This cache is NOT at the posted coordinates.
To find this cache, simply complete the Art in Ballantyne Adventure Lab. In the process of completing the steps for the Adventure Lab, you will be provided details for solving the final coordinates for this bonus cache in the journal enteries of the labs.
You will need to install the "Adventure Labs" app in order to complete the steps in the Art in Ballantyne Adventure Lab.
The final can be found at N 35° 03.EBC' W 80° 50.CAD'