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Visual Materials

Portal Powerhouse - Forebay

Description
Portal Powerhouse - Forebay - Progress picture showing placement of upstream impervious fill in sluice pipe area, to top of 24" sluice pipe concrete encasement.
Type
Visual Materials(Opens in new tab)
Date
7/27/1955
Call number
photCL SCE 02 - 43327
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

    Portal Powerhouse - Forebay

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    Portal Powerhouse - Forebay - Completed concrete encasement around 24" diameter sluice pipe through rock fill downstream section.

    photCL SCE 02 - 43536

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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

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    Portal Powerhouse - Forebay - First rock fill in sluice pipe area. Note silty surface mud being pushed immediately ahead of placement rock.

    photCL SCE 02 - 43324

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    Portal Powerhouse - Forebay - Installing 6" dia. drain in foundation, sluice pipe area, prior to any fill. Note form for concrete cutoff around pipe. One of three installed.

    photCL SCE 02 - 43323

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    Portal Powerhouse - Forebay - Impervious fill upstream and start of rock fill in sluicepipe area of forebay dam.

    photCL SCE 02 - 43322

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    Portal Powerhouse - Forebay - Sluice pipe and encasement viewed from downstream.

    photCL SCE 02 - 43613