There are hereby reserved to the United States, with full acquiescence of the people of this state, all rights and powers for the carrying out of the provisions by the United States of the act of congress, entitled, “An act appropriating the receipts from the sale and disposal of public lands in certain states and territories to the construction of irrigation works for the reclamation of arid lands,” approved June seventeenth, nineteen hundred and two, and acts amendatory thereof or supplementary thereto, to the same extent as if this state had remained a territory.