Tenn. Code Ann. § 69-5-702

Before entering into any contract for improvements, the board of directors of the improvement district shall cause notice to be given once a week for four (4) consecutive weeks in some newspaper published in the county where the improvement is located, and such additional publication elsewhere as it may direct of the time and place of letting the work of construction of the improvement, and in the notice it shall specify the approximate amount of work to be done in each section, and the time fixed for its commencement and completion.