Lake Mead is about to sink to a record low level — again.
The Calbuco volcano in southern Chile erupted Wednesday afternoon for the first time in more than four decades, spewing out a plume of ash mor…
It's still not ready to OK Augusta's earlier Rosemont mineral reserve estimates, however.
The outlook is unclear for restarting a study of Benson pumping impacts.
Some urge a delay. Others want growth, say Benson project can't be stopped.
He notes that zoning was approved more than 20 years ago.
Planning commission unanimously backs Villages at Vigneto.
Could the 28,000-home project dry up the lower San Pedro River?
The town is backing a plan to improve the wetlands .
New solar customers would face increase in electric bills under proposal.
Wildlife service had previously disclosed its presence without providing specifics.
Arizona's annual tortoise adoption program is set to begin April 1.
Neighbors are hopeful about landfill remediation, but wary.
If it is listed as endangered, it could mean more restrictions on development.
Will help government decision-makers, farmers, drought scientists and others, experts say.
The region’s weak economy is playing a role, UA expert says.
Tucson residents will get a chance to question experts on climate issues.
Our rainfall's been way above average, but Upper Basin snowpack is lagging.
Future dry spell could last for 50 years, affect Plains, too.
But Upchurch says he isn't running away from the Rosemont Mine issue.
But as the Santa Cruz changes course again, "Lake Marana" is draining.
State certifies that it expects the mine won't violate surface water quality standards.