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Spoil Springs 1 and 2. <br />Both these spoil springs are located above the NPDES 004 Pond. Spoil <br />Spring 1 is a large spring that was further developed and fitted with a <br />V -notch weir by the USGS on September 8, 1987. Its TDS plot indicates an <br />increasing trend, with the peak TDS value occurring in 2015. Spoil <br />Spring 2 is a small spring creek on reclaimed land that flows adjacent <br />to Spoil Spring 1. Spoil Spring 2 exhibits a decreasing TDS trend. <br />Monthly sampling began in April 2015 to gather information for bond <br />release. <br />Spoil Springs 3, 4, 5, and 7. <br />These springs all exist in the Wadge coal seam mining area in the Little <br />Grassy Creek basin. Spoil Spring 3 drains out of an old backfilled mine <br />pit, and exhibits a decreasing TDS trend. Spoil Spring 4 is a spring <br />adjacent to Spoil Spring 3 and exhibits a decreasing TDS trend. Spoil <br />Spring 5 (also known as the Pecoco Pond) is issued out of another old <br />mine pit north of Spoil Spring 3. It displays a decreasing TDS trend. <br />All these springs eventually flow into the Wadge Impoundment via Little <br />Grassy Creek. <br />Spoil Spring 7 existed at the upper end of the Wadge Impoundment until <br />the summer of 2002, when regrading of the pond shoreline buried this <br />spring. A spring reappeared in this area in 2003, and monitoring was <br />resumed. This site no longer exists due to the construction of the Lower <br />Sump in the fall f 2011. The TDS plot of previous data disp ays a <br />stable TDS trend. <br />Spoil Springs 6 and 10. <br />These springs exist in the Wolf Creek coal spoils. Spoil Spring 6 exists <br />along the northwest edge of the Wolf Creek pit and exhibits a decreasing <br />TDS trend. Monitoring at Spoil Spring 6 was discontinued in 2015 for two <br />reasons; first, this spring exists in a Phase III Bond Release area that <br />was approved by the CDRMS early in 2015, and second, it is very <br />difficul to access. Spoil Spring 6A monitors tie same drainage <br />downstream where it meets the haul road. Monitoring at 6A is not a PSCM <br />monitoring requirement. This site displays an increasing TDS trend. <br />18 <br />