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_ 999 _ �_ TATE OF COLOR_ADO <br /> MINED LAND RECLAMATION DIVISION <br /> Department of Natural Resources °� �otp <br /> W/lYw�R <br /> lKril rt'�9 <br /> 1313 Sherman St., Room 275 <br /> Denver,CO 80203 %:�• <br /> 303 866-3567 =•""�' <br /> FAX. 303 832-8106 •ia�6• <br /> Roj Romer, <br /> Gover o, <br /> Fred R Banta, <br /> January 19, 1990 Drvis.on D:rector <br /> Frank M. Graham <br /> Western Mobile <br /> P.O. Box 18570 <br /> Boulder, Colorado 80308 <br /> Re: Technical Revisions TR-02 and TR-03, <br /> Deepe Pit, File M-81 -302 <br /> Dear Mr. Graham: <br /> On January 12, 1990, we received your request for two Technical Revisions to <br /> this existing operation. The first was a request to remove the successional <br /> order from Stages 3, 4, 5 and 6. As you will be submitting your plans on or <br /> before January 25, 1990 we will call this Technical Revision (TR-02) <br /> incomplete at this time, and complete our review when we receive your plans. <br /> The second Technical Revision (TR-03) addressed the inclusion of the <br /> NPDES-regulated dewatering pump system. Before we approve this Technical <br /> Revision, please provide us with the pump location, its ranoe of pumpino <br /> rates, and whether it is situated at the surface or below the water table. <br /> Please also address if the Leonard Rice report addressing off-site impacts <br /> from the dewatering took the pumping into account in its analysis. If it did <br /> not, you should either contact Leonard Rice to have the pumping included in <br /> their study, or agree to limit pumping rates to the level of the aquifer' s <br /> natural rate of inflow. <br /> As we received your requests for these revisions on January 12, 1990, you <br /> should attempt to send us the information for Technical Revision TR-03 <br /> sometime before February 7, 1990. This will allow us to complete the review <br /> within the required 30 day period that ends on February 12, 1990. <br /> Please do not hesitate to call me or Senior Reclamation Specialist Steve <br /> Renner at (303) 866-3567. <br /> Sincerely, <br /> L ��scLc� <br /> Daniel I. Hernandez <br /> Reclamation Specialist <br /> DIH/sco <br /> 3230F <br />