Along the banks of the St Claire River is a cast iron light house where it doesn't seem one should have been constructed. The reason is simply that it wasn't constructed there, but rather moved to this location after it was decommissioned in 1982. According to Wikipedia the tower's "...weight is 35 tons and with the height of 66 feet (20 m) and a diameter of 14 feet (4.3 m)...."
To log this cache you'll need to visit this transplant and find a plaque with information about it's 1983 dedication to the city. Use the first word from that plaque (in all caps) as the password to log the cache. If you're so inclined, we'd like to read your theory as to how the Coast Gaurd was able to move this large metal structure to this site in your log. We would also love a photo of you and your team at the site but that is not required.
Gur cyndhr vf nggnpurq gb gur yvtugubhfr ba gur fvqr snpvat gur fgerrg
The plaque is attached to the lighthouse on the side facing the street