From The Courthouse News (Kevin Lessmiller):
The nation’s high court also agreed to take on Texas’ lawsuit against New Mexico and Colorado over the nearly 80-year-old Rio Grande Compact.
The Lone Star State claims New Mexico’s increasing use of water from the Elephant Butte Reservoir deprives it of water apportioned to it under the 1938 deal, which governs the distribution of Rio Grande water among Texas, New Mexico and Colorado.
Dates for oral arguments have not been set in either case, both of which are original-jurisdiction cases, meaning the lawsuits were filed directly with the Supreme Court.