Wyo. Stat. § 41-9-502
Any drainage district organized under the provisions of chapter 76, Wyoming Compiled Statutes, 1920, and all acts amendatory thereof or supplementary thereto, through its commissioners, shall have power to enter into contracts with the United States for the construction, operation and maintenance of any drainage or other works authorized to be done under the provisions of said statutes and authorized under any act of congress heretofore or hereafter enacted, providing for or permitting such a contract on the part of the United States, after said contract has been first submitted to the qualified electors of said district at an election held for that purpose, and at which a majority of the qualified electors present and voting has voted in favor of making such a contract.
W.S. 41-9-502