Tex. Water Code § 54.235

Any district created by general law or special act of the legislature in existence for at least 10 years which lies within a county that borders on the Gulf of Mexico and that has a population of 190,000 and which has the powers of this chapter and which also has or is authorized to acquire road utility district powers pursuant to Section 54.234, of this code, may contract with the county within which it is located with respect to the ownership, maintenance, and operation of any facilities or improvements which such district is authorized or may be authorized to acquire by purchase, gift, lease, or otherwise, except by condemnation, any and all property or interests in property, whether real, personal, or mixed, tangible or intangible, located inside or outside such county, that are found to be necessary for such improvements or facilities. Such county may enter into contracts with such districts as permitted by this section for any term of years not exceeding 40 for the management and operation of any or all of such property and interests in property on such terms as the commissioners court of such county deems appropriate.