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Visual Materials

Portal Powerhouse - Forebay

Description: Portal Powerhouse - Forebay - Exposed bedrock in upstream cutoff between Stations 3+50 and 4+25.
Type: Visual Materials(Opens in new tab)
Date: 7/25/1955
Call number: photCL SCE 02 - 43318
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 - Forebay
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Portal Powerhouse - Forebay - Evidence of bed rock exposed by excavation between Stations 2+00 & 3+00, near the left abutment and along dam axis.
photCL SCE 02 - 43326
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View from left abutment showing completed foundation preparation under a portion of rock fill section. Shovel and Dozer excavating in upstream cutoff.
photCL SCE 02 - 43304
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - View from station 5+00, looking toward left abutment, showing outcroppings of ledge rock while excavating for upstream cutoff under impervious section.
photCL SCE 02 - 43311
Portal Powerhouse
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Portal Powerhouse - Silt layer exposed in excavating for upstream cutoff upstream from upstream toe.
photCL SCE 02 - 43312
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Sluice pipe viewed from upstream.
photCL SCE 02 - 43612
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Placing earthfill upstream from sluice pipe.
photCL SCE 02 - 43596