Montana v. Wyoming
ELR Citation: 41 ELR 20168 No(s). 137 (U.S. May 2, 2011)
The U.S. Supreme Court held that Wyoming did not violate the Yellowstone River Compact by allowing its pre-1950 water appropriators to increase their net water consumption by improving the efficiency of their irrigation systems. The compact protects beneficial use water rights in existence prio...