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Big Creek - Mammoth Pool - Concrete forming at diversion tunnel portal
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Big Creek - Mammoth Pool - Setting concrete forms at diversion tunnel portal
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Big Creek - Mammoth Pool - Concrete pour at diversion tunnel portal at night
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Big Creek - Mammoth Pool - Concrete pour at diversion tunnel portal at night
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Big Creek - Mammoth Pool - General view of diversion tunnel intake portal concrete
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Big Creek - Mammoth Pool - Grouting diversion tunnel portal
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