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Newmont Mining Corporation <br /> NE WMON T RECEIVED C Cieeh 8'ei toi h";ne <br /> iGvj�J No North 3" 0 B Sceet P ca iPt <br /> (,ilia T 119 389 au2L <br /> "4 F 1Si-ibu-3't5a <br /> Vro' <br /> ElY <br /> July 25, 2018 <br /> SENT CERTIFIED, RETURN RECEIPT REQUESTED <br /> 7017 2400 0000 4077 9101 �nf� <br /> Mr. Timothy Cazier,P.E. M,N/NGgNp 'MgT <br /> Environmental Protection Specialist <br /> SAFFrI,�ON, <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"); Cresson Proiect; <br /> Written notification—Float Concentrate Thickener Sump Spill,July 21,2018 <br /> Dear Mr. Cazier: <br /> In accordance with Rule 8, Section 8.2.3 of the Mineral Rules And Regulations of the Colorado Mined Land <br /> Reclamation Board For Hard Rock, Metal, And Designated Mining Operations (Rules), Newmont Mining <br /> Corporation - Cripple Creek and Victor Gold Mining Company (CC&V) hereby provides the Division of <br /> Reclamation, Mining and Safety (Division) with a formal report regarding the July 21, 2018, Float Concentrate <br /> Thickener Sump Spill that occurred at the High Grade Mill(HGM). <br /> The following points address the requirements of Rule 8, section 8.2.3: <br /> a. Actions taken to respond to and correct the emergency situation or condition <br /> • At approximately 1:30 am on July 21, 2018, process personnel were cleaning out the secondary <br /> containment at the HGM Concentrate Thickener when a transfer pump hose moved, spilling <br /> approximately 150 gallons of slurry outside of secondary containment. The portable pump was <br /> immediately shut off and cleanup actions initiated. <br /> • A skidsteer was used to recover the slurry and impacted soil. The soil was removed using an `over- <br /> excavation' approach. Depth of recovery was approximately two to six inches. <br /> • Approximately 20 cubic yards of slurry and soil were transported by the skidsteer to the HGM ore <br /> stockpile. The slurry and over excavated soil were mixed with ore and will be fed back into the HGM. <br /> Clean gravel was placed in the excavated area. <br /> b. Any known or adverse impacts to human health,property or the environment <br /> No impacts to human health or the environment were observed or are expected to occur due to the low <br /> quantity spilled,the benign chemical composition of the concentrate, and the swift clean up. <br /> 1 <br />