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...