Laserfiche WebLink
August 1999 Monthly Report <br /> Page 2 <br /> Sunnyside submitted completion certifications in October, 1997. <br /> Included with this report are monitoring results from the Gold Prince and <br /> Longfellow/Koehler projects for August monitoring samples. <br /> • Sunnyside Mine Pool Mitigation —Alkaline Solution Injection <br /> This project was not active in August of 1999 although 0.199 Mgallons of stormwater <br /> were pumped through the Terry Tunnel bulkhead to lower the water level in the Terry <br /> Tunnel settling ponds in order to maintain a no discharge status. This was necessary due <br /> to inflows from a continuous storm pattern in August with little evaporation occurring. <br /> Evaporation and infiltration are normally enough for pond level control. <br /> The water pool pH, at the American Tunnel bulkhead, was 4.85 and the bulkhead gage <br /> read 409 psi at the end of August. This would indicate that a rise in the mine pool <br /> occurred since the end of July(46 feet). Sunnyside will continue to monitor these <br /> parameters. <br /> "B List" Projects <br /> • Columbus Mine Portals—Mine Waste Dumps <br /> • London Mine Portals—Waste Dumps <br /> Work, permitting or arrangement for access are not planned until it becomes evident that <br /> the work plans for these projects require implementation. <br /> • Mayflower Facility—Upland Hydrological Control <br /> During August, the Drainage A interception and diversion portion of this project was <br /> completed and fully operational . Because of the continual precipitation that occurred, <br /> the intercepted water is significantly more than was anticipated for this time of year. <br /> The lined ditch being constructed to carry the intercepted flows from drainages A and B <br /> was extended and nearing completion by month-end. Due to the weather and difficulties <br /> with isolation of the flows in these drainages, this project is taking significantly longer <br /> than anticipated. It appears that with luck it will be completed in September. The flows <br /> intercepted to-date are larger than anticipated but this is probably a result of the weather <br /> conditions. <br />