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system includes seven sedimentation ponds (Ponds 005, 006, 009, 015, 016, 016A <br />and 017). A more complete discussion of this system is contained in Section III.C. <br />of this document. <br />Flow and water quality measurements are taken at all sedimentation ponds, in <br />accordance with the Colorado Discharge Permit System permit issued by the <br />Colorado Department of Public Health and Environment, Water Quality Control <br />Division. <br />The permit application contains provisions for ongoing surface water monitoring. <br />The water monitoring plan is detailed in Tab 15. <br />Seneca Coal Company has included a plan for an alternative water supply in the <br />event that local water rights are adversely impacted by mining. The plan is <br />included in Tab 16 of the permit. <br />F. Probable Hydrologic Consequences <br />A determination of the probable hydrologic consequences of the mining and <br />reclamation activities at the Seneca II-W Mine site has been made by the applicant <br />and is found in Tab 17 of the permit application. Pages 1-85 of Tab 17 narrative <br />focus on hydrologic impacts of mining within the original permit area. Pages 86- <br />143 address impacts of mining within the south extension area. This section <br />includes an evaluation of quantity and quality effects on ground and surface water <br />systems and mitigative measures to be taken both during and after mining. <br />The Probable Hydrologic Consequences section of this document is divided into <br />two subsections (Ground Water Effects and Surface Water Effects). The ground <br />water effects section has been updated by inclusion of a II-W South Extension <br />addendum. The surface water effects section has been updated to incorporate the <br />effects of Wadge and Wolf Creek/Sage Creek mining in the south extension area. <br />Ground Water Effects (Original Permit Area) <br />Probable hydrologic consequences to the ground water regime will be minor. <br />Localized effects to the hydrologic system will include: <br />1) the drawdown of ground water, due to pit dewatering, for a few hundred to <br />perhaps 1,000 feet from the pit; <br />2) possibly diminished quantity and quality of water in the Temple Well no. 1; <br />and <br />Seneca II-W Findings Document 41 June 12, 2006 <br />Permit Renewal No. 5 <br />