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February 2000 Monthly Report <br /> Page 2 <br /> Confirmation of completion by CDPHE has been received for two of these projects— <br /> Surface Mill Tailings at Eureka and Ransom Tunnel. Sunnyside has not received <br /> confirmation of completion from CDPHE for the remaining five projects although <br /> Sunnyside submitted completion certifications in October, 1997. <br /> • Sunnyside Mine Pool Mitigation —Alkaline Solution Injection <br /> This project was not active in February of 2000. <br /> The water pool pH, at the American Tunnel bulkhead, was 4.88 and the bulkhead gage <br /> read 420 psi at the end of February. This would indicate the mine pool elevation did not <br /> change or dropped slightly ( it is difficult to read the gage to 1psi or less) since the end of <br /> January. Sunnyside will continue to monitor these parameters to determine if the mine <br /> pool is at physical equilibrium. <br /> "B List" Projects <br /> • Columbus Mine Portals—Mine Waste Dumps <br /> • London Mine Portals—Waste Dumps <br /> Work, permitting or arrangement for access is not planned until it becomes evident that <br /> the work plans for these projects require implementation. <br /> • Mayflower Facility—Upland Hydrological Control <br /> This project was completed in October, 1999 and accepted by DMG as complying with <br /> the Consent Decree work plans and MLR Standards in November, 1999. <br /> • Tailings Pond No. 4 Surface Drainage Modification <br /> This project was completed in November, 1999 and accepted by DMG as complying with <br /> the Consent Decree work plan and MLR Standards. <br /> • Tailings Pond No. 4 Upland Groundwater Diversion <br /> This project was completed in December but due to snow accumulation in the project <br /> area, project inspection by DMG will not be possible until spring. <br />