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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Another view of rock dust emitting from hot-mix plant operation.
Type: Visual Materials(Opens in new tab)
Date: 8/12/1955
Call number: photCL SCE 02 - 43543
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
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Portal Powerhouse - Dust drifting over Bechtel camp from hot-mix plant.
photCL SCE 02 - 43544
Portal Powerhouse
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Portal Powerhouse - Hot bitumulo [?] plant used on State Hwy. construction below powerhouse.
photCL SCE 02 - 43662
Portal Powerhouse
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Portal Powerhouse - Another view of discharge through spray chamber.
photCL SCE 02 - 43930
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View from right abutment showing site preparation for downstream rock fill portion of the dam.
photCL SCE 02 - 43306
Portal Powerhouse
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Portal Powerhouse - Another view of discharge at approximately 1500 cfs flow thru tunnel.
photCL SCE 02 - 43919
Portal Powerhouse - Forebay
Visual Materials
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