2018-07-16_GENERAL DOCUMENTS - M1980244

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NEW MON T Npwrnont Mining Corporation Grippe C,c,,k 8'J;ctcr G-,d rQiJ'9`-t PO En,1,1 Victor CO 80860 w,vp,ne iw nd r_,m RECEIVED July 12,2018 ja 6 Y018 SENT CERTIFIED RETURN RECEIPT REQUESTED 7017 2400 0000 4077 9026 DIVISIONMiN Of F`E0LP'MA'T10N G AND SAFETY Mr. Russ Means Minerals Program Director Colorado Department of Natural Resources Division of Reclamation,Mining and Safety 1313 Sherman Street,Room 215 Denver, Colorado 80203 Re: DRMS Permit No. M-1980-244: Cripple Creek & Victor Gold Minine Company (CC&V); Cresson Proiect: July 3'd Globe Hill Blast Dear Mr.Means: th As discussed in our hone call on Monday Jul 9 Newmont Mining Corporation - Cripple Creek & Victor Gold p Y Y � g � Mining Company (CC&V) began blasting the Globe Hill and Schist Island pits in the morning to better accommodate CC&V's neighbors. CC&V personnel worked with the Colorado Air Pollution Control Division (APCD) to obtain special permission to blast from 7 to 9 AM during the Mollie Kathleen tour season. Blasting at 7:30AM allows the Mollie Kathleen operators to inspect their facilities after CCV's blast, but prior to bringing guests underground. On the morning of July 3`d, at approximately 7:30AM, CC&V executed a production blast in the Globe Hill pit. During the shot, winds were from the northwest at two mph. Additionally, there was a strong inversion which caused the dust from the shot to dissipate at a slower than anticipated rate and travel as a cloud down Poverty Gulch. The performance of the shot was normal,pattern loading was normal and nothing was unusual with the shot. The only extenuating circumstance causing lingering dust in Poverty Gulch was the inversion. While dust from the blast was visible and dissipated slowly, CC&V's compliance monitor in Poverty Gulch demonstrated that CC&V was in compliance with the National Ambient Air Quality standards' (NAAQS)24-hour PM 10 standard. In order to comply with Mine Health and Safety regulations, CC&V is required to block off an exclusion zone around the shot and clear all personnel from this zone. During the shot on July 3rd, CC&V personnel had blocks set on County Road 82 on either side of the Ironclad Access Road and on County Road 821. CC&V Personnel did not have blocks set anywhere else in the adjacent area. Please note, CC&V uses physical barricades to block access to the blast exclusion zone(pickup trucks,other pieces of equipment); flaggers are not used. To prevent a recurrence of this event, several additional controls have been implemented. CC&V will wet the blast pattern and surrounding area prior to setting off any future blasts. Additionally, CC&V will use wind speed and direction data collected on site to determine if conditions are favorable for blasting in the Globe Hill pit. CC&V collects wind speed and direction at two different sites located on the mine site and this information is available in 1