About 18 inches in total length.
Photo taken 3 April 2009 at 12:17pm at Grand Bay Wildlife Management Area outside of Valdosta, Georgia, USA, in Lowndes County.
Photo is taken looking into water.
I haven't been paying any attention to salamanders, because I haven't been finding any. Probably I'm not looking in the right places or at the right times.
I found this one because it was being swept across a "road" during high water.
The external gills (the bush-like things on the side of the head) indicate that it is a Siren (rather than a Congo Eel). And the gold specks indicate that it is a Greater Siren, rather than a Lesser Siren or a Dwarf Siren.
Correction or confirmation of my id would be appreciated.
(update: identification was confirmed in the close-up shot)
I used Amphibians and Reptiles of Georgia by Jensen, Camp, Gibbons, and Elliot for my identification.
The greater siren (Siren lacertina) is an eel-like amphibian. The largest of the sirens and one of the largest amphibians in North America, they measure around 1.5 cm (0.59 in) in length upon hatching and then grow to lengths ranging from 18 to 97 cm (7.1 to 38 in). Weight can range from 55 to 1,000 g (1.9 to 35 oz). They range in color from black to brown, and have lighter gray or yellow underbellies.