Section 41-3-1001 - Waters stored for instream flows a beneficial use of water; natural stream flows allowed for instream flows(a) The storage of water in any drainage in Wyoming for the purpose of providing a recreational pool or the release of water for instream flows to establish or maintain new or existing fisheries is a beneficial use of water subject to normal stream loss. (b) Unappropriated water flowing in any stream or drainage in Wyoming may be appropriated for instream flows to maintain or improve existing fisheries and declared a beneficial use of water on a case by case basis by the state engineer if such use does not impair or diminish the rights of any other appropriator in Wyoming. (c) Waters used for the purpose of providing instream flows under subsection (a) of this section shall be the minimum flow necessary to establish or maintain fisheries. (d) Waters used for the purpose of providing instream flows under subsection (b) of this section shall be the minimum flow necessary to maintain or improve existing fisheries.