Ohio State Route 73

Points of interest

• Great Miami River - Middletown, Franklin
• Excello Locks - Historic Remains of a lock on the Miami-Erie Canal near the intersection of 73 and S. Main St. in Middletown, Ohio. Much of the route between Trenton and Franklin follows the original path of the Miami and Erie Canal.
• Middletown Historical Society Canal Museum
• La Comedia Dinner Theatre - Springboro
• Little Miami River - Waynesville
• Little Miami Bike Trail - Corwin
• Caesar Creek Lake - Warren County
• Caesar Creek State Park - Warren, Clinton County
• Serpent Mound
• Brush Creek State Forest
• Shawnee State Forest
• Scioto River
• Ohio River

  History

• 1924 – Original route established; originally routed from Franklin to west of Portsmouth.
• 1926 – Extended to east of Middletown along the previous State Route 6; State Route 104 certification removed.
• March 9, 1932 – Extended to the U.S. Route 127 about northwest of Seven Mile.
• 1936 – Extended to Oxford.
• 1952 – Dually certified with State Route 104 from north of Coles Park to west of Portsmouth.
• 1957 – From Excello to Franklin upgraded to 4 lanes.
• 1962 – From north of West Portsmouth to west of Portsmouth upgraded to 4 lanes.
• 1966 – From Franklin to Interstate 75 upgraded to 4 lanes.
• 1972 – Extended to Portsmouth along the former alignment of U.S. Route 23.
• 1979 – From Interstate 75 to Springboro upgraded to divided highway.
• 1980 – From Trenton to Excello upgraded to divided highway.
• 2011 – Realigned around Wilmington along a new bypass.

  Major junctions