Arizona enters the Nevada case
Arizona has sided with Nevada in its legal challenge to the Trump administration's proposed reductions in their Colorado River shares, according to reports from multiple outlets. The governor announced the move on Friday, framing it as a defense of her state's entitlements against federal restrictions she considers excessive.[S1][S2][S3][S4][S5][S6]
The interior department unveiled restrictions during the summer that could reduce the volume delivered to the lower basin states — Arizona, California and Nevada — across the coming two years, with the scale depending on how the river fares. Arizona's filing seeks to intervene in the Nevada suit so it can press its own claims.[S1][S6]
Reservoirs at historic lows
Lake Mead and Lake Powell, the river system's principal storage reservoirs, have dropped to levels rarely seen before, a decline attributed to heavy demand and a shifting climate. The states that draw on the waterway reached a deadlock, with upper basin states contending that their downstream neighbors caused the shortfall and ought to absorb the deepest reductions.[S1]
Federal officials stepped in after the states repeatedly failed to meet deadlines for an agreement. The overriding worry is that if reservoir elevations fall far enough, the river would no longer be able to release water downstream — a condition known as deadpool.[S1]
Anger over the upper basin exemption
Wyoming, Colorado, Utah and New Mexico, the upper basin states, were left out of the cutbacks, and that exclusion has drawn fierce criticism from lower basin leaders. Governor Katie Hobbs said in her Friday statement that her state was drawing a line in the sand, arguing that Washington will not make the upper basin answer for the deliveries it owes Arizona and is threatening harsh reductions exceeding what the lower basin's voluntary conservation pact envisions.[S1]
Tom Buschatzke, director of Arizona's water department, explained that the state intervened in Nevada's case at this point so it could protect its legal rights to Colorado River water while still leaving room for a negotiated agreement with California and Nevada that would safeguard the river. A spokesperson for the interior department had no immediate comment when asked about the joint legal action.[S1]
