After some research and checking with a friend who is a hunter we believe this is a Fisher. I have never seen one in the wild but it was much larger than a mink. Only got one shot before it disappeared into the weeds.
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Have to correct this post the animal is a Mink. I sent the picture to a local Naturalist who does reports on one of our TV news programs. This was his reply...
Got your photo. That's a mink. Very nice photo! Looks like you were fairly close? Mink and fishers are both in the weasel family, Mustelidae, but the fisher is a good bit larger and normally doesn't spend time in the water. This guy looks like he just emerged from the creek. Mink are typically found around water.
He is going to be using this photo in one of his reports this fall.