2018-03-09_REPORT - C1981044 (2)

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3.2.2 Springs There is one active spring on the mine site area, known as the No. 1 Strip Pit Discharge, or 1 SP. There are a few other ephemeral springs and local permanent "damp spots" in the area; however, their combined flow is normally less than 5-10 gpm, and therefore are not significant. The ISP Discharge is a CDPS monitoring point (Outfall 022). There is no sediment pond associated with this spring. Spring water runs down a narrow path through a vegetative filter, drops down onto an isolated sand bar, and during the spring discharges directly to the Williams Fork River. The POR discharges for the 1 SP are presented in Figure 19. 2017 discharge data is presented in Figure 20. The site flows sporadically. The discharge typically begins in March during the spring melt, and may be dry by the end of June. 1 SP is typically dry from July through November, and freezes over from December into March. Table 20 provides 2017 data for this site, while Table 20A provides POR data. A plot of POR total dissolved solids for ISP is presented in Figure 21, and POR iron concentrations are presented on Figure 22. Figure 21 indicates TDS concentrations that are consistent with historic concentrations. Figure 22 illustrates the variable nature of total recoverable iron concentrations in 1 SP discharge. Since 2002 there has been slight general upward trend in iron concentrations, however these levels are still within historic ranges seen for this site. We will continue to monitor this trend. 3.2.3 Ponds There was no recorded discharge from any on-site sediment ponds in 2017. 4.0 SUMMARY AND CONCLUSIONS The subject mine site ceased active mining operations in 1995, thus total mined acreage has not changed since then. The mine was subsequently placed in Temporary Cessation in 2001. The TC status ended in the second quarter of 2006, when WFM re -activated full water monitoring activities in anticipation of future re- activation of the mine site, and because a bond release application was also being contemplated for the Utah Tract and Williams Fork Strip Pit portions of the mine property. After the second quarter of 2013, the mine was again placed in TC, as no near future mining activities were anticipated. The site was taken off TC in November 2016 for reclamation and will continue on into 2018. DRMS will be notified of our intensions well in advance. No significant, unpredicted, or adverse environmental impacts were noted during hydrologic monitoring for 2017. All environmental precautions have been taken to a max extent during the reclamation process. BMP are being followed. During 2017 most of the major structures were demolished and removed from site. Final grading is expected to start in 2018. 8