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• Both the Roadside North and South Portals are located on rock outcrop adjacent <br />to the Colorado River. The Roadside North Portal is located north and west of <br />the river, and the Roadside South Portal is located south and east of the river. <br />Mine workings at the Roadside North Portal slope away from the mine portal and <br />away from the river. The Operator pumped water out of the North Portal in order <br />n <br />LJ <br />• <br />to keep ventilation pathways open. Discharges averaged about 80 to 90 gallons <br />per minute (gpm) during 1998 and 1999 with total dissolved solids (TDS) of <br />approximately 1400 to 1500 mg/L. The last discharge from the North Portal <br />occurred during December 1999. The North Portal was sealed during February <br />2000. No further discharges from the North Portal are expected. <br />Some of the water from the Roadside South Portal was pumped out to a surface <br />storage tank. Water from the tank was used in the mine's processing plant. <br />Excess water was discharged into the river at outfall No. 001. Because the , <br />pipeline tended to freeze in the winter months, most of the discharge from outfall <br />No. 001 occured during warm weather. On a yearly basis, flows averages less <br />than 50 gpm with a TDS of approximately 1000 mg/L. <br />In the past, water has been pumped from the Roadside South Portal at the North <br />Decline. The North Decline has been sealed and water is currently (2003) being <br />discharged by gravity flow from the North Decline (outfall No. 016). Long-term <br />discharge from outfall No. 016 is expected to be approximately 200 - 300 gpm, <br />with a TDS of approximately 1500 mg/L. <br />19-7 (5/03) <br />