Portal Powerhouse

Description: Portal Powerhouse - First concrete around draft tube.
Type: Visual Materials(Opens in new tab)
Date: 9/12/1955
Call number: photCL SCE 02 - 43709
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

Daily: 10 A.M.–5 P.M.

Closed on Tuesdays

1151 Oxford Road
San Marino, CA 91108

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Portal Powerhouse
Visual Materials
Portal Powerhouse - First concrete around draft tube.
photCL SCE 02 - 43708
Portal Powerhouse
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Portal Powerhouse - View of forming for substructure concrete, showing neat excavation in tight decomposed granite for the draft tube encasement.
photCL SCE 02 - 43623
Portal Powerhouse - Setting first section of draft tube
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Portal Powerhouse - Setting first section of draft tube - progress picture.
photCL SCE 02 - 43691
Portal Powerhouse
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Portal Powerhouse - Top portion of draft tube gates while pumping out tailrace pool.
photCL SCE 02 - 44586
Portal Powerhouse
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Portal Powerhouse - Foundation excavation in firm decomposed granite draft tube side of powerhouse. Excavation approx. 1' above final grade.
photCL SCE 02 - 43546
Portal Powerhouse
Visual Materials
Portal Powerhouse - Draft tube gates set temporarily in place till work resumes next year.
photCL SCE 02 - 43779