Mill tailings deposited on the flood plain of Basin Creek in the Boulder River watershed, Montana, 1998. USGS
geologist and U.S. Forest Service engineer are discussing scientific findings of the USGS
Abandoned Mine Lands Initiative and implications for remediation being planned by the U.S. Forest Service for the Buckeye mine and mill tailings.
Reclaimed flood plain and stream channel at former site of the Buckeye mill tailings, 2002. Cleanup efforts conducted in 2000-01 by the USDA Forest Service dramatically reduced erosion of metal-rich tailings into Basin Creek, Montana.
A view of Pinal Creek Valley, Arizona, (circa 1990s) showing mine workings, large waste pile, and encroaching development of Globe, Arizona.
A view of Pinal Creek Valley, Arizona, (circa 1900) showing mine workings and valley floor.
Measuring the water chemistry of Pinal Creek, Arizona, the site of an investigation of the discharge of an acidic groundwater plume to the creek.
Perennial reach of Pinal Creek, Arizona, where water from an acidic plume of groundwater is discharged.
Propane injection test used to quantitatively measure the degassing of dissolved gases from Pinal Creek, Arizona.
View of the setup of a NaCl tracer test that was designed to determine natural attenuation of metals in Pinal Creek, Arizona.
Downstream view of Pinal Creek, Arizona, where a tracer solution was injected into the stream during a tracer test. Water-quality sampling crews can be seen in the distance.
MINIPOINT groundwater sampler used to measure metals attenuation in shallow streambed sediments.
Discharge of treated water from a remediation system designed to treat a plume of acidic groundwater, Pinal Creek, Arizona.
A view of the Arkansas River, Colorado, in which the water chemistry and sediments have been affected by drainage from abandoned mine lands.
Mine dump at St. Kevin Gulch, Colorado, (Upper Arkansas River watershed) the location of USGS
research on the transport of metals in streams impacted by acid mine drainage.