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_Mr. Peter Hays <br />Re. SerFer Pit, Adequacy Letter Response . <br />August 15, 2008 <br />Page. 4. of 6 <br />The groundwater elevation.. for the 'eastern monitoring well is expected to be <br />approximately feet below the sur face. ' During the installation of the monitoring wells, <br />the depth to groundwater will be recorded 'and compared to. the. estimated groundwater . . <br />depths. If the estimated depth is observed to be significantly different than the estimated <br />gr•ortndivater: depth, the. trigger. Points will be evaluated..It may be. necessary to update <br />the baseline groundwater level based on monitoring well installation observation. In the <br />event that the :estimated . groundwater -levels are. significantly decent than observed <br />groundwater levels, Connell. Resources, Inc. will work.lvith DBMS to, establish an . <br />agreeable and reasonable groundwater.: baseline. <br />Measured gjoundtivater elevations in excess of two feet above or below the estimated <br />baseline. groundwater depths(see above) for three consecutive months will indicate. that <br />the mining or• reclamation, is impacting the groundwater regime and mitigation measures: <br />it?ill be implemented (such as the constr•uction:of a perimeter drain). Connell Resources, <br />Inc.. will provide the DRMS with monthly niotzitoring well data on a quarterly basis, <br />except- in the, event -that .'the monitoring, wells show three consecutive months of <br />exceedence . of the: two foot hIgger•. in which.. case . Connell. Resources, inc.. will notify <br />DRMS within . 48 hours. If the `three-month, two foot trigger. is, reached, Connell <br />Resources,.. Inc. will work with DBMS -to evaluate the cause of issue, . and, identify <br />potential.solutions or additional mitigation measures at that time..: Connell .Resources, <br />Inc. will -identify the additional mitigation measures or potential solutions within. 15 <br />working days after notifying DRMS.of the exceedence. <br />Connell Resources, Inc.. will commit to. investigating in response to claims of negative <br />groundwater impacts. from permitted well owners, on adjacent properties. If this . <br />investigation finds that the groundwater impacts are significant, Connell-Resources, Inc. <br />will work with DRMS to evaluate the. cause of the. issue and identt&potential solutions or . <br />additional mitigation measures at 'that time. Connell Resources, Inc. will identify the <br />additional. mitigation measures or potential solutions ivithin IS working days.. after <br />notifying DRMS of the negative impact on neighboring groundwater wells. <br />8. The applicont.states on page for of the SerFer Pit. Groundwater monitoring Plan an action <br />level will be determine and approved by DBMS. Typically, a trigger point of.a;2,foot <br />change forth historic ground water levels is acceptable to. the Division. Please commit to <br />...a 2 foot trigger point based on (5) quarters of.ground water measurements.. <br />Connell Resources, Inc. will. commit to the. trigger points as, determined in the proposed <br />ve). . <br />groundwater monitoring plan (see number 70b0 <br />9. Please specifically address the. mitigation plan pertaining to. the cottonwood trees located <br />along the site, The USGS document -Responses of Riparian Cottonwoods to Alluvial. <br />Water Table Declines states 'it . is evident that a: drop in groundwater levels of one meter . <br />S. <br />be fatal to cottonwood trees., Please commit to a two foot trigger point based on a five. <br />(5) quarters of groundwater. measurements., The. Division recommends installation. of a, <br />settling, pond adjacent to the cottonwood grove.