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Field and water quality conditions for VIN -2A and VIN -2B are provided in Tables 4 -10 <br />and 4 -11. Shallow bedrock ground water (VIN -2B) in Vindicator Valley is characterized <br />as calcium- sulfate water. Data in Tables 4 -10 and 4 -11 show a median pH value of 7.16 <br />SU in the shallow bedrock (VIN -2B) and a median pH value of 7.17 SU in the deeper <br />bedrock (VIN -2A). Median nitrate values are <0.05 mg/L as N in the shallow bedrock. <br />Median sulfate values are 701.5 mg /L in the shallow bedrock. Sulfate concentrations are <br />elevated in VIN -2B and showed a slight increase from 2005 to 2007. Sulfate <br />concentrations showed elevated, but stable conditions in 2008 through 2011. Time series <br />plots for pH, nitrate, and sulfate are provided in Figure 4 -6. <br />Compiled data and statistics for aluminum, manganese, and zinc, which are common <br />geochemical indicators in the Diatreme, are provided in Table 4 -11. The water quality <br />data indicate relatively stable and low concentrations for aluminum and zinc at VIN -2B <br />since 2004. Manganese concentrations are elevated and showed a slight increase from <br />2005 to 2008. Manganese concentrations in 2009, 2010, and 2011 have been stable. <br />Other trace metals are analyzed as part of the monitoring program. Median values for <br />arsenic, cadmium, chromium, copper, lead, mercury, selenium, and silver in the ground <br />waters at VIN -2B were less than the analytical detection limits. The median value for <br />nickel was elevated, but at the detection limit. Trace metal data also are provided in <br />Table 4 -11. <br />4.1.4.4 MLE2 Impacts to Ground Waters <br />No impacts are anticipated to the ground water resources in the Vindicator Valley due to <br />MLE2. Water level and overall water quality conditions at VIN -2A and VIN -2B are <br />expected to remain consistent with historic measurements. <br />The ground water levels and water quality conditions in Vindicator Valley will continue <br />to be monitored by VIN -2A and VIN -2B. <br />5.0 CRIPPLE CREEK AND TRIBUTARIES <br />5.1 Poverty Gulch <br />5.1.1 Current Conditions <br />The Poverty Gulch drainage and MLE permit boundary are shown on Figure 2 -1. <br />Poverty Gulch is a west oriented dry drainage that passes through the City of Cripple <br />Creek and intersects with Cripple Creek. <br />'Cripple Creek & Victor Gold Mining Company <br />Cresson Project Hydrologic Evaluation for Mine Life Extension 2 <br />13 <br />