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Visual Materials

Portal Powerhouse - Forebay

Description: Portal Powerhouse - Forebay - Guniting in progress in area shown on above (left) [previous] photo.
Type: Visual Materials(Opens in new tab)
Date: 10/17/1955
Call number: photCL SCE 02 - 43783
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 - View of intake channel taken from vertical shaft. Absence of hard rock in area of excavation is here shown.
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Portal Powerhouse - Forebay - View from left abutment showing progress in reservoir clearing and borrow pit stripping. Portion of new road location in background to right of center.
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Portal Powerhouse - Forebay - Progress picture
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Portal Powerhouse - Forebay - Progress picture - excavating in upstream cut-off between sluiceway and left abutment.
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Portal Powerhouse - Portal Forebay
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Portal Powerhouse - Portal Forebay - Excavation in progress in intake channel.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Progress picture showing placement of upstream impervious fill in sluice pipe area, to top of 24" sluice pipe concrete encasement.
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