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Mayo and Associates <br />Consultants in Hvdre <br />'110 East l00 North • Lindon, Utah 84042 • (801) 796-0211 • <br /> <br />February 20, 1998 <br />Ms. Susan McCaaaon <br />Mr. David Berry <br />Divisioa of Mmernls sad Geology <br />Ogee of Mmed Land Reclamation <br />1313 Shertttaa Street, litm 215 <br />Deaver, CO 80202 <br />RE: Supplemeat to `Comparison of West 17k Mute fault-discharge water with <br />discharge water from she Edwards Mute portal, Somerset Colorado'. <br />The propose of this memorandum is to compare the d'isehargc tempetture data of the <br />a, West Ellt Mme (VVEI~ fault-discharge wafer with discharge water from the Edwards <br />IKine portal spring. <br />Groundvraters issuing from WEM BEM and 14 SEHG faults and water issuing from the <br />Edwards Mine portal spring have elevated temperautres relative to mesa aaaual air <br />temperature and may be considatd thermal Based on a receady completed study, the <br />source of elevated temperaa>tes of WEM'a fault waters u the elevated gootbermal <br />gradient of the region. <br />The critical issue hat is whether the elevated temperature of fault discharge waters is <br />evidence of hydraulic communication between aorta stored is the NW Panels sealed <br />sump and thermal wale discharging from the Edward Mme portal spring. <br />NW Yaads 9atlcd Sump <br />The NW Panels scaled sump has received appreciable quantities of water from both the <br />B]M and 14 SEHG faults, u well u a minor amount of cools temperature operations <br />water and wlluvial inflows. Maximum rewrded discharge temperatures ofBEM and la <br />SEHG fault waters were 89°F sad 84°F, respectively. However, most measured <br /> <br />