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Visual Materials

Portal Powerhouse

1 of 2

Description: Portal Powerhouse - Select tunnel muck filter zone blanket downstream portion of dam maximum section.
Type: Visual Materials(Opens in new tab)
Date: 7/28/1955
Call number: photCL SCE 02 - 43595
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 - Loading tunnel muck for placement in dam downstream zone.
photCL SCE 02 - 43629
Portal Powerhouse
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Portal Powerhouse - Looking downstream from above Ward Tunnel.
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Portal Powerhouse - Downstream thru spray chamber at approx. 1800 cfs flow thru Ward Tunnel.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Upstream toe of rock fill section of forebay dam showing pervious filter layer in place between rock fill and impervious sections of embankment.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Upper portion of intake channel and portal of tunnel.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Completed concrete encasement around 24" diameter sluice pipe through rock fill downstream section.
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