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bIVISION OF RECLAMATION,. MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215. <br />Denver,. Colorado_ 80203 <br />Phone: (303) 866 -3567 <br />;FAX: (303)$32 - 8106 <br />December 2, 2009 Governor <br />Harris;D. Sherman- <br />Brad .Janes ' ExecutiveDirector' <br />Varra Goinpanies, Inc: Ronald W. cattany <br />:Division Director <br />8120 Gage. St: Natural Resource Trustee <br />Frederick, CO 8.0516 <br />RE: Heintzelrnan Project (Pit .116); DRMS File No. M- 2009 =018; Adequacy :Review_. 04 <br />Dear Mr. Janes, <br />The Division of'Reclamation, Mining and Safety (Division) has identified several other <br />comments and questions that must be addressed prior to the Division's decisiondue date.. Please <br />be advised that'if you Are,unable to satisfactorily address any concerns, identified in this <br />review before .,the decision date,, it will be your responsibility to request. an extensio n of the <br />review period If there, are outstanding issues that have not been adequately addressed <br />prior to the end`of'the review period, and, no extension has been requested, the Division will, <br />deny, this application. <br />6.4.7 Exhibit'G — .Water Information <br />4. The Applicant has indicated that the potential impacts to nearby wells from dewatering may <br />be considerably delayed;: and therefore, the collection of baseline •data prior to dewatering is <br />unnecessary. The Division does not concur with this assertion. The collection of baseline . <br />data,not only serves to...affirm the,groundwater model prediction, but: also .protects the <br />Applicant event the Division receives complaints of impacted wells from dewatering:' <br />activities. The Division requires the Applicant to collect five (5) quarters of baseline data <br />elevations; on ,a monthly basis; from the proposed monitoring locations prior to.dewatering <br />the pits. <br />.The;Apphcant has.`stated ,that if dewatering results in drawdownto the'point adjacent wells <br />cannot.lift,'then mitigation will occur. Rule 3.1.6(1) states that disturbances to the prevailing <br />hydrologic balance of the affected land and of the surrounding area and to the quantity,'or <br />quality of water in surface or groundwater systems both during and after the mining: <br />operation and during reclamation shall be minimized. Waiting until a well cannot lift to.. <br />implement mitigation measures does'not minimize impacts to the hydrologic balance The <br />trigger point§ should be'established at a point where mitigation may take.place before such a <br />situation occurs <br />Office of Office of. <br />Mined Land Reclamation Denver Grand junction Durango Active and Inactive Mines <br />