Okla. Stat. tit. 69 § 649
The board of county commissioners of each county, by and with the written approval of the Commission, may grant to the United States of America or any irrigation district, conservancy district or water user's association, organized under the laws of the state, the right to close, inundate, destroy, alter or appropriate any county highway in such county in connection with the construction, development, operation or maintenance of any irrigation, reclamation, water conservation and utilization, flood control, military or national defense project, for needful public buildings, or other public projects being constructed, operated, developed or maintained by the United States of America, or any such district or association, upon such terms and conditions and for such consideration as the board of county commissioners may determine to be just and proper. The grant of any such right or rights may include the right to construct irrigation ditches and canals across and along any such highway.
Okla. Stat. tit. 69, § 649