Tennessee Code Title 54. Highways, Bridges and Ferries § 54-11-221

(a) The bridge shall be paid for by a special tax, not to exceed, in any year, the amount of the state tax, to be levied by the county legislative body, annually, on all the taxables of the county.

(b) Nothing in this section shall prevent the county legislative body from paying for the bridge out of any moneys or funds in the county treasury not otherwise appropriated, or by a sale or sales of any stocks or bonds held and owned by the county, and that may be sold or negotiated for the purpose of the payment.