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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Powerhouse excavation. View from west edge of pit.
Type: Visual Materials(Opens in new tab)
Date: 8/17/1955
Call number: photCL SCE 02 - 43659
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

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Portal Powerhouse
Visual Materials
Portal Powerhouse - Powerhouse excavation. View from north edge of pit.
photCL SCE 02 - 43660
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View from downstream of sluice pipe foundation excavation.
photCL SCE 02 - 43588
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View from left abutment showing progress in reservoir clearing and borrow pit stripping. Portion of new road location in background to right of center.
photCL SCE 02 - 43305
Portal Powerhouse
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Portal Powerhouse - View to highway bridge with tailrace channel excavation readying large boulders for blasting.
photCL SCE 02 - 43640
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View of intake channel taken from vertical shaft. Absence of hard rock in area of excavation is here shown.
photCL SCE 02 - 43631
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