Tenn. Code § 69-5-144
Any drainage district or districts, in addition to the authority that it now has, shall also be authorized to cooperate and contract with persons, firms, associations, partnerships and private corporations, and with other watershed districts, drainage districts, conservation districts, levee districts, counties, cities, quasi- municipalities, utility districts, and other similar corporations or agencies of this state, and with any such districts or agencies organized for similar purposes in any adjoining state, and with other local, state, and federal agencies, including, but not limited to, the Tennessee department of agriculture, the department of environment and conservation, Tennessee Valley authority, corps of army engineers, the secretary of defense, United States department of agriculture, or any other federal agency; to enter into cooperative contracts and agreements with any such districts, corporations or agencies; and to exercise all the powers and receive all benefits relating to watershed districts prescribed in 83 P.L. 566, 68 Stat. 666, or any other act of congress.
T.C.A. § 69-5-144