In May of 2021, inspectors on the I40 Mississippi River Bridge near Memphis, Tennessee discovered a major crack in a structural member. They immediately contacted emergency managers to shut down this key crossing to vehicle traffic above and maritime traffic below. This video provides a summary of the event, including a discussion on arch bridges, fatigue in steel members, and national bridge inspection standards.

Errata:
(1) 8:38 "at minimum, an arm's length away" should be "at maximum, an arm's length away"
(2) 1:14 New Madrid is usually pronounced MAdrid, not maDRID.
(3) 4:55 ”It’s hard to understate the severity” should be “overstate”

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This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All nonlicensed clips are used for fair use commentary, criticism, and educational purposes.

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