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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 at the base of [he ridge along <br />Trout Creek from the northern Moffat boundary to the base of West Ridge. A total of 11 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. <br />Eight of the 15 springs exhibited sufficient discharge for flow to be estimated or calculated and field parameters <br />measured. Three 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-1 and <br />SPR-5 had sufficient flow, singularly or in combination with other springs or seeps, to require additional laboratory water <br />quality sampling in accordance with the mine's permit. Results of these analyses are provided in Appendix C. <br />VIII. MOFFAT STABILITY MONITORING WELLS <br />Six wells were installed in the 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 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 892 <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 [he draining nature of the formations, it is not anticipated that significant <br />po[entiome[ric surfaces will develop in [he 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 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, [he casings of wells 8425 and 892E degraded sufficiently [o preclude <br />measurements below 7,165 feet. <br />47 <br />