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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 <br />86-143 address impacts of mining within the south extension area. This <br />section includes an evaluation of quantity and quality effects on ground and surface <br />water 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 <br />the effects of Wadge and Wolf Creek/Sage Creek mining in the south <br />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 />3) the probable dewatering and degradation of quality in three to five springs in <br />the permit area, two of which are used for stock watering purposes; <br />Seneca II-W Findings Document 38 November 17, 2004 <br />Permit Revision No. 4 <br />