Dust blowing from right go left off of Arizona 1 mine site onto land north of the site. Fence marks boundary between mine on the left and range land. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
Thunderstorm approaching Arizona 1 Mine. Photo credit: Jo Ellen Hinck , USGS .
Containment pond at Arizona 1, July 2015. Waste rock piles are in the background. Photo credit: Jo Ellen Hinck , USGS .
Small mammal trapping area at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Burrow activity outside the fenced perimeter at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Containment pond with some emergent vegetation at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Cinnamon teals along the containment pond liner at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Containment pond. Photo credit: Jo Ellen Hinck , USGS .
Mexican spadefoot toad (Spea multiplicata).
Acoustic sampler. Photo credit: Jo Ellen Hinck , USGS .
USGS scientists Ernie Valdez and Greg Linder installing a bat acoustic monitor. Photo credit: Jo Ellen Hinck , USGS .
Bethel College researchers placing a gopher trap near a passive dust sampler. Photo credit: Jo Ellen Hinck , USGS .
USGS scientist during soil sampling with dust plume blowing across the Arizona 1 mine in the background. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
Dust blowing off Arizona 1 Mine, not pictured to the right, onto range land on the left. Single track of two track road and water sprayer for scale. . June 2014. Photo credit: K. Walton-Day , U. S. Geological Survey .
Fossil feature around Arizona 1 mine. April 2018. Photo credit: Brian Andraski , USGS .
Fossil feature around Arizona 1 mine. April 2018. Photo credit: Brian Andraski , USGS .
Fossil feature around Arizona 1 mine. April 2018. Photo credit: Brian Andraski , USGS .
View to Arizona 1 mine from outside the mine showing headframe, buildings, and underground mine venting structure to the right. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
Aerial view of Arizona 1 Mine. Photo credit: Jon Mason , USGS .
Aerial view of Arizona 1 Mine. Photo credit: Jon Mason , USGS .
Aerial view of Arizona 1 Mine. Photo credit: Jon Mason , USGS .
Aerial view of Arizona 1 Mine. Photo credit: Jon Mason , USGS .
Containment pond at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Thunderstorm approaching the Arizona 1 mine. Photo credit: Jo Ellen Hinck , USGS .
Arizona 1 Mine.
Arizona 1 Mine on standby status. Photo credit: Jo Ellen Hinck , USGS .
Containment pond at Arizona 1 with some emergent vegetation. Photo credit: Jo Ellen Hinck , USGS .
Containment pond at Arizona 1 with some emergent vegetation. Photo credit: Jo Ellen Hinck , USGS .
Waste rock pile at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Waste rock pile at Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Arizona 1 Mine on standby status. Photo credit: Jo Ellen Hinck , USGS .
Passive dust sampler on the bermed perimeter of Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Weather station installed at the AZ1 mine on the Arizona Strip. Photo credit: Mike Duniway , USGS .
Passive dust sampler on the bermed perimeter, April 2015. Vegetation blown into the corner of the fence.. Photo credit: Jo Ellen Hinck , USGS .
USGS scientist collecting soil-surface core sample near Arizona 1 mine. Photo credit: Brian Andraski , USGS .
Passive dust sampler and bat acoustic monitor on the bermed perimeter of Arizona 1. Photo credit: Jo Ellen Hinck , USGS .
Bat acoustic monitor with solar panel placed next to a passive dust sampler on the bermed perimeter of the mine. Photo credit: Jo Ellen Hinck , USGS .
Weather station at Arizona 1 mine. Photo credit: Jo Ellen Hinck , USGS .
USGS scientists collecting shallow soil core. June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
USGS scientists collecting soil samples along dirt road near Arizona 1 mine site. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
USGS scientists carrying 5 gallon buckets and soil sampling tools with Arizona 1 mine headframe, buildings and waste rock piles in the background. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .
USGS scientists collecting soil samples near the Arizona 1 mine site. . June 2014. Photo credit: K. Walton-Day , U.S. Geological Survey .