In January 2011, this historical bridge was dismantled by PA DOT because of age and deterioration. In its place, a small mini-park with an informational kiosk about the bridge.
Check out the area, see how they saved the bridge plaque.
Find out about the bridge over at historicbridges.org
******NOTE*****
There is a letterbox very close to gz. It is NOT the cache.
It is also not a listed letterbox for geocaching.com. Without giving it away, if what you find involves duct tape in any way shape or form, you have not found this cache, you have found the letterbox.