As far as we can determine, there is no map of this dividing line in existence as of 2003. This being the case, it was decided to research the Divide in Georgia.
Back in 2012 I used the information at this page to make a set a turn-by-turn directions for following the ECD through Atlanta as close as possible on current roads.
Unfortunately changes in the Google maps algorithm means that the “permalink” I saved no longer works. I will attempt to recreate it in a less-fragile format.