Laserfiche WebLink
level fluctuations occur in the fell end vinte r, end range from 0 to 2.45 feet. Maximal <br />• seasonal fluctuations occur in the spring, summer, and fell, and range from 1.27 feet at <br />Veil YYU13 to 8.56 feet at Vell YYU29. Premi ning voter level fluctuations in the Yadge <br />underburden are relatively clight, but some may be attributable to residual effects of <br />eater quality sampling end aquifer testing, especially et Volts YYU28 end 29. <br />Yolf Creek Coal end Underburden Pater Levels. Tvo monitor veils vere installed in July, <br />1990 to monitor voter levels in the Yolf Creek coal (Yell YYC31) end Yolf Creek <br />underburden (Well YYCU37). Exhibit 7.7 shows the locations of these monitor wells. <br />Peter level date for these wells have been collected since August, 1990. Monthly voter <br />level date for these wells ere presented in Appendix 7-2, and veil completion information <br />is given in Appendix 7-7 end summarized in Table 7-2. <br />Ground eater in the Yolf Creek coal unit at Yell YVC37 occurs under confined conditions, <br /> based on voter level date and on one aquifer test conducted at that site in November, <br /> 1990. Yell YYCU37 has been dr y for the period of record, thus it appears that the Yolf <br /> Creek underburden is et least unsaturated if not also unconfined. Peter levels at Yell <br />• YYC31 f <br />59 <br />74 f 62 <br />47 f <br />i <br />h f 61 <br />11 f S <br />l <br /> range <br />rom <br />. <br />eet to . <br />eet, v <br />t en average o <br />. eet. easona <br />water <br />levels at this well are shallowest in the winter and deepest in the spring, possibly <br />indicating a delayed response to spring snowmelt runoff and/or summer rainfall. Seasonal <br />fluctuations ere minimal, being least in the winter and greatest in the fell. Noveve r, <br />there does appear to be a slight general deepening trend since this veil was installed <br />(see Appendix 7-2). <br />Trout Creek Formation Peter Levels. Two veils vere completed in the Trout Creek sandstone <br />aquifer et the Seneca II-Y Mine in November, 1988. The locations of both wells can be <br />found on Exhibit 7-7 (Tab 7) of the Seneca 11-Y permit application package. Well 2017[ is <br />used as the production yell for the Seneca I1-Y Mine, end Yell 200TC functions as an <br />observation well. Pater level readings taken from both veils prior to a short-term <br />aquifer test performed in December, 1988, indicate artesian conditions with a head of <br />approximately 30 feet above ground surface. Floe rates encountered prior to the test <br />averaged five gpm. <br />• No site specific eater level data is available for [he proposed Yoest production veil <br />vh ich viii also be completed in [he Trout Creek sandstone. The location proposed for the <br />Yoast production well is shown on Exhibit 13-2, Sheet 2 of 2, Surface Voter Control Plan <br />27 Revised 03/01/95 <br />