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Bateman Creek <br />Surface water flow in Bateman Creek is seasonal and generally low. Flow, when it <br />occurs, is typically in the 2 quarter due to snowmelt and runoff. Occasional 3rd and 4 <br />quarter flows due to seasonal rains also are observed or in the 1 quarter due to melting <br />conditions. Median measured (non -zero) flow is 9.5 gpm. Flow data are shown in Figure <br />4 -1. <br />The surface water in Bateman Creek (BCSW) is characterized as calcium - bicarbonate <br />water. Data in Table 4 -5 show the median pH value is circum- neutral at 7.55 SU. Data <br />in Table 4 -5 show the median nitrate and sulfate values are 0.07 mg/L as N and 45.1 <br />mg/L, respectively. Time series plots of selected parameters (pH, nitrate, and sulfate) are <br />provided in Figure 4 -2. <br />Compilation data and statistics for aluminum, manganese, and zinc, which are common <br />geochemical indicators in the Diatreme, for BCSW are provided in Table 4 -5. The water <br />quality data indicate low and relatively stable parameter concentrations for aluminum, <br />manganese, and zinc for BCSW since 1997. Other trace metals are analyzed as part of <br />the monitoring program. Median values for arsenic, cadmium, chromium, copper, lead, <br />mercury, selenium, and silver for BCSW were less than the analytical detection limits. <br />Trace metal data also are provided in Table 4 -5. <br />Wilson Creek (below Bateman Creek and North Fork of Wilson Creek) <br />Surface water flow in Wilson Creek at WCSW -01, below the confluence of Bateman <br />Creek and the North Fork of Wilson Creek, peaks in the 2 quarter due to snowmelt and <br />runoff. Median measured (non -zero) flow is 102.4 gpm. Flow data are shown in Figure <br />4 -1. <br />The surface water in Wilson Creek at WCSW -01 is characterized as calcium - bicarbonate <br />water. Data in Table 4 -6 shows the median pH value is 7.98 SU. Median nitrate and <br />sulfate values are 3.37 mg/L as N and 140 mg /L, respectively. Time series plots of <br />selected parameters (pH, nitrate, and sulfate) are provided in Figure 4 -2. <br />Compilation data and statistics for aluminum, manganese, and zinc, which are common <br />geochemical indicators in the Diatreme, for WCSW -01 are provided in summary Table 4- <br />6. The water quality data indicate low and relatively stable parameter concentrations for <br />aluminum, manganese, and zinc for WCSW -01 since 2000. Other trace metals are <br />analyzed as part of the monitoring program. Median values for arsenic, cadmium, <br />'Cripple Creek & Victor Gold Mining Company <br />Cresson Project Hydrologic Evaluation for Mine Life Extension 2 <br />7 <br />