What is this

Probably Northern water snake (Nerodia sipedon)

i thin it is a rat snake of some sort

either a water snake or black racer if u had a closer pic i could tell better

Iagree with the first ithink this animal is some form of melanstic water snake real dark to retain heat, some snakes do this and some don't but i think this snake is a melanstic version of the northern water snake