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Ouray Silver Mines, Inc. <br /> 1900 Main St. Unit 1 <br /> PO Box 564 <br /> Ouray, CO 81427 <br /> QL1R-AV SIL1✓ER MIS E <br /> To: Colorado Division of Reclamation, Mining& Safety <br /> 1313 Sherman Street, Rm 215 <br /> Denver, CO 80203 <br /> From: Brian K. Briggs, P.E., Chief Executive Officer <br /> Date: August 14, 2018 <br /> Subject: Technical Revision to DRMS 1 12(d) Mining Permit# M2012-032 <br /> Dear Mr. Marshall, <br /> Please find the enclosed request for technical revision to Permit M2012-032 for the Revenue-Virginius <br /> Mine(Mine),operated by Ouray Silver Mines Inc. (OSMI)under Division of Reclamation, Mining, and <br /> Safety (DRMS) Permit No. M-2012-032. Included in this submission are: <br /> • Technical Revision Fee($1006) <br /> • Technical Revision Request Form <br /> • Supporting Information <br /> As explained in detail in the supporting information,this technical revision seeks to: <br /> • Allow for the construction of an already CDPHE permitted Five-stage passive treatment system <br /> with surface water discharge at a new industrial wastewater outfall (Outfall 002A) <br /> • Allow for construction of a new monitoring well to monitor the passive treatment system <br /> • Allow for a diesel tank to be moved to a less congested area <br /> OSMI looks forward to working with DRMS in this permitting endeavor. <br /> Please do not hesitate to call me with concerns or questions at 970-325-9830. <br /> Sing el <br /> Brian K. Briggs PE <br /> CEO, Ouray Silver Mines Inc. <br /> Phone:(970)325-9830 ♦ Fax:(970)325-9824 <br />