Nerodia taxispilota
Definitely, positively, and absolutely not Nerodia taxispilota! I agree with CSC -- most likely a N. sipedon.
This snake is not a brown watersnake--they have square blotches. This is a midland watersnake (Nerodia sipedon).
Lat: 34.57, Long: -83.48
Spotted on May 21, 2011
Submitted on Feb 27, 2012