Tenn. Code § 68-211-908
The authority is authorized and empowered to condemn in its own name any land, rights in land, easements or rights-of-way situated within the territorial limits of the authority which, in the judgment of the board of directors, are necessary for carrying out the purposes for which the authority is created, and such property or interest in such property may be so acquired, whether or not the same is owned or held for public use by persons having the power of eminent domain, or otherwise held or used for public purposes; provided, that such prior public use will not be interfered with by the use to which such property will be put by the authority. Such power of condemnation may be exercised in the manner prescribed by title 29, chapter 16, or in the manner prescribed by any other applicable statute for the exercise of the power of eminent domain.
T.C.A. § 68-211-908