§ 41-12-202 — Definitions

(a) As used in this compact:
(i) The term "Belle Fourche River" shall mean and
include the Belle Fourche River and all its tributaries
originating in Wyoming;
(ii) The term "basin" shall mean that area in South
Dakota and Wyoming which is naturally drained by the Belle
Fourche River, and all its tributaries;
(iii) The term "beneficial use" is herein defined to
be that use by which the water supply of a drainage basin is
depleted when usefully employed by the activities of man, and
includes water lost by evaporation, and other natural causes
from streams, canals, ditches, irrigated areas, and reservoirs;
(iv) Where the name of the state or the term "state"
or "states" is used, these shall be construed to include any
person or entity of any nature whatsoever using, claiming, or in
any manner asserting any right to the use of the waters of the
Belle Fourche River under the authority of that state.