037-1 Wyo. Code R. § 1-13
Permission for temporary use of water for such purposes as road construction, well drilling, and other purposes may be obtained from the State Engineer through the procedures set out in the State Engineer's Regulations and Instructions. Also outlined in the State Engineer's Regulations and Instructions, is the procedure to be followed for changing a water use to a different type of use on a temporary basis. However, when an existing right is temporarily changed, the new use can have a marked affect on the return flow to the stream as compared to the return flow resulting from the historic use. For this reason, the hydrographer commissioner or water commissioner must assess the change in return flow, as well as other effects on the stream resulting from the temporary use. He or she must then make adjustments in the amount of water remaining for diversion to insure that there is no adverse affect on other appropriators from the same source of supply.
037-1 Wyo. Code R. § 1-13