Okla. Stat. tit. 11, § 11-37-118: Acquisition of title or interest of land or water in

adjoining states.

For use in connection with the acquisition, establishment,

betterment or expansion, and the maintenance or operation of its

municipal waterworks system, any municipality may acquire title to,

or any lesser interest in, any lands or water rights, or both, in

any state adjoining the State of Oklahoma, which lie within any

watershed from which the municipality obtains, or desires to obtain,

its municipal water supply. The municipality may acquire any

necessary easements or rights-of-way for pipelines to convey water

from such water supply to a point or points within the State of

Oklahoma, over and across lands not within such watershed, if, and

to the extent, and in the manner, permitted by the laws of the

adjoining state.