Federal officials have unveiled a new plan to manage severe Colorado River water shortages, potentially imposing cuts of up to 3 million acre-feet annually on Arizona, California, and Nevada. This framework replaces 2007 guidelines and aims to provide greater flexibility in adapting to climate change. The plan leans heavily on curtailing deliveries from Lake Mead.

Arizona faces the most significant impact, with potential cuts that could devastate the Central Arizona Project. While such extreme reductions are not anticipated in the initial two years, the new guidelines allow for maximum cuts during severe drought. The Bureau of Reclamation's environmental study underpins this plan, which will be adapted every two years.

The proposed reductions are substantial, with Arizona expected to forgo 760,000 acre-feet annually and California 440,000 acre-feet. Nevada's smaller allocation means a lesser reduction volume. The plan sets a 3 million acre-feet maximum cut for the Lower Basin in harsh drought years, impacting downstream users and potentially electricity generation from dams.

While Upper Basin states are not facing mandatory cuts, discussions continue regarding voluntary conservation programs. The new guidelines aim to balance flexibility and predictability for the 40 million people who depend on the Colorado River.