Wisconsin is monitoring bridges with sensor technology
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![Inspector's bucket](https://img.apmcdn.org/e4e7a2d5b043b68771b465f9bf79c8e2794560d9/uncropped/00d0bc-20070814-bucket.jpg)
Bridge inspectors hang underneath the John Blatnik high bridge between Duluth and Superior, Wisconsin.
MPR Photo/Bob Kelleher
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