Laserfiche WebLink
February 1997 Monthly Report <br /> Page 3 <br /> - Longfellow - Koehler Cont <br /> Test results were received on the red precipitate layer found <br /> in the pond and under the Koehler dump. It appears that this <br /> material has the potential to release zinc to water when <br /> exposed and lower pH. This layer may be pre-mining or at <br /> least a pre-Koehler dump deposit based on the dump materials <br /> position over the layer with no intermixing. <br /> After receipt of the results, it was determined that this <br /> layer should be removed. Excavation and stockpiling for <br /> haulage was started in February. <br /> The time extension request submitted in January for the <br /> Section 404 Permit held for this project was granted and <br /> received from the U.S. Army Corps of Engineers in February. <br /> No samples were taken in February. <br /> - London Mine Portals - Waste Dumps <br /> This is a "B List" project. Therefore, no work, permitting or <br /> arrangement for access is planned until it becomes evident <br /> that the work plan for this project requires implementation. <br /> - Pride of the West Tailings <br /> Status of this site has not changed from the December monthly <br /> report although all information has been submitted to DMG for <br /> approval to place the historic tailings into the permitted <br /> onsite tailings pond. <br /> - Sunnyside Mine Pool Mitigation - Alkaline Solution Injection <br /> During the month of February, this project was inactive with <br /> no alkaline material or water being injected. <br /> The water pool pH at the American Tunnel bulkhead on February <br /> 14, 1997 was 4 .76 and the bulkhead pressure was 245 psi. <br /> Sunnyside will continue to monitor these parameters through <br /> the winter. <br /> - Cement Creek Diversion and Water Treatment <br /> Cement Creek diversion and water treatment was active <br /> continuously through January. The entire flow of Cement Creek <br /> was diverted and treated along with the portal flow from the <br /> American Tunnel. <br />