»A tale of two bridges

One bridge that traverses a forbidding boundary, and another bridge that joins two cities so close they are known as the Twin Cities.

About the latter, failed bridge, the National Bridge Inventory reports: "Superstructure Condition: Poor." and "Bridge Sufficiency Rating: 50%". And the Minnesota Department of Transportation says, "... this bridge is considered to be a non-redundant structure. ... A key factor is that there are only four pylons holding up the arch. Any damage to any one pylon would be catastropic." Compare to the Silver Bridge across the Ohio, which failed spectacularly as a result of its single point of failure.