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2000 Annual Hydrologic Report <br />Page 7 <br /> <br />Impacts <br />The total dissolved solids for the mine discharges calculated with monthly TDS and <br />monthly flow for the Year comes out to be 1 i 6.2 tons for 001, 1183.8 tons for 002 and <br />99.1 tons for 004 fora total of 1399 tons. The following table presents the total TDS <br />discharged from the mine during the three prior years. <br />Outfalls 001, 002 & 004 <br />Water Year 1997 1998 1999 2000 <br />TDS (Tons) 1805 2214 1797 1399 <br />The 2000 TDS discharge represents 0.12% of the 1.2 million tons calculated to be <br />carried by the River. Discharge from the Roadside North Portal, outfal{ 004, has <br />ceased. At the Roadside South Portal, water is expected to perpetually discharge from <br />outfalls 001 and 002. <br />There was no detectable effect of mining on flows in Cottonwood and Rapid Creeks. <br />Mining ceased at the Roadside Portals on December 2, 1999. No further mining from <br />either portal is anticipated in the foreseeable future. <br />Consumptive water use continued to be closely tied to production. Consumptive use <br />will be insignificant in the future because mining and washing of coal has ceased. <br />I~ <br />