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1 <br />occurring in the downstream station on Middle Creek (Site 29). The spring <br />runoff conductivity at Site 29 has increased from 400 mmhos/cm to 1200 <br />mmhos/cm. Also the irrigation season level has increased from approximately <br />1500 mmhos/cm to approximately 2000 mmhos/cm. This increase is probably <br />more due to upstream mining activities than to the effects of Mine No. 3. <br />' Other than increased levels of sodium, sulphate, and SAR in the stream ho <br />other significant water quality impacts due to mining have been detected. <br />The increase in SAR levels during irrigation season is not sufficient to <br />' rause material damage. <br /> <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br />1 <br /> <br /> <br />1 <br /> <br />- 5 - <br />