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<br /> <br />In general, the water was all very hard with average TDS values ranging from <br />458 mg/1 to 2,150 mg/1. Sulfate was generally more dominant than <br />bicarbonate. One spring 5-25 had an average TDS value of 26,567 mg/1, which <br />is anomalously high. The applicant has postulated that this may be due to: <br />1) the spring being located at the toe of a landslide (high 7DS values <br />may be a result of more bedrock exposure to physical and chemical <br />weathering processes as water passes through the slide); <br />2) the flow is very low (less than 0.5 g/m); evaporation at the spring <br />would tend to highly concentrate salts in the water; <br />3) the spring may be contaminated by the salt blocks which are located <br />in the area for 1 ivestock use. <br />All but two springs experienced a decline in flow during the course of the <br />summer. Five had dried up by late August, three others flowed less water <br />during base flow and two were flowing at about the same rate in October as in <br />June. <br />Four springs, Olson Spring, S-5, 5-25, and 5-41, are expected to be impacted <br />by mining, one of which, 5-41, feeds a registered stock pond, while Olson <br />Springs is an adjudicated domestic water right. A discussion of this can be <br />found in Section IX -Assessment of Probable Hydrologic Consequences of Mining <br />and Cumulative Hydrologic Impacts. <br />The applicant has implemented an operational monitoring plan. This plan is <br />described in Section V of Tab 7. The monitoring plan was extensively modified <br />by Peabody in 1987. See Appendix C for Stipulations 2 - 4 which were required <br />upon original permit approval. These stipulations were resolved in 1987 and <br />are no longer required. However, the following stipulation is still required; <br />Stipulation No. 5 <br />PEABODY COAL COMPANY WILL SUBMIT AN ANNUAL HYDROLOGIC REPORT TO THE <br />DIYISION FOLLOWING EACH WATER YEAR (OCTOBER 1 TO SEPTEMBER 30). THIS <br />REPORT SHALL INCLUDE ALL OF THE REDUCED AND TABULATED SURFACE AND GROUND <br />WATER DATA COLLECTED DURING THE YEAR. IUJ INTERPRETATION OF THE DATA AND A <br />DISCUSSION OF POSSIBLE TRENDS SHOULD BE INCLUDED IN THE REPORT. THIS <br />REPORT SHALL BE SUBMITTED TO THE DIYISION NO LATER THAN FEBRUARY 28TH OF <br />THE FOLLOWING YEAR. <br />With continued compliance with the above stipulation this operation is in <br />compliance. <br />- 17 - <br />