The cache is not at the posted coordinance.
The difficulty is high only due to the requirments to complete. To solved this mystery you will have to complete the Adventure Lab's 5 location tour titled "Burkburnett - Sites of the Past". At the completion of each location you'll receive "Secret Codes" to solve the following:
N 34 AB.CDE W 98 ZY.XWV
Enjoy the story behind Burkburnett's Past with the Adventure Lab's tour, then enjoy the latest new additions to this little town. Cantainer had to be changed and is now a bison tube in new spot. Please use STEALTH since this area can be very actived. LOG only so BYOP.
I've added Waypoints for all you old GPS'rs to download for the ALC sites.