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Main project area hydrologic conditions <br />Groundwater <br />19 <br />Groundwater data in the Gold Run drainage are collected from three monitoring wells in <br />the underlying granite: GRWM-1, GRMW-2, and GRMW-3. Current monitoring well <br />locations are. shown on Figure 3.1. The period of record, water quality statistics, water <br />level and field parameter data summaries have been compiled for monitoring wells <br />GRMW-1A, GRMW-2A, and GRMW-3A, and are provided in Tables A29 through A31 <br />(Attachment A), respectively. Groundwater levels in GRMW-1A vary from 144.0 to 149.3 <br />feet bgl. Groundwater levels in GRMW-2A vary from 54.1 to 76.74.2 feet bgl. <br />.Groundwater levels in GRMW-3A vary from 139.2 to 158.8 feet bgl. <br />Groundwater samples from GRMW-1A and GRMW-3A are characterized as calcium- <br />sulfate-bicarbonate waters. Groundwater from GRMW-2A is characterized as calcium- <br />sulfate water. A piper plot (Figure 3.9) shows the major ion water chemistry for the Gold <br />Run groundwater monitoring wells. Data show average field pH values of 6.9 su, 7.0 su, <br />and 7.4 su in GRMW-1A, GRMW-2A, and GRMW-3A, respectively. Data show average <br />nitrate values of 0.03 mg/L in GRMW-1A, GRMW-2A, and GRMW-3A. Data show <br />average sulfate values in of 707 mg/L, 1,723 mg/L, and 184 mg/L in GRMW-1A, <br />GRMW-2A, and GRMW-3A, respectively. <br /> <br />• <br />2736 Cripple Creek & Victor Gold Mining Company <br />Water Management Consultants <br />