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Big Creek - Mammoth Pool - Wood cribbing at diversion tunnel intake face
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Big Creek - Mammoth Pool - Intake of diversion tunnel
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Big Creek - Mammoth Pool - Stripping overburden at Intake Diversion Tunnel Portal
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Big Creek - Mammoth Pool - Open cut excavation at diversion tunnel intake portal
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Big Creek - Mammoth Pool - Open cut excavation at diversion tunnel intake portal
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Big Creek - Mammoth Pool - Drilling high bottom at diversion tunnel intake portal
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Big Creek - Mammoth Pool - Night work on diversion tunnel intake excavation
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