Last of Six in the "Bridges of Burnt Store Road" series.
This is another preform located at a very small bridge over a sometimes dry water feature. Check the cap for the letter-number combination, to solve the "Bonus Cache." You will need one from each "Bridge Cache" to get the correct coordinates. It contains one of the pieces to the puzzle for the "Bridges of Burnt Store Road Bonus Cache."(GC52ZN7) If you have been to the other 5 bridges (Over Canals), you now have all the parts to the puzzle and are close to the final GZ. Good Luck.
Congratulations WAJ55 for the FTF!!!
Yvxr gur bgure svir oevqtrf.