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Visual Materials

Portal Powerhouse - Forebay

Description: Portal Powerhouse - Forebay - Large boulder in dam foundation at station 5+00.
Type: Visual Materials(Opens in new tab)
Date: 7/20/1955
Call number: photCL SCE 02 - 43587
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 - Scraping foundation of dam site near Station 3+00.
photCL SCE 02 - 43585
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 - 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 - Compacting downstream dam foundation near west abutment.
photCL SCE 02 - 43580
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Dam foundation prepared for fill placement near west abutment.
photCL SCE 02 - 43582
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Preparation for rolling 24" diameter sluice pipe in place at forebay dam.
photCL SCE 02 - 43332