1997-04-24_REVISION - M1977493 - Laserfiche WebLink

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second phase began in late January of 1996 under a self mining program initiated by Climax. This operation was suspended in April of 1996 to allow for spring runoff. The third and final campaign occurred between July and October of 1996. This final effort was completed on October 4 with the removal of the last load of tailing. The ultimate success of this project is considered to have been met through the use of hoe excavation equipment, capable of reaching above and below the working deck, and the use of 6-wheel drive trucks. Total volume of tailing removed amounted to 1,041,300 cubic yards. • Dam Modifications 1. Outlet Facilities Project included the installation of a conduit through the reservoir to facilitate delivery of impounded water. The specifics of this installation were approved through Division of Minerals and Geology and State Engineer review processes. 2. Spillway Improvements This project is currently in the design and approval process with the State Engineer. . Construction is scheduled for July, 1997. 3. 4-Seep Return Modification Modification of the seepage return system has been approved by the Division of Minerals and Geology. The excavation in the crest of 4-Dam at the south abutment was suspended in late 1996 to avoid backfill and compaction of frozen material. Project is scheduled for completion by late June of 1997. An Emergency Preparedness Plan has been submitted and approved for the reservoir as required by the Office of the State Engineer. • Pollution Prevention 1. Robinson Seep Cutoff Wall This wall was constructed as an Environmental Protection Facility to capture and return all groundwater to process above Eagle Park Reservoir. The wall was constructed between September, 1996 and May, 1997. 2. Robinson Seep Surface Water Return System This seep return system has been in place for many years. The system operates to • return surface water seeps at the toe of Robinson Reservoir back to the reservoir. 3