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015). Monitoring of this site commenced in September 1990, The peak <br />flow this year was the lowest observed since 1999. This site displays <br />an increasing TDS trend. <br />The Seneca II-W PHC (revised 3/Ol) predicts an irrigation season average <br />TDS value of 641 mg/1 on Sage Creek, while a value of 690 mg/1 was <br />observed. The 690 mg/1 value observed this year in only BR greater than <br />the predicted value. However, the maximum TDS value observed during the <br />same time frame at NPDES 015 was only 530 mg/1 and NPDES 009 did not <br />discharge this year. The lower than average precipitation observed this <br />year may have also affected TDS values. ~ ~- <br />Springs. Spring data may be found after surface water data in Appendix <br />E. Data provided are a water quality report for the past two years, <br /> historic flow measurements, baseline water quality statistics for <br /> springs downstream of minin g (when available), a LOWESS plot of <br /> electrical conductivities (EC, corrected to <br />25° C, since 10/1/89), and a <br />. hi <br />i <br />tin <br />t <br />li <br />f e <br />t , <br />illie <br />ui <br />nt <br />f ma <br />l <br />i <br />d TDS <br /> or <br />c <br />s <br />g o <br />s rcen <br />p q <br />e <br />jor <br />ons -an <br />m <br />va <br />s o <br />. <br /> Springs with a flow less than 5 gpm (0.011 cfs) are analyzed for field <br /> parameters only. In Appendix E, all native springs have a WSPG prefix <br /> (e.g., Sprinq 5-95 = WSPG45) while all spoil springs have a WSSPG <br /> prefix. <br />Spring S-1 is located in an ephemeral stream channel that is the <br />northern tributary to Sage Creek. Further downstream in this drainage <br />is the 009 Pond that was constructed in October 1991. The EC plot <br />indicates a recently decreasing trend. <br />Spring 5-23 is located at the headwaters of the 006 Gulch, in an <br />ephemeral stream channel. This spring is upstream of proposed mining <br />and should not be affected by mining. The EC plot indicated an <br />increasing trend. <br />Spring 5-41 is located downstream of Spring 5-23 in the 006 Gulch stream <br />channel. It is located just downstream of the silted-in Temple Pond }{2, <br />This spring was buried in spoils in 1998. <br />17 <br />