Operation Big Coon Dog was an investigation by the United States Federal Bureau of Investigation (FBI) and the Internal Revenue Service (IRS) into alleged corruption surrounding the use of federal and state disaster recovery funds by public officials in Buchanan County, Virginia, United States following severe flooding in the town of Hurley in May 2002. The investigation resulted in the criminal conviction of sixteen people, including several public officials and other government employees, on charges of bribery and fraud. It has been called the largest public corruption case in western Virginia in decades and a step towards uncovering a "dark culture of corruption in Buchanan County".