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Summary of Quarterly Hydrological Monitoring <br />Monitoring Activities <br />The following field monitoring activities were performed during the First Quarter 2013 <br />(January through March 2013): <br />• The water level in W -1 was measured and field parameters were collected from <br />PR Spring and DP Spring on March 18, 2013. <br />Whirlwind Treatment Plant <br />During periods when the treatment plant is in operation, mine water from the Whirlwind <br />Mine is pumped to the surface, stored in the untreated water tank, treated and discharged <br />to the middle tributary of Lumsden Creek. Discharge of treated water from the <br />Whirlwind Mine is allowed in accordance with Colorado Discharge Permit System <br />(CDPS) permit number CO- 0047562. Following the December 2009 batch treatment of <br />mine water, collection of mine water for treatment was suspended at the Whirlwind <br />Mine. Since then, mine water has been allowed to accumulate in the mine workings. <br />Refer to Attachment 1 of this report for a summary of mine water treatment. <br />Whirlwind Mine and Packrat Mine <br />The inflow within the Whirlwind Mine decline cannot be measured directly because it <br />occurs over approximately 100 feet of the decline and within the drifts. The water <br />collects in the mine sump, and is subsequently pumped into the untreated water tank on <br />the surface when the mine is operating. Currently inflow is calculated based on the <br />approximate elevation level of accumulated mine water, and the void volume of the <br />workings. <br />The flow rate and field parameters from the Whirlwind Mine water are included in <br />Attachment 2. Analytical data from the previous samples collected from the Whirlwind <br />Mine are summarized in Table 1. <br />Characterization of mine water in the Packrat Mine could not be conducted because the <br />mine is not yet accessible. Attachment 3 of this report is reserved for field data collected <br />from the Packrat Mine at such time that it becomes accessible and is monitored. <br />DP Spring <br />The field parameters were measured at DP Spring on March 18, 2013. The flow is <br />measured by timing the fill rate of a five- gallon bucket. Field parameters from DP Spring <br />were measured in the stock tank located at the spring. The field parameters at DP Spring <br />are consistent with historical records. <br />Previous flow rates and field parameters at DP Spring are summarized in Attachment 4. <br />PR Spring <br />The field parameters were measured at PR Spring on March 18, 2013. The flow is <br />measured by timing the fill rate of a five- gallon bucket. Field parameters from PR Spring <br />1 <br />