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. Spoil Springs #1 and 2- Both these spoils springs are located above the NPDES 004 pond. <br />Spoils Spring #1 is a large spring that floes directly into the pond, and Spoils Spring #2 <br />is a small spring creek in reclaimed land that floes adjacent to Spoils Spring #1. In <br />May, 1991, Spoils Spring #2 had an EC 25°C of 3,780 umho/cm, a pH of 7.98, and a flow of <br />45.8 gpm. Starting in 1990, this and most other spoil springs were monitored annually in <br />the spring (usually May) instead of during the fall (usually September). <br />Water quality and hydrograph data for Spoils Spring #1 may be found in Appendix E. Review <br />of this hydrograph indicates higher flows the past four years, This is primarily due to <br />the enlargement of the spring with a bac kh oe for the installation of a weir plate by PCC <br />and USGS personnel beginning September 9, 1987. Floe increases may also be attributed to <br />an increase in the spoils recharge area as mining of the Wadge coal seam proceeds to the <br />north. This spring displays a CaMg-S04 type eater. TDS values (see Table 18, Appendix A) <br />have been increasing since spring this began flowing- This is due primarily to an ever <br />~.J <br />increasing recharge area of spoils material as mining progresses. Loner than normal <br />precipitation since 1987 may have also caused an increase in TDS values. <br />. Spoils Springs #3, 4, 5, 7 and 8. These Springs all exist in the Wadge seam mining area <br />in the little Grassy Creek basin. Spoils Springs #3, 4 and 5 were Sampled May 5, 1991. <br />Spoils Spring #3 drains ou[ of an old mine pit, and exhibited a ftou of 28.3 gpm, an EC <br />25°C of 3,940 umho/cm, and a pH of 7.02. Spoils Spring #4 is a spring adjacent to Spoils <br />Spring #3 and exhibited a flow of 18.8 gpm with an EC 25°C of 3,360 umho/cm and a pH of <br />7.85. Spoils Spring #5 issues out of another old mine pit north of Spoils Spring #3. It <br />had a floe of 75.8 gpm, an EC 25°C of 3,400 umhos/cm, and a pH of 7-78. All these springs <br />eventually flow into the Wadge Impoundment via Little Grassy Creek. <br />Spoils Spring #7 was noted in 1986 in the secondary drainage flowing into the Wadge <br />Impoundment (the primary drainage being Little Grassy Creek). It was not flowing when the <br />site was visited in September, 1987, 1988, and 1989, or in April, 1990. On May 14, 1991, <br />no flow was noted at this site; however, further down this drainage (between old Su rf ate <br />Water Site 7 and [he upper reaches of the NPDES 002 pond) a spoil spring was noted and <br />will now be considered as the nee Spoils Spring #7. It had a floe of 51.6 gpm, an EC 25°C <br />of 3,960 umho/cm, and a pH of 6.91. <br />Spoils Spring #8, which is across the road from Spring #2 along the north permit boundary, <br />." was located in 1987. )t is situated in a road ditch that was dry 10 yards upstream of the <br />19 <br />