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NEWMONT <br /> Newmont Mining Corporation <br /> Cripple Creek&Victor Gold Mining Company <br /> MAY 3 0 2018 100 North V Street <br /> P.O.Box 191 <br /> Victor,CO 80860 <br /> DIVISION OF RECLAMATION www MINING AND SAFETY newmont com <br /> SENT UPS OVERNIGHT <br /> May 29, 2018 <br /> Mr. Timothy Cazier, P.E. <br /> Environmental Protection Specialist <br /> Colorado Department of Natural Resources <br /> Division of Reclamation, Mining, and Safety <br /> Office of Mined Land Reclamation <br /> 1313 Sherman Street, Room 215 <br /> Denver, Colorado 80203 <br /> Re: Permit No. M-1980-244; Cripple Creek & Victor Gold Mining Company ("CC&V"); <br /> Cresson Project, — Response to DRMS Technical Revision (TR-97) Adgquacy Review for <br /> Grassy Valley- Monitoring Well Installation <br /> Dear Mr. Cazier: <br /> On March 27, 2018, the Cripple Creek and Victor Gold Mining Company (CC&V) submitted a <br /> Technical Revision (TR) #97 proposing the installation of a monitoring well within Grassy <br /> Valley at the Cresson Project Permit M-1980-244. On May 2, 2018, CC&V received <br /> Preliminary Adequacy Review comments from the Division of Reclamation, Mining and <br /> Safety's (DRMS). Please see the responses below to address the outstanding adequacy concerns, <br /> DRMS' comments in italics with Newmont's response to comments in bold. <br /> Comment 1: Figures 2 <br /> The plan on page 2 states "CC&Vproposes to install a monitoring well within Grassy <br /> Valley to monitor groundwater quality downgradient of the ECOSA seep location. " <br /> However, Figure 2 (Proposed ECOSA Monitoring) shows the monitoring well <br /> downgradient of the ECOSA Seep Accumulation Pond. Although the proposed location <br /> of GVMW-25 allows CC&V to monitor the ECOSA Seep Accumulation Pond, the <br /> Division is concerned the well will fail to monitor the 2017 Seep Location and therefore <br /> the installation of an additional monitoring well appears warranted. The location of this <br /> additional well might be more appropriate downgradient of the seep location, <br /> approximately 800 feet east-southeast of GVMW-25. Please demonstrate how the sole <br /> location of GVMW-25 is sufficient to demonstrate compliance with the Rules or commit <br /> to installing an additional monitoring well. <br />