2006-07-03_REPORT - M1977403HR - Laserfiche WebLink

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Idarado Mining Company 2005 Annual Report Permit Number: M-1977-403-HR Anniversazy Date: July 1, 2006 Page 2 removed were imported from outside the permit boundazy, transported to the stockpile site within the permit boundary for final placement and reclamation. As described in attached Technical Memorandum entitled Acid Base Accounting Test Results-Pandora and Liberty Bell Soil Repository prepared by MFG, Inc. (MFG). The attached Technical Memorandum updates the memorandum prepazed in 2005. MFG estimates approximately 77,000 loose cubic yards (lcy) of primazily net neutralizing materials were removed during both the 2004 and 2005 calendar years from the Pandora and Liberty Bell development site. Approximately 37,000 cubic yazds of material was extracted during 2005 from the Liberty Bell azea. It is expected only minimum quantities of similaz materials will be collected in the future from the Pandora and Liberty Bell locations in the future. Upon completion of Liberty Bell removal, the final acid base accounting report was be prepared by MFG and is attached for review by the Division. As summazized in the updated report, 42 acid-base accounting sample collections and analysis was performed on the combined Pandora and Liberty Bell developmental azeas, of these sample collections and analysis only 3 samples had a negative NNP (Pandora sample ID ILD-WP 30-120-60 NNP=-8.11, Liberty Bell sample ID L.B. 600, 25 0-1 NNP=-4.77 and sample ID Liberty Bell Composite #11 NNP=-5.92) Therefore, the mean Pandora NNP was 24.6 tons CaCO3/1000tons with a corresponding median NNP value of 21.6 tons CaCO3/1000 tons and the mean Liberty Bell NNP was 30.7 tons CaCO3/1000 tons with a corresponding median NNP value of 22.8 tons CaCO3/1000 tons. It is believed the materials from both the Pandora and Liberty Bell azeas placed in the repository will be geochemically stable as placed. The stockpile area was recontoured to an approximate 3H:1V contour, seeded and fertilized during the fall 2005 season to stabilize the stockpile materials. It is expected that the updated MFG report relating to the geochemical nature of the materials placed in the stockpile will determine the materials are net- neutralizing in nature and do not require any further specific reclamation type activities. d} Attached with the MFG Technical Memorandum is a revised map for the Telluride repository location, new facility maps will be completed and forwarded once all final reclamation of the repository location is completed. e) During the 2005/2006 winter season IMC reviewed current reclamation obligations as they regazd to the remaining Red Mountain and Pandora facilities and are scheduled to meet with CDMG Durango office staff in the