k1ayman: This cache was hidden over 10 years ago, long before the park added the rails (assumably to prevent erosion under the bridge). As such, I am officially archiving this cache, but the troll will remain [;)]
Always sad to see one go, especially one of my first hides. Thanks to everyone who endured the GZ to make the find.
Fun fact: There have been 2 cache containers at GZ for several years now (because one time I couldn't find the original during a check up). Both were placed strategically to mimic one of the bridge's bolts. I wonder which one you found!