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2022-02-09_PERMIT FILE - M2021046 (7)
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2022-02-09_PERMIT FILE - M2021046 (7)
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Last modified
2/9/2022 4:05:07 PM
Creation date
2/9/2022 3:02:51 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2021046
IBM Index Class Name
Permit File
Doc Date
2/9/2022
Doc Name Note
Adequacy Response Application Revisions
Doc Name
Adequacy Review Response
From
Zephyr Gold USA Ltd
To
DRMS
Email Name
TC1
MAC
Media Type
D
Archive
No
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2.7 Exhibit G: Water Information <br /> Bishop Brodgen and Associations, Water Consultants, specifically Timothy A. Crawford and Christopher <br /> J. Sanchez, prepared the contents of this exhibit on behalf of Zephyr USA. <br /> As discussed below,the proposed mining operation is expected to intercept ground water and has the <br /> potential to affect surface or ground water systems at and in the vicinity of the proposed mine location. <br /> Provided below is information that describes the surface and ground water systems and provides details <br /> regarding potential impact on those systems as a result of the proposed mining. As summarized below, <br /> any impact that may result from the mine to ground and surface water systems is expected to be <br /> minimal and inconsequential. <br /> 2.7.1 Property and Water Information Summary <br /> The proposed Zephyr Dawson property gold mine is located as presented in the attached Figure 1 which <br /> encompasses the affected land and adjacent land where impacts may potentially be observed. The <br /> proposed mine is located in Fremont County approximately 5.9 miles southwest of Canon City, <br /> Colorado. <br /> Windy Gulch and Dawson Gulch flow through and around the mine in the immediately vicinity of the <br /> property and locally drain the foothills to the south and surrounding the property. These gulches are <br /> typically dry and only flow during large precipitation events. Grape Creek is a larger, perennial surface <br /> water feature that drains a larger basin to the west and southwest of the property The surface drainages <br /> are located as presented in Figure 1. <br /> The surface geology at the property is mapped as Precambrian granodiorite consisting of massive to <br /> foliated, medium to coarse grained granodiorite and lesser amounts of quartz monzonite and quartz <br /> diorite (Miscellaneous Investigations Series Map 1-869). The subsurface at the property contains part of <br /> a thin, but laterally extensive zone of gold and base-metal mineralization that trends east-northeast and <br /> dips to the south-southeast. This is the targeted gold seam. To the north of the property,the <br /> Precambrian granodiorite material contacts sedimentary bedrock including the Dakota formation and <br /> the Morrison Formation along an unnamed east-west, steeply dipping fault. Local terrace deposits <br /> (unconsolidated quaternary material) are also mapped in the general vicinity of the property. The <br /> mapped surface geology in the vicinity of the site is presented in Figure 2. <br /> Available well data, including data from two monitoring wells at the property, indicate that the <br /> Precambrian granodiorite (a fractured hard rock unit, "Precambrian material") and the Dakota <br /> formation are locally saturated and transmit water. For the purposes of this summary,the Precambrian <br /> material and the Dakota formation are considered aquifers. The extent of the saturation within the <br /> aquifer systems may be limited based on observations from the monitoring wells. Other geologic units <br /> identified in Figure 2 are not considered to be aquifers. Regional ground water gradients in the aquifers <br /> are generally towards the north in the Precambrian material from the mountainous areas south of the <br /> mine and towards the east/northeast in the Dakota formation towards the center of the Canon City <br /> Embayment. <br /> Local recharge sources are mainly limited to precipitation that infiltrates the formations either as direct <br /> recharge or along drainages during runoff where they are present at the surface. Grape Creek to the <br /> north of the mine area appears to be in connection with the Precambrian material based on winter base <br /> 35 <br />
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