Duke Energy uses a Harris P25 Phase II system with a TDMA control channel, it is 100% encrypted but does share RID aliases and GPS locations in most areas. This type of system can NOT be picked up by any scanner, however you can use a SDR dongle and software like DSD+FL (paid version), DSD FME and possibly one or two others. Check out the thread below for discussion, and I have attached a list of frequencies for your area.
Noticed Duke energy carrying 900mhz APX 4000s yesterday evening. Has anyone heard of updates coming or a possible system upgrade? Seems silly running APX portables on an analog only Smartzone system.
For Duke Energy you need to look at Charlotte NC for licensee location, as that is where corporate licenses all the radio systems. You can also use the FCC Site search to find towers near you. I did a 40km radius from the Lafayette town system location to make up the list attached above.