Visual Materials
Big Creek Powerhouse #4
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Diversion tunnel outlet after placing bulkhead.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Leakage from diversion tunnel before placing bulkhead.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Lower end of diversion tunnel after closing bulkhead
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Backfilling diversion tunnel bulkhead.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - [Dam 7] Riverbed below lower cofferdam.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Construction pictures taken by Dam & Tunnel Office. [Tunnel workers in Dam 7 Diversion Tunnel]
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