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VII. SPRING AND SEEP SURVEY <br />A survey was conducted May 7-14, 1998, to locate springs and seeps which may exist a[ the base of the ridge along <br />Trout Creek from the northern Moffat boundary to the base of Wes[ Ridge. A total of 1 I springs and 15 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. <br />Eleven of the 15 springs exhibited sufficient discharge for flow to be estimated or calculated and Feld parameters <br />measured. Four of [he I S 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 3, SPR 5, SPR 12, and Seep SE 23 had sufficient Flow, singularly or in combination with other springs or seeps, to <br />require additional laboratory water quality sampling in accordance with [he mine's permit. Results of these analyses are <br />provided in Appendix C. <br />VIII. MOFFAT STABILITY MONITORING WELLS <br />Six wells were installed in [he Moffat 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 [he 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 892 <br />well series have been dry since their installation. The s[ra[igraphy into which these wells were completed is believed to have <br />been intersected during the constmction 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, i[ is not anticipated that significant <br />po[entiometric surfaces will develop in the future. <br />During 1998, all of these wells marginally responded to the wet spring conditions. A review of [he data appears to <br />confirm the continued integrity of the aquiclude 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 monumenu were established in the final Moffat pit area during [he fourth <br />quarter of 1997. The purpose of the monuments is to monitor the hillslope for long-tens stability. The three control points <br />were placed to form a large triangle. The reference control point was established along the top of the hillside in undisturbed <br />ground above the final Moffat pi[. The two additional control points (back-sites) were established in undisturbed ground <br />northwest and south of [he reference point. The back-sites were established to verify the location of [he reference point. The <br />monuments were installed in pairs with the first pair, SM-1 and SM-2, established in the lower third of the final pit area. SM- <br />48 <br />