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on Table 2.05.6(3), page 2.05.89. The Probable Hydrological Consequences <br />(PHC) focuses on impacts caused by underground mine dewatering. As that <br />scenario has not occurred yet, the PHC predictions are not yet relevant. <br />However, on page 2.05.88, it is stated "...Pond 002 is heavily affected by <br />high -TDS water from the Seneca II spoils aquifer, and averages nearly <br />4000 mg /1 ". This year, the average TDS at Pond 002 (NPDES2) was 3768 <br />mg /l, and it TDS trend is decreasing (see above) . At Site YSG5 this <br />year, the average TDS was 2150 mg /1. <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 three years, a hydrograph of historic flow measurements and a <br />LOWESS plot of TDS values. <br />- Spoil Springs 1 and 2. Both these spoil springs are located above <br />the NPDES 004 Pond. Spoil Spring 1 is a large spring that was further <br />developed and fitted with a V -notch weir by the USGS on September 8, <br />1987. Its TDS plot indicates a stable trend (SF = 0.5) , with the peak <br />TDS value occurring in 2005. Spoil Spring 2 is a small spring creek on <br />reclaimed land that flows adjacent to Spoil Spring 1. Spoil Spring 2 <br />exhibits a decreasing TDS trend. <br />- Spoil Springs 3, 4, 5, and 7. These springs all exist in the Wadge <br />coal seam mining area in the Little Grassy Creek basin. Spoil Spring 3 <br />drains out of an old backfilled mine pit, and exhibits a decreasing TDS <br />trend. Spoil Spring 4 is a spring creek adjacent to Spoil Spring 3 and <br />exhibits a stable TDS trend. Spoil Spring 5 (also known as the Pecoco <br />Pond) issues out of another old mine pit north of Spoil Spring 3. It <br />displays a decreasing TDS trend. All these springs eventually flow into <br />the Wadge Impoundment via Little Grassy Creek. Spoil Spring 7 existed at <br />the upper end of the Wadge Impoundment until the summer of 2002, when <br />regrading of the pond shoreline buried this spring. A spring reappeared <br />in this area in 2003, and monitoring has resumed. Its TDS plot recently <br />displays a decreasing TDS trend (SF = 0.5). <br />15 <br />