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Visual Materials

Portal Powerhouse - Forebay

Description: Portal Powerhouse - Forebay - Progress picture placing fill in dike embankment.
Type: Visual Materials(Opens in new tab)
Date: 8/15/1955
Call number: photCL SCE 02 - 43550
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 - Progress picture of forebay earth and rock fill dam.
photCL SCE 02 - 43700
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.
photCL SCE 02 - 43549
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Fill placing operation as seen from east abutment.
photCL SCE 02 - 43632
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Portal Powerhouse - Forebay - Fill placing operation as seen from east abutment.
photCL SCE 02 - 43633
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.
photCL SCE 02 - 43327
Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Placing first fill in impervious section under location of sluice pipe. Note dozer pushing layer of saturated & disturbed surface material, exposing firm foundation, before fill placement.
photCL SCE 02 - 43315