Concord Road Covered Bridge over Nickajack Creek, in south Cobb County, between Mableton and Smyrna, originally built in 1848, by adjoining land owners State Senator John Gann, Martin Ruff, of Ruff's mill, which still stand east of the bridge, and Robert Daniell, of Daniell's Mill, also known as Concord Woolen Mill, the latter being destroyed following the Battle of Ruff's Mill, which took place west of the covered bridge on July 4, 1864. State Senator John Gann's home west of the bridge and the bridge itself were not destroyed when Concord Woolen Mill was destroyed because it had been manufacturing Confederate uniforms.

Over the years the bridge has been repaired and reroofed by Cobb County, which accounts for conflicting dates of construction in brochures and on markers.