Acid-neutralizing potential of igneous bedrocks in the Animas River headwaters, San Juan County, Colorado

Effects of coal-mine discharges on the quality of the Stonycreek River and its tributaries, Somerset and Cambria counties, Pennsylvania

Williams, Donald R.

Geochemistry of batch-extract waters derived from spoil material collected at the Cordero coal mine, Powder River basin, Wyoming

David L. Naftz

The problem of acid mine drainage in the province of Ontario

John R. Hawley

Final close-out report

Delta Engineering (Firm)

Trace metal and acid-volatile sulfide concentrations in sediments from the Forest Queen Wetland near Silverton, Colorado

Mark R. Stanton

Desativação de minas

Adão Benvindo da Luz