The cache is NOT located at the posted coordinates. By completing the Barrow County Historic Courthouse Adventure Lab, you will have what you need to solve for the coordinates for this BONUS CACHE.
N 33 AB.CDE
W 083 FG.HIJ
There is a South Dakota state quarter for the FTF. It has another historic place on the back of it, Mount Rushmore.
Be sure to BYOP and place the container back where you found it.
CONGRATULATIONS to poeanne for being the FTF!