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411 <br /> OURAY SILVER MINES <br /> PO Box 564, 1900 Main Street,Unit 1,Ouray,Colorado,USA 81427 <br /> Tel.970-325-9830-Fax.970-325-9824 <br /> Revenue Mine <br /> Water Monitoring Update, Pilot Passive Treatment <br /> Materials Placement, and Reclamation Plan Updates <br /> Technical Revision No. 11 <br /> CDRMS Permit No. M-2012-032 <br /> March 26, 2020 <br />