- There are several RV dump stations near Byesville, Ohio for disposing of your black and gray water and filling it up with fresh water.- One option is the Salt Fork State Park Dump Station. It offers a hose for flushing tanks, a trash bin, and waste disposal services.- Another option is the Senecaville Marina Dump Station. It provides fresh water and waste disposal services.- The Guernsey County Fairgrounds also has a dump station available for public use for a fee.- You can also try the Cambridge/Guernsey County Visitors & Convention Bureau Dump Station which provides free dumping facilities for its visitors.