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4) Reclaim the surface expression of the adit if permanent closure is selected by the <br />owner. <br />Anal <br />The plug proposed for the Koehler Tumrel will reduce the unsaturated zone by removing <br />the drain. This will result in minimizing the oxygen available for reaction with the <br />sulfide materials in the area. The hydrological conditions will be restored to an <br />approximation of pre-mining conditions and should improve the water quality in the area. <br />Contin~ency Plans <br />Should the concept of plugs not be practical after engineeriug studies, SGC will consult <br />with DMG for other possible solutions. If an acceptable, cost effective solution can be <br />arrived at, such a system will be installed. <br />Monitorine <br />Additional monitoring for this project is not contemplated. SGC and/or the BOR <br />monitors Mineral Creek at the USGS gaging station (M-34) above the confluence with <br />the Animas River monthly. SGC will collect samples at this monitoring station until <br />released from this requirement. BOR monitoring data will adequately characterize <br />changes to Mineral Creek after SGC is released from this monitoring requirement. <br />Bud et <br />SGC will fund this project up to the total project limits defined in the Joint Petition for <br />Fourth Amendment to Consent Decree to be executed by SGC and the Division. The <br />anticipated level of funding is $200,000, which is believed to be adequate for placement <br />of the plug. SGC will also be funding up to $300,000 for plugging the Mogul IVo.l Level <br />Tunnel but the allocation can be adjusted as long as both projects are completed. The <br />total funding level of $500,000 to complete the two projects is the maximum level of <br />funding committed to by SGC. <br />Description of Land Use <br />This remediation work plan is intended to use Best Management Practices on the site to <br />reduce metal loading to Mineral Creek and to conform with land use policies for the azea. <br />Other than reclamation of the surface expression of the portal, no changes are anticipated <br />that would modify existing suitable land uses. <br />ConsisteneXwith Other Plans <br />The plan is consistent with the Animas River Stakeholders Group's plan to implement <br />Best Management Practice projects in the Upper Animas River Basin to improve water <br />quality and meet Water Quality Standards set as a goal. This property is on the list of <br />projects identified that will need to be implemented to reach those goals. <br />231115 2 pecember 3, 2002 B - 5 <br />