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2024-12-16_REVISION - M1977410 (26)
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2024-12-16_REVISION - M1977410 (26)
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Last modified
12/17/2024 10:24:26 AM
Creation date
12/17/2024 7:48:19 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1977410
IBM Index Class Name
Revision
Doc Date
12/16/2024
Doc Name Note
Appendix G-2 Water Treatment System
Doc Name
Request For Conversion
From
Grand Island Resources LLC
To
DRMS
Type & Sequence
CN1
Email Name
JPL
JLE
EL1
LJW
THM
Media Type
D
Archive
No
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M-1977-410 <br />Technical Revision 10 <br />April 26, 2022 <br />6 <br /> <br /> <br />The General site map (Figure 1) presents locations of the water management features, the inset table <br />provide pipe identification, size and additional relevant information. The Figure is also included in <br />Appendix B. <br />The following paragraphs provide additional management details: <br />1. Cross Mine underground water management strategies include inside the mine water routing to the <br />Juliet raise which can be described as an existing feature (excavation) connecting the lower levels of the <br />Cross mine with the tunnel level where suspended solids concentrations are reduced via gravity settling. <br />Cross Mine underground waters are conveyed to the surface Pond #1 via pumping from the winze. The <br />historical addition of lime to waters conveyed to the Juliet raise was discontinued in 2021. <br />2. Lime was added as trial basis on a couple of occasions to the Caribou Water at Pond 3b settling pond <br />(location of Pond 3b in revised Figure 1 above), expected results were not achieved and therefore the <br />practice was stopped. <br />3. Pond #1 overflow pipe reports to Pond 2, over the course of 2022, no overflow from Pond #1 to Pond <br />#2 has occurred. <br />4. Pond #2 discharge pipe into Coon Track Creek remains operational because Pond #2 is still in service. <br />Currently and as a result of the DRMS approved pipe connection between Pond 3C and Pond #1, all inflow <br />to Pond #2 comes from the treatment system and therefore, Pond #2 overflow discharge would only occur <br />under climatic upsetting conditions. <br />5. All effluent discharged into Coon Track Creek consists of treated water. <br />6. Commissioning of the recently DRMS approved pipeline extension from Pond #1 into the Juliet raise in <br />the Cross Mine Pond #1 overflow into Pond #2 and Pond #1 overtopping probability are eliminated (Section <br />7) <br /> <br /> <br /> <br />
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