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US Steel Minntac Tailings Basin

US Steel Minntac Tailings Basin. 1 mile. Observed Average Sulfate Concentration and Mass in Rivers and Seeps. Average Sulfate Mass.

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US Steel Minntac Tailings Basin

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  1. US Steel Minntac Tailings Basin 1 mile

  2. Observed Average Sulfate Concentration and Mass in Rivers and Seeps Average Sulfate Mass • Calculations are based on observations from approximately 2000 to present except for the Dark River Stream which are from 3 measurements from November 2011 to September 2012 • * 545 gpm at conc of 811 mg/L (Flow from Table 6.2 "Simulated Versus Estimated Seep Flow Rates and Groundwater Discharge Rates" - CRA June 2013 Report:) • SCRS = Seepage Collection and Return System

  3. Comparison of Observed Sulfate Mass in Rivers to Basin Seepage Estimates

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