The Lake Street Bridge connections Lake Street in Minneapolis to Marshall Avenue in St. Paul. This was once a key river crossing in that it carried US-212, the main road between the twin cities. Even though I-94 is now the main highway connection between the two cities, the Lake Street Bridge still sees a large amount of traffic.
The old Lake Street bridge needed to be replaced because it was obsolete. It did not, however, go easily. First, the new bridge had to be completed. When the first arch was being poured, the falsework let go, and the bridge collapsed into the Mississippi River, taking an inspection crew with it. Later, after the new bridge was completed, the old bridge needed to be removed. Crews set up explosives. After pushing the button, and the dust cleared off, the old bridge was still standing. It took a second effort with more explosives to bring the old bridge down a few weeks later.
