Portal Powerhouse - Portal Forebay

Description: Portal Powerhouse - Portal Forebay - Excavation in progress in intake channel.
Type: Visual Materials(Opens in new tab)
Date: 9/15/1955
Call number: photCL SCE 02 - 43725
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

Daily: 10 A.M.–5 P.M.

Closed on Tuesdays

1151 Oxford Road
San Marino, CA 91108

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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Progress of excavation in intake channel to vertical shaft.
photCL SCE 02 - 43703
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Looking up inlet channel, showing excavation progress.
photCL SCE 02 - 43548
Portal Powerhouse - Forebay
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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
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Upper portion of intake channel and portal of tunnel.
photCL SCE 02 - 43756
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Intake channel erosion through blanket & blanket protection since placement in 1955.
photCL SCE 02 - 44787
Portal Powerhouse - Forebay - Partially complete intake channel excavation shown Camp 61 shaft
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Portal Powerhouse - Forebay - Partially complete intake channel excavation shown Camp 61 shaft - up right.
photCL SCE 02 - 43630