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Jim Stark <br />Page 4 <br />September 12, 2006 <br />2. According to page 4.05-10 of the existing permit document, Colowyo currently <br />has three groundwater monitoring wells in the approved monitoring plan, A-6 <br />Well & North Goodspring Well (both in Goodspring Creek Alluvium), and the <br />Gossazd Well (north of the loadout). Information provided indicates that all of <br />these wells are completed in the Quaternary alluvium (Qa). The new proposed <br />monitoring plan consists of five alluvial wells including the Gossard Well, one in <br />the Taylor Creek drainage, and three in Good Spring Creek alluvium. No <br />monitoring beyond baseline collection has been proposed For Wilson Creek at this <br />time. Based on information contained in Table 2.04.7-29 submitted with PR-02, <br />it appears that adequate baseline data has been collected at each of the three major <br />drainages Taylor, Wilson, and Good Spring Creek. With incorporation of <br />groundwater points of compliance wells as previously described, the proposed <br />groundwater monitoring plan appears adequate. There is however, a discrepancy <br />in the proposed plan as described on page 107 of Volume 12. Colowyo indicates <br />that eight groundwater sites will be monitored including seven alluvial aquifer <br />wells and one bedrock aquifer well located along Taylor and Good Springs <br />Creeks. As indicated above, only five wells are described for the proposed plan. <br />Please clarify this discrepancy and identify the additional three wells that will be <br />included in the proposed groundwater monitoring plan. <br />Please ensure that baseline groundwater monitoring data is provided for all wells <br />that aze to be included in the groundwater monitoring plan and update Table <br />2.04.7-29 accordingly. <br />4. Our initial review of Division of Water Resources well records indicates that there <br />aze two wells (one irrigation use and one domestic use) registered with the State <br />Engineer that are in the Good Spring Creek alluvium, down hydraulic gradient <br />from mining impact areas. Also, Map 11 A submitted with PR-02 shows several <br />registered wells that appear to be completed in the Quaternary alluvium. This <br />appears to be in conflict with the statement on page 83, Volume 12 that ... "There <br />aze no registered shallow alluvial aquifers, beneficial-use wells in the Colorado <br />Division of Water Resources well database within several miles, down gradient of <br />the mining impact areas (Map 11A)." Please clarify and substantiate this <br />statement by providing the well completion log or other permit records for those <br />wells shown on Map 11 A that appear to be completed in the Quaternary alluvium. <br />Based on our information, it may be necessary to reevaluate the State Engineers <br />records and incorporate this information into the groundwater points of <br />compliance evaluation. <br />5. Please provide a well completion diagram and a well completion summary table <br />for all of the active monitoring wells in the currently approved monitoring plan <br />and for those proposed with PR-02. At a minimum please provide the following <br />information for all active monitoring wells: location, formation or seam <br />