Actually Orchard Road is still the correct road name for the section between the 2 Buford Dam Roads.  Some of Industrial Park Drive still exists.  The City of Cumming took a section of Industrial Park Drive, renamed it Buford Dam Road and connected it to Castleberry Road.  
Here is a link the City sent me that is supposed to show all of the changes.
https://forsythcoga.maps.arcgis.com/apps/webappviewer/index.html?id=0ba0bbacf6fe4162bbdd360c0b397bb5