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Drafr West Elk Mine 2005 Annual Hydrology Report 37 °~ „ ~ ~ ~ ;say ~ d ~ . ers° ==- Beater than~Yhat~,prkes~rtted stn tie _CI,7PS~epotts $ase~d oq"itldts~valuecthb flow welghted;maxtmt)pl annualf~a~litixty'(~DS~Joad~f>•om#the,Prodecf~was,,,1,176'tons a3rhtsalso~repie~elatsabouC=dp~tcentgf ~. .,~ tide valueti_sed.tllthe,CHI,S. A~summary°ofithe satiniyy'Jpadirg"frbtnthe~'rolechcompaced~to,ifhe GHIS shrdys shown oil Table"1:1 Table 11 Summary of Salinity Loading in the North Fork of the Gunnison Average Maximum Flow Calculated Scenario Continuous Weighted TDS Annual Salinity Percent of Discharge Rate Concentration Loading CHIS Loading m m tons/ ear WY 2005 t'~ 330 2,107 2,069 6.8% WS'':2005P 2003 CHIS t ~ 5,520 2,500 30,159 - - °~ using wrs vommes lz~ Usipg Getieral'Mine Water Balance~ESlmafes fin) Based on maximum permitted discharge rate No, mining'nduced impacts, to' water quality, oi, flows m tFle'North Fork€ are _anticpated in' Wk' 2006???2 because mine discharges are not expected to increase and the dischazge water quality is expected to remain the same. 5.2 Springs and Seeps MCC routinely monitors 28 springs and seeps, listed in Table 3. Hydrographs of spring and seep flows are presented in Appendix D and the flow and water quality data are in Appendix E. 5.2.1 Impacts to Water Quantity and Quality Spring and seep flows in WY 2005 continued to be below normal compared to historical averages, but were above flows from the previous years of draught. More springs were wet or flowing in WY 2005 than in WY 2004. (Appendix D). Springs that were flowing in WY 2005 but not in WY 2004 include Spring G-3S, Spring G-26A, Spring 15-1, Spring 10-1, Spring 10-2, and Spring 11-2. Seep E-14-1 has been dry for over two years. Two springs (Spring G-lA and Spring G-30) did not flow but were wet in the spring season in WY 2005. These springs apparently have been affected by the wetter climatic conditions occurring in WY 2005. There is no indication that of any changes to spring or seep flows as a result of mining activities. Water quality data from WY 2005 did not indicate changes from baseline conditions for most of • the monitored springs. However the following springs had slightly elevated TDS and\or conductivity values that were also noted in WY2004. Spring 27-1 had a slightly elevated September 2006 HydroGeo, Inc.