If you have a problem with a FedEx Ground package not getting delivered, you can call the terminal directly. The terminal numbers mostly correspond to the first three digits of the ZIP code that they service or are located in. So the terminal in Las Vegas is 891 (89101 is downtown Las Vegas).
Click on a link for the terminal phone number, address, and some other helpful information.
Here is the map link: https://www.google.com/maps/d/edit?mid=zK6_po8VSesY.k0v7584h_nsc&usp=sharing