Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Cut bank in rear of powerhouse structure showing extent of minor washing due to overflow of seepage water into excavation.
Type: Visual Materials(Opens in new tab)
Date: 9/22/1955
Call number: photCL SCE 02 - 43734
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
Visual Materials
Portal Powerhouse - Forebay - Foundation excavation in vicinity of sluice pipe. Picture covers from axis to upstream toe. Dragline excavating for impervious cut-off upstream from toe to lessen seepage.
photCL SCE 02 - 43310
Portal Powerhouse - Water trapped during night around powerhouse structure
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Portal Powerhouse - Water trapped during night around powerhouse structure - due to failure of diversion pipe to carry increased seepage thru rack fill between tunnel diversion channel and bench at elevation.
photCL SCE 02 - 43733
Portal Powerhouse
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Portal Powerhouse - South bank of powerhouse excavation with considerable seepage from tunnel diversion.
photCL SCE 02 - 43528
Portal Powerhouse
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Portal Powerhouse - Continuance of washing daused by break-through of seepage water from diversions. Discharge was reduced to eliminate auxiliary spill in pipe.
photCL SCE 02 - 43962
Portal Powerhouse
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Portal Powerhouse - Extent of washing due to high water in Potter Creek.
photCL SCE 02 - 44559
Portal Powerhouse
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Portal Powerhouse - North slope of excavation of tailrace in front of powerhouse structure.
photCL SCE 02 - 43758