Tennessee Code Title 54. Highways, Bridges and Ferries § 54-10-105

(a) Any county legislative body, a majority of the members assenting, may elect or appoint three (3) commissioners authorized to employ engineers and other necessary and expert service to survey, inspect, and classify all roads that have already been laid off or accepted by the county as public roads, and make maps and charts of the roads, showing the changes and improvements that public interest requires to be made on the roads.

(b) The employed personnel and necessary and expert service may also survey, inspect, lay off, and classify any new road or roads, or extension of old roads that, in the opinion of the commission, the public welfare requires to be opened or extended.

(c) The improvements authorized by this section include grading, filling, extending, metaling, ditching, widening, bridging, draining and ditching, piping, sewering, and crossings of roads, as well as all necessary material required in the construction of the road, roads, and crossings.

(d) The commission shall ascertain and report in detail the probable or approximate cost of making the improvements, together with the probable damages that will be done to adjacent lands by the changes.