Ohio State Route 331 is a north-south highway in Northern Belmont County. This runs from Interstate 70 to near Piedmont Lake. OH St Rt 331 passes through the following towns in Belmont County. Bannock Flushing Holloway OH St Rt 331 is multi-plexed in Belmont County. Ohio State Route 149, at Flushing. OH St Rt 331 intersects the following highways in Belmont County. U.S. Rt. 40, near Bannock. Interstate 70, near Bannock. Ohio State Route 149, near Flushing. Ohio State Route 149, at Flushing.