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Water allocation under state law

Texas v. New Mexico

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 resolve disputes over water rights. Texas...

Montana v. Wyoming

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 River in violation of the Yellowstone...

Kansas v. Nebraska

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 underlying water allocation dispute between Nebraska and...

Pyramid Lake Paiute Tribe of Indians v. Nevada

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 in the Newlands Reclamation Project to the Carson...

Quantitative Settlement Agreement Coordinated Civil Cases

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 among Southern California water agencies....

Central Basin Municipal Water District v. Water Replenishment District of Southern California

A California appellate court affirmed a lower court decision denying a municipal water district's petition challenging a water replenishment district's "water emergency" declaration for California's Central Basin. The water district...

Santa Maria v. Adam

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 cities and water companies in a water...

Five Corners Family Farmers v. State

The Supreme Court of Washington held that state law does not limit the amount of water that can be withdrawn from groundwater for livestock-watering purposes.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 sought a declaration that the...

Quantification Settlement Agreement Cases

A California appellate court reversed and remanded a lower court decision invalidating a settlement agreement between the state and three water and irrigation agencies concerning the intra-state right to water from the Colorado River....

Hillside Memorial Park & Mortuary v. Golden State Water Co.

A California appellate court reversed and remanded a lower court decision denying water districts' motion to amend a 1961 judgment that imposed a "physical solution" on the West Coast groundwater basin. The districts wanted to store...