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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Tailrace channel excavation progress in section isolated by diverting tunnel discharge in Potter Creek Channel.
Type: Visual Materials(Opens in new tab)
Date: 8/15/1955
Call number: photCL SCE 02 - 43545
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 - View from highway bridge showing excavation progress in tailrace channel section isolated by diverting flow into Potter Creek Tunnel.
photCL SCE 02 - 43562
Portal Powerhouse
Visual Materials
Portal Powerhouse - Diverting tunnel flow from Rancheria Creek channel across main channel and into Potter Creek channel.
photCL SCE 02 - 43308
Portal Powerhouse
Visual Materials
Portal Powerhouse - Starting to fill Potter Creek temporary diversion channel after returning tunnel flow to permanent tailrace.
photCL SCE 02 - 43686
Portal Powerhouse
Visual Materials
Portal Powerhouse - Enlarging Potter Creek channel to handle tunnel flow during excavation of tail race channel.
photCL SCE 02 - 43302
Portal Powerhouse
Visual Materials
Portal Powerhouse - Leveling of spoil area over old Potter Creek channel. Note forest litter spread along north bank of tailrace channel.
photCL SCE 02 - 43896
Portal Powerhouse
Visual Materials
Portal Powerhouse - Record photo of appearance of tailrace channel immediately downstream from powerhouse prior to excavation for tailrace weir.
photCL SCE 02 - 44821