Blaine Bridge - Located on Historic National Road in Blaine, off I-70 between Exits 220 & 225.  (You must go under the present day Rt. 40/National Road at the bottom of Blaine Hill to view the bridge.) This 1828 bridge has been designated Ohio's Bicentennial Bridge.  It is the oldest bridge in Ohio, the longest and last "S" three-arch stone bridge on the entire National Road.