Wyo. Stat. § 41-4-317
At the first regular meeting of the board of control after the completion of such measurement by the state engineer, and the return of said evidence by said division superintendent, it shall be the duty of the board of control to make and cause to be entered of record in its office, an order determining and establishing the several priorities of right to the use of waters of said stream, and the amounts of appropriations of the several persons claiming water from such stream, and the character and kind of use for which said appropriation shall be found to have been made. Each appropriation shall be determined in its priority and amount, by the time by which it shall have been made, and the amount of water which shall have been supplied for beneficial purposes; provided, that such appropriator shall at no time be entitled to the use of more water than he can make a beneficial application of on lands, for the benefit of which the appropriation may have been secured, and the amount of any appropriation made by reason of an enlargement of distributing works, shall be determined in like manner; provided, that no allotment for the direct use of the natural unstored flow of any stream shall exceed one (1) cubic foot per second for each seventy (70) acres of land for which said appropriation shall be made, and provided, further, where there may be in any stream water in excess of the total amount of all appropriations from said stream, such excess shall be divided among the appropriators therefrom in proportion to the acreage covered by their respective permits, and provided, also, that such additional water shall be beneficially used, except as hereinafter provided.
W.S. 41-4-317