The Ninth Circuit affirmed in part and vacated in part a district court's dismissal of a county's complaint in long-standing litigation over appropriation of water in the Walker River…

The Nevada Supreme Court held that the public trust doctrine did not permit reallocation of water rights already adjudicated and settled under the doctrine of prior appropriation in a lawsuit…

The U.S. Supreme Court held that the United States may pursue claims against New Mexico for violating the Rio Grande Compact, which Colorado, New Mexico, and Texas entered into in the 1930s to…

The U.S. Supreme Court, in an unsigned judgment and decree, ordered Wyoming to pay Montana $20,340 in damages, plus $67,270.87 in costs, for reducing the amount of water available in the Tongue…

The U.S. Supreme Court adopted a Special Master's determination that Nebraska "knowingly failed" to comply with its obligations under a 2002 settlement agreement that resolved an…

The Ninth Circuit affirmed a lower court decision vacating the Nevada state engineer's approval of the state wildlife agency's application to transfer water rights from agricultural land…

A California court validated a settlement agreement and 11 related agreements concerning the conservation, transfer, and exchange of Colorado River water diverted for beneficial consumptive use…

A California appellate court affirmed a lower court decision denying a municipal water district's petition challenging a water replenishment district's "water emergency"…

A California appellate court affirmed in part and reversed in part a lower court decision approving an agreement between landowners, the Santa Maria Valley Water Conservation District, and local…

The Supreme Court of Washington held that state law does not limit the amount of water that can be withdrawn from groundwater for livestock-watering purposes. Local farmers and environmentalists…