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 filed suit alleging that New Mexico was allowing its residents 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 River in violation of the Yellowstone River Compact. The Compact protects pre-1950 appropriative rights to...

The Ninth Circuit upheld a lower court's dismissal of a tribe's NEPA challenge to a DOI guidance that did not consider its interest when allocating the water rights of the Colorado River. The tribe contended that it was unlawfully excluded from DOI 2001 and 2008 guidances that outlined how water is ...

The D.C. Circuit held that the federal government is not required to reveal the location of water wells under an exemption to FOIA. A environmental group dedicated to protecting the Northern California ecosystem and watersheds filed FOIA requests seeking copies of all documents related to water tran...

A district court granted defendant's motion for summary judgment in a case involving a city utility's suit against an upstream drainage district over excess nitrate pollution in the utility's water source. In a prior decision involving these two entities, the Iowa Supreme court held that drainage di...

The Supreme Court of California held that the state may enter and conduct environmental and geological studies and testing on more than 150 privately owned properties in the Sacramento-San Joaquin Delta that the state might seek to acquire for construction of two new tunnels to deliver fresh water f...

The Ninth Circuit held that Washington state's management of barrier culverts, which allow streams to flow underneath roads, violated various Native American treaties from the 1850s and ordered the state to correct them. The "Stevens Treaties" were entered into in 1854-1855 between Native American t...

The Texas Supreme Court held that the common-law "accommodation doctrine," which gives an oil-and-gas lessee an implied right to use the land as reasonably necessary to produce and remove the minerals as long as it exercises that right with due regard for the landowner's rights, also extends to grou...

The Ninth Circuit, in an unpublished opinion, affirmed in part and reversed in part a lower court decision dismissing fishermen's NEPA claims against the Bureau of Reclamation in connection with its approval of eight interim two-year contracts for delivery of water from the Central Valley Project to...

The Washington Supreme Court held that a local initiative to create a "Community Bill of Rights" which, among other things, would give the Spokane River its own water rights, including the rights to sustainable recharge, sufficient flows to support native fish, and clean water, may not be placed on ...