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REP46788
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REP46788
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Last modified
8/25/2016 12:50:08 AM
Creation date
11/27/2007 11:18:04 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980001
IBM Index Class Name
Report
Doc Date
2/20/2000
Doc Name
1999 AHR text and data
Annual Report Year
1999
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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<br />' duplicate). Finally, the duplicate sample value for ortho-phosphate was I IS'Yo of the original value (0.01 I mg/I-original vs. <br />' 0.013 mg/I-duplicate). <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 IS 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 1999. <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 [o 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 /> <br />' Vlll. 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 siratigraphy 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 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 monuments were established in the final Moffat pit area during the fourth <br />' 48 <br />
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