Portal Powerhouse

Description: Portal Powerhouse - Excavation for spill pipe of Surge Tank.
Type: Visual Materials(Opens in new tab)
Date: 6/28/1956
Call number: photCL SCE 02 - 44605
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 - Surge Tank excavation.
photCL SCE 02 - 44602
Portal Powerhouse
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Portal Powerhouse - Surge Tank excavation.
photCL SCE 02 - 44603
Portal Powerhouse
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Portal Powerhouse - First stage of Surge Tank excavation. Rock near top is decomposed granite.
photCL SCE 02 - 44604
Portal Powerhouse
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Portal Powerhouse - Excavation below pipe. Progress about 7ft. from final elevation.
photCL SCE 02 - 43658
Portal Powerhouse
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Portal Powerhouse - Forebay - Foundation excavation in vicinity of sluice pipe. Picture covers from axis to upstream toe. Dragline excavating for impervious cut-off upstream from toe to lessen seepage.
photCL SCE 02 - 43310
Portal Powerhouse
Visual Materials
Portal Powerhouse - Further excavation for Portal Powerhouse.
photCL SCE 02 - 43610