The Minnesota Slip Drawbridge, in Duluth, Minnesota, was built in 1991.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48394718@N00">Randen Pederson</a> from Superior
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/chefranden/2673065176/">Blue Draw Bridge</a>