2018-03-26_REVISION - M1980244 (2)

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NEW MO N T Newmont Mining Corporation Cripple Creek&Victor Gold Mining Company 100N3"St M-7/ 98�- P.O Box O80860 244 — TR98 191 Victor, m nt.co Complied! www.newot.com 5 TOTAL Violations tc1, whe SENT CERTIFIED RETURN Ktl nu —EQUESTED RECEIVED 7017 2400 0000 4077 7763 March 22,2018 2010 lQ1iMIKA* iy Mr.Timothy Cazier,P.E. Environmental Protection Specialist Colorado Department of Natural Resources Division of Reclamation,Mining and Safety Office of Mined Land Reclamation 1313 Sherman Street,Room 215 Denver,Colorado 80203 Re: Permit No. M-1980-244; Cripple Creek&Victor Gold Mining Company(CC&V); Cresson Project; Poverty Gulch Monitoring Wells Installation—TR#98 Dear Mr.Cazier: Newmont Mining Corporation's Cripple Creek and Victor Gold Mining Company(CC&V)hereby submits the following Technical Revision(TR)98 proposing the installation of groundwater monitoring wells within Poverty Gulch. Background Poverty Gulch is a small valley immediately to the west of the CC&V mine site(Figure 1). In 2000, CC&V drilled and constructed Poverty Gulch monitoring wells PGMW-IA and PGMW-1B (Figure 2). Water samples were collected from these wells from March of 2000 through July of 2001. In 2001 these monitoring wells were abandoned and monitoring well PGMW-2 was constructed(Figure 2). PGMW-2 is a four inch completion with a total depth of 219 feet and a screened interval from 189 to 219 feet. When constructed,the well did not intercept water and has been continually monitored as a CC&V groundwater monitoring compliance location since 2001. Throughout monitoring,PGMW-2 has remained dry. During an internal review,CC&V identified a commitment to install two additional monitoring wells within Poverty Gulch; PGMW-3 &PGMW-4(Figure 3). This commitment was identified within the Amendment 9 final adequacy response dated October 15,2008. CC&V met with DRMS on November 28,2017 to discuss the commitment and propose potential locations for construction of the new wells. From the discussion,it was identified that the new monitoring wells should be constructed within the alluvium of Poverty Gulch outside of the identified diatreme boundary.