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State ReQ. • VII. Seneca II Permit Renewal (19861 Hvdrolow Information A. Probable Hvdroloaic Consequences In Section III of the Seneca II Mine Permit Application (December, 1980) a ~etPTm+*+~tion of the probable hydrologic oonseques~ of minirxJ was made in accordance with the Regulations of the Colorado Mined Land Reclamation Board for Coal Minirx3 (effective August 30, 1980). Conclusions were based corn data presented in the grand and surface water sections of Tab 7. During the past five years of minir'g, hydrology data have routinely been gathered according to the CMCRD-approved monitoring Program. ~nese data have been ~*~~, intiespreted a~ discussed in Annnaal Hydrology Reports grr~ared by PCC hydrogeologists; the most recent report (1985 AHR) was submitted to the CNII12D in February, 1986. As a result • of these reports, water quantity and quality charges in the hydrologic system at and in the vicinity of the Seneca II Mine have been evaluated car an annual basis since February, 1983. Conclusions drawn frcmt these AHRs indicate that portions of Section III can no longer be considered valid and should be revises. Additional monitoring as described in this section is necessary to better estimate present and predict future consequences of mining. Thus, the following section serves to update and qualify the information originally ~~*~+~ in Section III. 'ihe purpose of this PHC is to evaluate past and to predict future surface and grourrl water quantity and quality impacts to Qas~y and Fish Creeks. In onier to a~lish this goal, historic (past six years) flora and water quality data collected as part of the Sen eca II Mine hydrology monitoring program are presented and d; G.-,_ ~~. Fran these data, changes to the flow arrl quality of water dischazging frcmm the minim ara aa a7d hoa • 7-173 Revised 10/17/94