Tennessee Code Title 13. Public Planning and Housing § 13-20-209

(1) There exist in municipalities of the state slum, blighted, and deteriorated areas which constitute a serious and growing menace, injurious to the public health, safety, morals and welfare of the residents of the state, and the findings and declarations made in § 13-20-201 with respect to slum and blighted areas are hereby affirmed and restated;

(2) Certain slum, blighted, or deteriorated areas, or portions thereof, may require acquisitions and clearance, as provided in this part, since the prevailing condition of decay may make impracticable the reclamation of the area by conservation or rehabilitation, but other areas or portions thereof may, through the means provided in this part, be susceptible of conservation or rehabilitation in such a manner that the conditions and evils hereinbefore enumerated may be eliminated, remedied or prevented, and, to the extent feasible, salvable slum and blighted areas should be conserved and rehabilitated through voluntary action and the regulatory process; and

(3) All powers conferred by this part are for public uses and purposes for which public money may be expended and such other powers exercised, and the necessity in the public interest for this part is hereby declared as a matter of legislative determination.