This cache is a continuation of a series started by Rusty O. Junk. In the Wherigo cartridge, you pick the state you're solving for and play through the cartridge to get the coordinates to the final. The cartridge can be downloaded here.
In order to claim this cache, you had to select the Ohio option, complete the cartridge, get the final coordinates for this location, and sign the physical log. Failure to complete all the above, especially the signed log part, will void your find and your log will be deleted. Completion of another associated Wherigo cache from the same cartridge does not qualify you to log this cache.