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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - South bank of powerhouse excavation with considerable seepage from tunnel diversion.
Type: Visual Materials(Opens in new tab)
Date: 8/1/1955
Call number: photCL SCE 02 - 43528
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 - Photo taken shortly after break-through of diversion ditch seepage into tailrace to south of Powerhouse.
photCL SCE 02 - 43932
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
Visual Materials
Portal Powerhouse - construction with 440 cfs. diversion from Ward Tunnel.
photCL SCE 02 - 43761
Portal Powerhouse
Visual Materials
Portal Powerhouse - Ward tunnel diversion from Powerhouse construction.
photCL SCE 02 - 43594
Portal Powerhouse
Visual Materials
Portal Powerhouse - View of tunnel diversion during test flow of 490 cfs. Flow in diversion ditch from 12' pipe to junction with Rancheria Creek channel.
photCL SCE 02 - 43297
Portal Powerhouse
Visual Materials
Portal Powerhouse - Powerhouse before start of tunnel diversion from Florence Lake after outage of Oct. 18.
photCL SCE 02 - 43802