Northern Water Snake - Nerodia sipedon
Its dorsum was strongly keeled and was a dark grayish color. It had a pattern of reddish brown bands on its venter. The lighting was pretty hideous and harsh, so this is the best shot that I could get.
Habitat: Resting in a small woodland pond
The northern water snake is a species of large, nonvenomous, common snake in the family Colubridae. The species is native to North America.