Wyoming Statutes
Wyo. Stat. § 41-3-501 (2026)
Water divisions defined.
✓ current as of May 2026
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(a) The state of Wyoming is hereby divided into four (4)
water divisions, as follows:
(i) Water Division No. 1 shall consist of all lands
within this state, drained by the North Platte River, and the
tributaries of the North Platte River and the South Platte
River, Snake River, (a tributary of Green River) and its
tributaries, and Running Water Creek and its tributaries;
(ii) Water Division No. 2 shall consist of all lands
within this state, drained by the tributaries of the Yellowstone
and Missouri Rivers north of the water shed of the North Platte
River and Running Water Creek, and east of the summit of the Big
Horn Mountains;
(iii) Water Division No. 3 shall consist of all lands
within this state drained by the Big Horn River and its
tributaries, and by Clark's Fork and its tributaries;
(iv) Water Division No. 4 shall consist of all lands
within this state drained by the Green, Bear and Snake Rivers,
and the tributaries thereof; except Snake River, (a tributary of
Green River), and its tributaries.Notes of Decisions
Cited in 2
cases, 1988–1988 · leading case: In Re Rights to Use Water in Big Horn River, 753 P.2d 76 (Wyo. 1988).
In Re Rights to Use Water in Big Horn River, 753 P.2d 76 (Wyo. 1988). “By statutory definition the division also includes the Clark's Fork of the Yellowstone River, § 41-3-501(a)(iii), W.S. 1977, originating in northwestern Park County, which drains much of the northwestern portion of the region.”
State v. Owl Creek Irrigation Dist. Members, 753 P.2d 76 (Wyo. 1988). “By statutory definition the division also includes the Clark’s Fork of the Yellowstone River, § 41-3-501(a)(iii), W.S.1977, originating in northwestern Park County, which drains much of the northwestern portion of the region.”
— Wyo. Stat. § 41-3-501(a)(iii) — 2 cases
In Re Rights to Use Water in Big Horn River, 753 P.2d 76 (Wyo. 1988). “By statutory definition the division also includes the Clark's Fork of the Yellowstone River, § 41-3-501(a)(iii), W.S. 1977, originating in northwestern Park County, which drains much of the northwestern portion of the region.”
State v. Owl Creek Irrigation Dist. Members, 753 P.2d 76 (Wyo. 1988). “By statutory definition the division also includes the Clark’s Fork of the Yellowstone River, § 41-3-501(a)(iii), W.S.1977, originating in northwestern Park County, which drains much of the northwestern portion of the region.”
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