2015-06-25_REPORT - M1977403HR - Laserfiche WebLink

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Idarado Mining Company 2014/2015 Annual Report Permit Number: M -1977 -403 -HR Anniversary Date: July 1, 2015 Idarado Mining Company (IMC) is implementing remediation and reclamation activities pursuant to the Consent Decree (D. Colorado Civil Action No. 83-C-2385) between the State of Colorado Department of Public Health and Environment (CDPHE), the State of Colorado Office of Attorney General, and IMC. All field reclamation and remediation activities prescribed by the Remedial Action Plan (RAP) have been completed. Monitoring and maintenance of these reclamation and remedial activities are being performed and will continue to be conducted until each of the performance criteria is achieved or modified. Site activities conducted during the anniversary year related to the permit included: 1. Conducting operation and maintenance of the RAP remedial elements where monitoring activities determined that repairs or maintenance were required. All monitoring and maintenance activities were completed according to the specifications and requirements of the RAP. Operation, maintenance and monitoring activities consist of: • Inspecting, cleaning and repairing, as necessary, runoff diversion and conveyance channel systems at the Telluride and Red Mountain tailing piles during the spring and fall seasons; • Performing diversion channel inspections and maintenance, as necessary, following substantial storm events; • Conducting visual inspections of the Telluride and Red Mountain tailing piles, • Conducting and monitoring rodent control on the Telluride and Red Mountain tailing piles; • Completing remediation of bare areas on Telluride Tailing Piles 1-4 and 5/6 according to the approved Bare Area Work Plan for the Idarado Tailing Piles; • Continuing placement of borrow material along the crest of Telluride Tailing Pile 5/6 according to the approved Bare Area Work Plan for the Idarado Tailing Piles; • Managing water from the Red Mountain and Telluride underground mine workings throughout the reporting period in accordance with the RAP provisions, including routine maintenance of the Mill Level infiltration lagoons and rehabilitation and maintenance of the Treasury Tunnel; • Monitoring vegetation cover and density of the Telluride and Red Mountain tailing piles; and, • Performing periodic water quality monitoring according to the schedule and requirements prescribed in the RAP. 2. IMC submitted plans to CDPHE for installation of a passive water treatment system to reduce zinc concentrations in the drainage from the Treasury Tunnel as a measure to further reduce zinc concentrations in Red Mountain Creek, according to the provisions of the RAP. IMC and CDPHE continue to discuss implementation of the passive water treatment system and effluent monitoring requirements. 3. During the 2014 field season, the noxious weed control program continued with inspections and control measures conducted at the Telluride and Red Mountain permit areas according to the