Science for Decision Making on Uranium Mining in Arizona

Regional Studies

Several studies are ongoing at sites and scales beyond that of individual mines. These studies are detailed below.

Grand Canyon Uranium in Groundwater Viewer

Uranium in Groundwater in the Grand Canyon Region

Since 2014, the USGS has planned and conducted scientific investigations to address the uncertainties of potential uranium-mining effects. USGS collects groundwater samples in the Grand Canyon region to understand the current state of groundwater chemistry in the region, to monitor for changes in groundwater chemistry that may be the result of mining activities, and to identify "hot spots" with elevated concentrations and investigate the causes.

The data on uranium concentrations in groundwater samples in the Grand Canyon region is presented in an interactive web map. The map allows users to navigate to different parts of the Grand Canyon region and see for themselves the uranium concentrations in wells and springs that have been sampled in the area.

Grand Canyon Uranium in Groundwater Viewer (snapshot)
Click to open the Grand Canyon Uranium in Groundwater Viewer

News Stories

Uranium in Spring Water North of Grand Canyon Likely Not Related to Nearby Mining Activity
Uranium levels in Pigeon Spring, just north of the Grand Canyon, are likely due to a natural source of uranium and not related to the nearby former Pigeon Mine

Activities

Activities listed below are scientific research studies occurring at this site. Studies within the Grand Canyon region are grouped by theme and each theme has specific tasks (referenced by task number).

The View Activity button below each task will open a separate window with detailed activity information.

Biology

Analyze Ecological Risk of Contaminant Concentrations at Breccia Pipe Uranium Mines

  • GCSP Tasks: 15
  • Status: Completed

 

Cultural Resources: Addressing Tribal Concerns

 

Uranium bioaccumulation in aquatic invertebrates: A comparative study of spring-fed creeks in the Grand Canyon region

  • GCSP Tasks: 17
  • Status: Ongoing

Geology

Analyze the Mineralogy and Chemistry of the Uranium Ores

  • GCSP Tasks: 1 , 2 , 8b
  • Status: Ongoing

 

Build Database of Known Breccia Pipe Uranium Deposits in the Region to Reassess and Refine the Area Permissive for Breccia Pipes

  • GCSP Tasks: 1 , 2 , 4
  • Status: Completed

 

Research on the Genesis of Uranium Deposits—Clues to Defining the Region Where Deposits May Exist

  • GCSP Tasks: 1 , 2 , 4
  • Status: Ongoing

Water

Geochemical Characterization of Groundwater Discharging From Springs North of the Grand Canyon

  • GCSP Tasks: 8a
  • Status: Completed

 

Increasing Understanding of Groundwater Flow in the Grand Canyon Region

  • GCSP Tasks: 10
  • Status: Ongoing

 

Investigating Potential Impacts from Uranium Mining on Grand Canyon Regional Groundwater Resources

 

Investigating Potential Impacts from Uranium Mining on Streams and Rivers in the Grand Canyon Area

  • GCSP Tasks: 5b , 12
  • Status: Ongoing

 

Laboratory Studies to Evaluate Mobility of Ore-Derived Uranium and Trace Metals in Aquifers

  • GCSP Tasks: 6 , 7b , 9
  • Status: Ongoing