.