There is hereby granted, over all the lands now or hereafter belonging to the State of Nebraska, except school lands held in trust by the Board of Educational Lands and Funds, a right-of-way for ditches, tunnels and telephone and transmission lines necessary to the construction and operation of any irrigation works constructed by authority of the United States; and in all conveyances such right-of-way shall be reserved.
Neb. Rev. Stat. §§ 46-249