U.S. Geological Survey

Determination of Chemical-Constituent Loads
During Base-Flow and Storm-Runoff Conditions
Near Historical Mines in Prospect Gulch,
Upper Animas River Watershed,
Southwestern Colorado

By Laurie Wirt, Kenneth J. Leib, Dana Bove,
M. Alisa Mast, Jonathan B. Evans, and Gregory P. Meeker

U.S. Geological Survey Open-File Report 99-0159

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