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<br />' VII. SPRING AND SEEP SURVEY <br />' A survey was conducted May 7-14, 1998, to locate springs• and seeps which may exist at the base of the ridge along <br />Trout Creek from the northern Moffat boundary to the base of West Ridge. A total of I I springs and I S seeps were located as <br />' a result of the survey. Appendix C contains a listing of the springs and seeps observed during 1998 and in previous years. All <br />of the springs located during the 1997 and 1998 surveys were located in 2000. <br />' Seven of the I I springs exhibited sufficient discharge for Flow to be estimated or calculated and field parameters <br />measured. Four of the IS seeps also exhibited sufficient discharge for flow to be estimated and field parameters measured. <br />' Flow estimates and field parameters for these springs and seeps are provided in Appendix C. Several of the springs and seeps <br />were sampled as' single units due to their close proximity to each other and their apparent common origin. Springs SPR I, <br />' SPR 4, SPR 5. SPR 6. SPR 7, SPR 16 and SPR 17, and Seeps SE2, SE 23. SE28, and SE29 had sufficient Flow, singularly or <br />in combination with other springs or seeps. to require additional laboratory water quality sampling in accordance with the <br />mine's permit. Results of these analyses are provided in Appendix C. <br />' Vlil. R1OFFATSTABILITY:ti1ONITORING WELLS <br />Six wells were installed in the Aloffat area to monitor ground water levels. A complete discussion of the purpose of <br />' the wells is provided in Section 4.6.9 of the permit document. Elevations of the water in the Moffat wells are shown in Figure <br />36 with the data provided in Appendix D. The 215 and 218 series wells have generally been dry since 1990 while the R92 <br />well series have been dry since their installation. The stratigraphy into which these wells were completed is believed to have <br />' been intersected during the construction of the Moffat sediment pond during the fall of 1989. Consequently, these Formations <br />have been able to drain fairly freely. Due to the draining nature of the formations, it is not anticipated that significant <br />' potentiometric surfaces will develop in the future. <br />During 1998, all of these wells marginally responded to the wet spring conditions. A review of the data appears to <br />' confirm the continued integrity of the ayuiclude between the Wadge seam and Lower Wadge unit and the lack of pore water <br />pressure development in the lower unit. In June 1999, the casings of wells 892 S and 892E degraded sufficiently to preclude <br />' measurements below 7,165 feet. <br />IX. MOFFAT STABILITY MONUMENTS <br />A system of three control points and six monuments were established in the final Moffat pit area during the fourth <br />' quarter of 1997. The purpose of the monuments are to monitor the hillslope for long-term stability. The three control paints <br />were placed io form a large triangle. The reference control point was established along the top of the hillside in undisturbed <br />' ground above the final Moffat pit. The two additional control points (back-sites) were established in undisturbed ground <br />' 48 <br />