The Kinzie St Railroad bridge has been raised and unused since 2000, when the Sun-Times moved their printing operations from River North.

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The bridge, also known as the Carroll Ave Bridge, was the longest and heaviest bascule bridge in the world as of the time of its completion in 1908.

In 1852, the bridge that was built at that site was Chicago's first railroad bridge, and also the first railroad bridge to cross the Chicago River. A different bridge in the same location, built in 1879, was the first railroad bridge in the United States made entirely of steel.

At one point, the city hoped to build a light rail in its place.

Update via the Sun-Times' Craig Newman: The Kinzie Street bridge was used by the Sun-Times to access their old headquarters at 401 N Wabash, where the Trump Tower is now.