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CM0001467 <br />Climax Mine - Robinson Lake Pump Station Replacement <br />Eagle County 1041 Application Submittal <br />the eastern end of the Robinson Lake dam. Any leakage in this section of pipe will be contained in the • <br />outer pipe and will be directed to the containment pond. In addition, in the event the RLPS pipeline has to <br />be drained, the pipeline will be equipped with a drain to allow water to be drained at a controlled rate and <br />I <br />directed to the containment pond for recirculation to Robinson Lake. <br />Pump station and pipeline construction activities will be conducted in accordance with the Climax Mine <br />Stormwater Management Plan developed in compliance with the General Stormwater Permit for the Site. <br />Erosion and sediment transport will be controlled through the implementation of Best Management <br />Practices (BMPs) during and after construction, including: the installation of engineering controls such as <br />silt fencing or straw bale checks; revegetation of all bare soil areas exposed during construction, unless <br />the disturbed area is intended as a driving surface; the conduct of weekly inspections by Climax <br />personnel; and the proper management of all petroleum products or other potentially hazardous materials <br />used during construction. A supplemental project specific Stormwater Management Plan will be <br />developed for the construction activities associated with the pump station and pipeline that will identify <br />specific erosion control BMPs to be implemented. Erosion control measures will be identified on the Site <br />Plan for the Project, as necessary, and appropriate information regarding these measures will be <br />submitted to Eagle County with subsequent permit applications, as required. <br />Groundwater Quality • <br />Climax has worked closely with the Colorado DRMS to develop an adequate groundwater monitoring <br />program. As documented in reports submitted to the Colorado Water Quality Control Division and <br />information regarding aquifers and hydrogeology contained in the Mining and Reclamation permit, Climax <br />operations as a whole are not expected to adversely affect groundwater systems in the area. Bedrock is <br />predominately Paleozoic sedimentary rock; none of which is classified as being an aquifer. Groundwater <br />transport, if it were to occur within a deep aquifer would be greatly hampered by the high degree of offset <br />faulting which occurs in the area and region and deep groundwater movement is restricted by the bowl- <br />like configuration of the Kokomo Syncline. As described above, shallow seepage is controlled and <br />managed within the process water and water treatment systems of the site. <br />The replacement of the Robinson Lake Pump Station and pipeline will not have a significant effect on <br />groundwater recharge areas and will not impact groundwater quality. Groundwater quality in the vicinity <br />of the Project is monitored through a well installed between the Robinson Lake Dam and the Eagle Park <br />Reservoir. <br />Water Quantity <br />The Robinson Lake Pump Station Replacement Project will not effect water quantity with respect to <br />existing stream flows and reservoir levels outside the site's process water reclaim system. The site's <br />13