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NewmontTM Newmont Mining Corporation <br /> Cripple Creek&Victor Gold Mining Company <br /> 100 North 3rtl St <br /> TR120 P O.Box 191 <br /> Victor.CO 80860 <br /> - wmv.newmont.com <br /> TC11mac <br /> January 23, 2020 JAN 2 4 70?0 <br /> DIVISION OF RECLAMA*nON <br /> SENT CERTIFIED RETURN RECEIPT REQUESTED MINING&SAFETY <br /> 7017 2400 0000 1533 6629 �, <br /> � v j <br /> Mr. Timothy Cazier,P.E. M 000 <br /> Environmental Protection Specialist a o <br /> Colorado Department of Natural Resources ru <br /> Division of Reclamation, Mining and Safety <br /> Office of Mined Land Reclamation o <br /> 1313 Sherman Street,Room 215 N <br /> Denver,Colorado 80203 <br /> Re: Permit No.M-1980-244; Cripple Creek&Victor Gold Mining Company; Cresson Project; — <br /> TR 120—Process Fluid Iniection Proeram Expansion <br /> Cn <br /> Dear Mr.Cazier: o h w <br /> Newmont Corporation's Cripple Creek and Victor Gold Mining Company (CC&V) hereby submits o <br /> Technical Revision (TR) 120, outlining the expansion to the previously approved Hydrojex Injection <br /> Program. <br /> Backeround• <br /> On March 29, 2010, DRMS approved "Technical Revision#57 (TR-57) Process Fluid Injection Program <br /> on the Valley Leach Facility"(VLF), authorizing CC&V to implement the"Hydrojex" injection program. <br /> TR-57 (Attachment 1) outlines injection monitoring criteria. In addition to the monitoring plan, TR-57 <br /> approved the use of an initial nine injection wells in a pilot program. After CC&V demonstrated that the <br /> Hydrojex wells could be operated safely through the implementation of the established monitoring plan, <br /> CC&V installed additional Hydrojex wells(Figure 1). <br /> With TR-57 approval, DRMS determined that the installation and monitoring of the Hydrojex wells <br /> required no adjustment to the financial warranty calculations. <br /> Proposal: <br /> CC&V proposes to execute the program approved under TR-57 to utilize all existing injection wells as well <br /> as any future injection wells installed on all CC&V VLFs in accordance with the criteria outlined in TR- <br /> 57. Modeling conducted by AMEC (included in the 2010, TR-57 submission)demonstrates that injections <br /> can be performed safely when key monitoring criteria are followed. CC&V will operate and monitor all <br /> injection wells within the approved parameters outlined in TR-57. In addition to the monitoring criteria, <br /> CC&V will also construct any new injection wells within the criteria stated in TR-57. <br />