Table 42. Proposed Monitoring Bores
Bore ID
Target Depth* mbgs
Screening interval* m bgs
Target lithology
Rationale and/or other comments
MB24S
15
7 to 15
Diorite
Confirm depth to bedrock and pre-mining drainage lines, monitor shallow seepage pathways within Western WRD Confirm bedrock conditions and groundwater levels beneath Western WRD; monitor deeper groundwater flow and potential seepage pathways toward OCP. Confirm depth to bedrock and pre-mining drainage line alignment; monitor shallow seepage within Western WRD along inferred OCP flowpath Confirm deeper groundwater conditions and potential seepage pathways beneath WRD; assess deeper flow toward OCP. Confirm bedrock depth at valley low point within TSF footprint; monitor shallow WRD- related seepage along inferred OCP drainage line Confirm groundwater conditions beneath WRD at valley low point; monitor deeper flow and seepage pathways toward OCP. Demonstrate hydraulic containment along ridge-valley system defining Upper Mundic Valley; assess shallow bedrock conditions and potential seepage pathways. Demonstrate hydraulic containment along ridge-valley system; assess deeper groundwater flow within sandstone units dipping westward. Characterize groundwater conditions within TSF footprint upgradient of Western WRD and ephemeral pond; assess baseline sandstone aquifer conditions. Demonstrate hydraulic containment along ridge-valley system defining Upper Mundic Valley; assess shallow bedrock flow conditions Demonstrate hydraulic containment; assess deeper groundwater flow in sandstone units and regional dip toward west. Demonstrate hydraulic containment along ridge-valley system defining Upper Mundic Valley; assess shallow seepage pathways. Demonstrate hydraulic containment; assess deeper groundwater conditions and sandstone dip to west
MB24D
50
15 to 50
Diorite
MB25S
40
30 to 40
Diorite
MB25D
60
40 to 60
Diorite
MB26S
35
27 to 35
Diorite
MB26D
55
35 to 55
Diorite
MB27S
25
17 to 25
Sandstone
MB27D
50
35 to 50
Sandstone
MB28
50
35 to 50
Diorite
MB29S
25
17 to 25
Sandstone
MB29D
50
25 to 50
Sandstone
MB30S
25
17 to 25
Sandstone
MB30D
50
25 to 50
Sandstone
MB31
50
25 to 50
Diorite
Characterize groundwater conditions between UMG TSF and No. 8 Dam
MB32
50
25 to 50
Diorite
Characterize groundwater conditions between UMG TSF and No. 8 Dam
Project number: 25B061
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