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  1. Sep 21, 2017 · History of Chicago’s underground tunnel system. The Chicago Pedestrian Walkway System works in conjunction with street level paths that connect to almost 50 buildings in the Loop. The longest ...

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  2. Nov 29, 2017 · Mazing for five miles under 40 blocks of The Loop (Chicago’s business district), this network of tunnels connects some of the city’s most famous buildings, including Macy’s, City Hall and ...

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  3. Chicago Pedway. Coordinates: 41°53′03.2″N 87°37′28.7″W. OpenStreetMap map of the Pedway. Sign of the Chicago Pedway. An underground Pedway tunnel. Inside a Pedway bridge between the Ogilvie Transportation Center and 2 North Riverside Plaza. The Chicago Pedway is a network of tunnels, ground-level concourses and bridges in Chicago ...

    • The Pedway System. The most user-friendly layer of Chicago’s underground is the Pedway System. The term “Pedway” is a conjunction word formed from “pedestrian way.”
    • Underground Streets. The most-viewed portion of underground Chicago underground is probably its underground streets, such as Lower Wacker or Lower Michigan.
    • Sewers of Underground Chicago. Underground the streets of Chicago, below the Pedway and below the underground streets, you will find the sewers. While no human should actually want to explore these, it is where our population of 2-3 million rats live.
    • ‘L’ Lines and Abandoned Freight Train Tunnels. Along with the Pedway and the Blue and Red ‘L’ lines sits a set of abandoned freight train tunnels. Constructed in the early 20th-century, these tunnels transported coal and provided underground space for telephone wires.
  4. Oct 5, 2018 · In the mid-1890s vertical lift bridges were developed, pulled up and down from huge counter weights held in towers on one or both sides of it. Down the main drag of the Chicago River, through the middle of the city, there are 10 bridges, mostly trunnion bascule bridges, the first of which opened in 1907. The leaves of the bridge which span the ...

  5. Dec 19, 2019 · St. Charles Air Line Bridge. This one is for the bridge nerds out there. Built in 1919, the St. Charles Air Line Railroad bridge once held the world-record for the longest bascule bridge at 260 ...

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  7. Apr 12, 2017 · The flooding occured in dozens of underground areas in downtown Chicago after a century-old freight tunnel was punctured, causing water from the Chicago River to rush into buildings connected to ...

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