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One site is monitored on Dry Creek, downstream of mining. Flow and field <br />parameters are measured monthly, and water quality samples for the parameters <br />listed in Appendix IS-1 are taken triannually. <br />SCC monitors one site on Sage Creek. Flow and field parameters are recorded <br />monthly upstream, and triannual samples are taken for the parameters listed in <br />Appendix 15-1. <br />SCC monitors one site on a south tributary of Sage Creek. This site, CG1, will be <br />discontinued upon construction of Pond 015 and will be replaced by Colorado <br />Discharge Permit System monitoring. <br />Seneca Coal Company has installed a sediment control system to divert, convey <br />and/or treat surface water runoff in and around the mine site. The sediment control <br />system includes six sedimentation ponds (Ponds 005, 006, 009, 015, 016 and 017). <br />A more complete discussion of this system is contained in Section III.C. of this <br />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 />F. Probable Hydrologic Consequences <br />A determination of the probable hydrologic consequences of the mining and <br />reclamation activities at [he Seneca II-W Mine site has been made by the applicant <br />and is found in Tab 17 of the permit application. This section includes an evaluation <br />of quantity and quality effects on ground and surface water systems and mitigative <br />measures to be taken both during and after minine. <br />The Probable Hydrologic Consequences section of this document is divided into two <br />main subsections: Ground Water Effects and Surface Water Effects. <br />Ground Water Effects <br />Probable hydrologic consequences to the ground water regime will be minor. <br />Localized effects to the hydrologic system will include: <br />Seneca II-W Findings Document 26 June I5, 2t)Ol <br />Permit Renewal No. 3 <br />