A county legislative body is empowered, the same being a county purpose, to build, or assist in building, or in obtaining within the corporate limits of a municipal corporation that is the county seat of the county, a toll-free bridge across any river running through and dividing the municipality and county.
Bridges over rivers through county seat towns
Tenn. Code Ann. § 54-11-219, under Bridges.
Tenn. Code Ann. § 54-11-219