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and 670 to 680 mg /1 (2o increase) in July. This site displays a <br />decreasing TDS trend. <br />On Page 7 -247 of the Seneca II Mine Probable Hydrologic Consequences <br />(PHC), predictions were made for the TDS increases to be observed on <br />Fish Creek during the months of June and July due to discharges from the <br />Seneca II Mine. In June, an increase from 421 to 497 mg /1 (18 %) is <br />predicted between SSF11 and SSF13. In July, an increase from 533 to 607 <br />mg /l (13 %) is predicted between SSF11 and SSF13. As stated in the <br />previous paragraph, a 9% increase was observed in June and a 2% increase <br />in July. It appears that the Seneca II Mine has little impact on Fish <br />Creek. Water discharged from the mine is lost to stock ponds, <br />evapotranspiration, and the alluvium as it flows through Twentymile <br />Park. Dissolved solids from mine discharges are diluted during the <br />snowmelt runoff in March and April (prior to the irrigation season) by <br />high stream flows with relatively low TDS concentrations. The natural <br />conditions in Twentymile Park appear to have a much greater impact on <br />the water quality of Fish Creek. <br />Springs. <br />Spoil spring data may be found after the surface water data presented in <br />Appendix D. Spoil spring data provided are water quality data for the <br />past two years, a hydrograph of historic flow measurements and a LOWESS <br />plot of TDS values. <br />- Spoil Spring 9. This spring is located in the area immediately <br />upstream of the 008 Pond. It exhibits a stable TDS trend (SF 0.5), with <br />the peak TDS occurring in 2003. <br />Comparison of Surface Water Quality to Water Use Standards. SCC has <br />compiled a list of surface water standards for agricultural uses (Table <br />10) . This list is composed of CDPHE surface water agricultural use <br />standards ( CDPHE, Reg.31, November 2009). <br />J <br />