Section 41-3-901 - Definitions(a) As used in this act, unless the context plainly otherwise requires: (i) "Person" means a natural person, partnership, association, corporation, municipality, irrigation district, the state of Wyoming, any agency or political subdivision thereof, and the United States or any agency thereof; (ii) "Underground water" means any water, including hot water and geothermal steam, under the surface of the land or the bed of any stream, lake, reservoir, or other body of surface water, including water that has been exposed to the surface by an excavation such as a pit; (iii) "Aquifer" means any underground geological structure or formation having boundaries that may be ascertained or reasonably inferred, in which water stands, flows or percolates; (iv) "Well" means any artificial opening or excavation in the ground, however made, by which underground water is sought or through which it flows under natural pressure or is artificially withdrawn, and a series of wells developed as a unit and pumped collectively by a single pumping unit shall be considered as one (1) well; (v) "Construction" of a well includes boring, drilling, jetting, digging or excavating, and installing casing, pump and other devices for withdrawing or facilitating the withdrawal of underground water, or measuring the depth to the water table or the flow of the well; (vi) "Pollution" of underground water means any impairment of the natural quality of such water, however caused, including impairment by salines, minerals, industrial wastes, domestic wastes or sewage, whether indrafted directly or through infiltration into the underground water supply; (vii) "Additional supply" means underground water for irrigation use which is appurtenant to lands that have a direct flow supply of surface water or have an original supply from another underground water source. The limit of use of additional supply is beneficial use; (viii) "Hydrothermal system" means a groundwater system, including cold water recharge and transmission and warm and hot water discharge; (ix) "Hydrothermal feature" means a surface manifestation of a hydrothermal system, including, but not limited to, hot springs, geysers, mud pots and fumaroles.