Tenn. Code § 43-34-108
It is not the intent of the general assembly in adopting this chapter to in any way prohibit, restrict, inhibit, or affect municipalities and/or counties in the exercise of the specific powers delegated by title 6, chapter 51; title 13, chapter 3, parts 1, 3 and 4; title 13, chapter 4; title 13, chapter 7, parts 1 and 4; or to allow this to be done pursuant to this chapter. Furthermore, it is not the intent of the general assembly in adopting this chapter to in any way prohibit, restrict, inhibit, or affect any municipality or county in exercising any other power or authority the municipality or county may lawfully exercise, or to allow this to be done pursuant to this chapter. Nor is it the intent of the general assembly in adopting this chapter to affect a county's or municipality's power of eminent domain as provided in title 29, chapter 17, parts 1 and 2, in any way other than as described in § 43-34-106.
T.C.A. § 43-34-108