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8700 <br />8800 <br />WSW <br />8400 <br />0 100 200 300 400 500 800 <br />DISTANCE — FEET <br />NATERAL PROP'ERTES M <br />MATERIAL <br />1rrE <br />MATERIAL <br />OFSCRtvTlOt+ <br />UW WT. (psi) <br />SKEAR SIRE710Tn <br />b <br />a..t <br />u y <br />C <br />UFLSATURATEO TAKINGS <br />105 <br />1 120 <br />30 <br />300 <br />1.22 <br />SATURATED TAAP= <br />105 <br />1 120 <br />Is <br />300 <br />EMBAMKiKNT FILL <br />125 <br />135 <br />35 <br />0 <br />FOl "TIQW SOR. <br />123 <br />135 <br />35 <br />0 <br />700 Boo 900 <br />STARAM ANALYS13 S114YARY <br />FAILURE <br />TYK <br />STATIC <br />FO$ <br />"CODOtSTAT10 <br />FOS• <br />Y10f ACW- <br />(75 p} <br />2.37 <br />1.31 <br />NA <br />MA <br />NA <br />13.2 <br />2.76 <br />1.22 <br />112 <br />2.37 <br />1 1.12 <br />10.6 <br />6.0 <br />1.45 <br />11.3 <br />.VW A99DA RCM ,rw: YM 1COWOUT ] A /@[ADM "Ou or we 'iGOMK COOr`[R1 Cr 0.11s <br />MO 470 00 00,E MR 5.:..M'LD s C$ IM . M OK-Al W AR F.: 2A'Kt <br />8700 <br />8800 <br />1 <br />A< <br />BSOO <br />8100 <br />(Reproduced from SPX, 1995) <br />Figure 5 Results of Downstream Stability Analyses <br />3.1.3 Monitoring Data <br />Monthly monitoring reports were reviewed for available data on the embankment standpipe <br />piezometers. Data indicate the piezometers are dry or have a slight amount of water in the <br />bottom of the casing that could be related to condensation or trapped water in the end cap of the <br />casing. Monitoring data indicate there is no reason to believe there is an elevated phreatic <br />surface above the liner along the axis of the main dam. This would indicate the drain layer <br />above the liner is functioning as intended. As described later, the pipe outlets of the underdrain <br />system had become temporarily blocked by surface sloughing and erosion sediment deposition at <br />the toe of the dam, but the piezometers do not indicate this has resulted in an elevated phreatic <br />surface at the location of the piezometers. The blocked outfalls were cleared (exposed) before <br />the May 13, 2013 inspection. <br />3.2 VISUAL ASSESSMENT OF DAM STABILITY <br />The findings of issues identified in the two 2013 site visits and the ISI are summarized in the <br />following sections. <br />San Luis Project Miller Geotechnical Consultants <br />Tailing Dam Data Report 10 February 2014 <br />