The Colorado River’s Lower Basin states published a proposal Wednesday for the watershed’s long-term operations, just hours after their Upper Basin peers unveiled a rival offer — and as ...

The Colorado River Basin is divided into upper and lower portions. It provides water to the Colorado River, a water source that serves 40 million people over seven states in the southwestern ...

Of all the challenges facing the Colorado River, there’s at least one that all stakeholders are working on collaboratively, ...

This work is motivated by and could assist the upcoming renegotiation of the Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead.

Using the 1999 concentration levels, economic studies have identified the cost of damages due to increased salinity levels in the lower Colorado River basin at approximately $330 million dollars per ...

A map showing snow water equivalent in southwestern ... but especially in the [Lower Colorado River Basin]." The Colorado River Basin is at a crossroads as experts closely monitor snowpack and ...

Snowpack in the upper Colorado River ... The water levels in the river’s second largest reservoir, Lake Powell, largely dictate how much water is released to lower basin states like Arizona.

TUCSON, Ariz.— A federal judge on Thursday overturned the U.S. Fish and Wildlife Service’s 2017 withdrawal of a proposed rule to protect the lower Colorado River basin roundtail chub as a threatened ...

RANGE: Near extinction in the lower Colorado River basin; occurs in the upper Colorado River basin in the lower Yampa River, Green River, mainstem Colorado River, and lower San Juan River THREATS: ...