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2017-04-18_REPORT - M1980244
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2017-04-18_REPORT - M1980244
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Entry Properties
Last modified
12/19/2020 6:48:43 AM
Creation date
4/19/2017 12:32:32 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Report
Doc Date
4/18/2017
Doc Name Note
2016 Annual Report
Doc Name
VLF Geotechnical Report
From
CC&V
To
DRMS
Email Name
TC1
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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Newmont Mining Corporation , <br /> Cripple Creek and Victor Gold Mining Company . <br /> 2016 Annual Arequa Gulch and Squaw Gulch Valley Leach Facilities Inspection <br /> NewFields Project 475.0160.001 <br /> April 11,2017 <br /> The majority of the underdrains were dry during the period of record with the exception LID <br /> South. The flow measured from LID South varied between 4.3 gpm to 46.7 gpm. Based on the <br /> as-built information NewFields received from CC&V, it appears the UD South underdrain is fed <br /> by a natural spring located in the northeast corner of the pad under the Phase 5 expansion. <br /> The chemistry of the samples taken from this underdrain suggests that the water is from the <br /> natural spring given that there is no measurable concentration of WAD Cyanide in the samples <br /> evaluated. <br /> 2. SQUAW GULCH VALLEY LEACH FACILITY <br /> This section presents visual observations made as part of the SG-VLF inspection. The inspection <br /> covered the Phase 1 VLF and was focused on the conditions of the overall ore slopes, ore <br /> benches, foundation conditions of the Pregnant Solution Storage Area (PSSA), the PSSA <br /> containment embankment, and the ore stacking geometry. <br /> 2.1. Visual Inspection <br /> On December 5, 2016, NewFields personnel accompanied by Newmont personnel completed a <br /> visual inspection of the SG-VLF by driving from the LOB down to the PSSA risers located near <br /> the ADR 2 building on the main onsite access road. At the time of inspection, the ore had been <br /> stacked to an elevation 9650' above sea level. NewFields paid particular attention to the most <br /> critical slope located above the PSSA risers. <br /> The ore slopes within the SG-VLF were observed to be stable and NewFields did not observe <br /> signs of slope slumping, seepage expression of slope faces (evidence of perched water zones), <br /> surface cracking, or any other signs of any slope movements (i.e. surface tension cracks at the <br /> slope crest or bulging at the toe of the slopes). Above the PSSA Risers, the ore set back appears <br /> to be adequate, and the slope above the risers appears dry and stable. <br /> While on site, NewFields took several pictures to document the current condition of the SG- <br /> VLF, which can be seen in Figure 4, Photo Log. Figure 5, Current Topography, shows the latest <br /> configuration of the SG-VLF, as of October 2016,the date of the most recent fly over. <br /> The toe area below the PSSA embankment were also visually inspected and showed no signs of <br /> distress or instability. The toe area appeared to be dry (no seepage on slope faces or beyond <br /> the toe). The foundation and embankment slopes did not show any signs of distress. <br /> 2.2. Pad Growth and Pad Geometry <br /> Utilizing the Flyover Topography for 2015 and 2016, NewFields compared the pad surfaces <br /> looking for differences in the existing side-slopes and pad height. During this period the PSSA <br /> Page 4 <br />
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