This cache is not at the posted coordinates, there's no reason to go there.
Our neighbor to the northeast, the state of Nebraska, has a certain system for organizing the registration of certain everyday machines that Colorado doesn't have. Your task is to figure out what this is and solve the puzzle below! You will likely have to do a little research unless you happen to be familiar with this system already. Good luck to you! As an optional bonus, tell me in your logs if you learned anything about Nebraska geography!
North: Cheyenne Gage, Buffalo . Custer, Gosper
West: Platte, Custer Merrick . Saunders, Colfax
If you're having issues with the solution checker, let me know. I haven't set one up before this.