Tenn. Code Ann. § 69-5-703: Contracts let to lowest bidders - Rejection of bids and readvertisement

The board of directors shall award contract or contracts for each section of the work to the lowest responsible bidder or bidders for the contract, or it may award the contract as a whole to the lowest responsible bidder, exercising its own discretion as to letting the work as a whole or in sections, and reserving the right to reject any and all bids and readvertise the letting of the work.