Cowlitz County Coroner Tim Davidson said Thursday the identification was made after Farley's DNA profile was plugged into a national missing persons database.
The Daily News reports Farley was reported missing in April of last year in Kansas. His pickup truck was found in June 2011 at a truck stop at Halsey, Ore. The body was found Dec. 15, 2011, at a bulk terminal on the river.
The death remains under investigation.