Visual Materials
Big Creek Powerhouse #4
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Placing concrete in block 9.
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Big Creek Powerhouse #4 - Vibrating stiff concrete block 9.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Experimental concrete containing Aivon Pozzolan in Block 9.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - Preparing Block 8 for placing concrete.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - [Dam 7] placing concrete block #10.
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Big Creek Powerhouse #4
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Big Creek Powerhouse #4 - [Dam 7] Typical stiff concrete, block 10.
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