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Spring S-46 is a developed spring first monitored during the 1979 spring <br />survey. This spring became part of the required monitoring program in <br />2000. It is located immediately below the 005 Pond. The TDS plot <br />indicates an increasing trend with the peak occurring in June 2014. <br />Spring S-47 was first discovered by SCC personal in 1989 and was <br />initially monitored in June 1990. It is a developed spring existing <br />alongside the mine entrance haul road just to the west of the Seneca II - <br />W Meteorological Station. This spring became part of the required <br />monitoring program in 2000. Its TDS plot indicates a slightly increasing <br />trend. The abnormally high TDS concentration in 2016 (3890 mg/1) was <br />followed this year by an observed value more consistent with the <br />historical range, (1570 mg/1). <br />Spring S-50 is the discharge of the french drain that collects water <br />from the W-24 series monitor wells (located below Pond 16A) that failed <br />in 2003. This water was first sampled in September 2005. The W-24 wells <br />were finally abandoned in August 2007. The entire area around this <br />spring was regraded in 2012. Its TDS plot indicates a decreasing trend; <br />with the peak value in 2016, 6500 mg/l, whereas the lowest to date <br />occurred this year, 2040 mg/l. <br />Spring S-7 in an alluvial clearwell located adjacent to Hubberson Gulch. <br />It serves as the non -potable water supply at the Smith ranch. Due to the <br />taste and possible coliform contamination of the spring, bottled water <br />is used for drinking. Sampling at this spring was discontinued in 1990 <br />but was reestablished in 1999 since it is downstream of mining at the <br />Seneca II -W South area. Its TDS plot indicates an increasing trend. <br />The hydrology monitoring program at the Seneca II -W Mine requires a <br />spoil spring survey every year after the spring snowpack runoff. Spoil <br />Spring 1 (WSSPGI, not to be confused with WSPG1) was discovered in 1998 <br />above the NPDES 005 pond (D pit area). It existed approximately 800 feet <br />southeast of Well GW-S2W-14W. Its TDS plot indicates an increasing <br />trend, with the peak occurring this year, 5180 mg/l. <br />21 <br />