|Fact Sheet 2005–3148|
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The U.S. Geological Survey recently completed an environmental study of historical mining in the Boulder River watershed, Montana, using the watershed approach. Results of the study have been used by State and Federal agencies to plan and implement cleanup. The watershed approach is based on the premise that contaminated sites that have the most profound effect on water and ecosystem quality within an entire watershed can be identified, characterized, and ranked for cleanup.
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