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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Starting to fill Potter Creek temporary diversion channel after returning tunnel flow to permanent tailrace.
Type: Visual Materials(Opens in new tab)
Date: 8/23/1955
Call number: photCL SCE 02 - 43686
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
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Portal Powerhouse - 400 cfs flow from side channel spillway entering tailrace from new diversion.
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Portal Powerhouse - Progress picture showing lower end of Potter Creek diversion returning to main channel just upstream from highway bridge.
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Portal Powerhouse - Diverting tunnel flow from Rancheria Creek channel across main channel and into Potter Creek channel.
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Portal Powerhouse - Record pictures of tailrace channel during outage: Upper end of channel and lower end of tunnel diversion channel used during 1955.
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Portal Powerhouse - Enlarging Potter Creek channel to handle tunnel flow during excavation of tail race channel.
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Portal Powerhouse - Tailrace channel from highway bridge. Approx. 1850 cfs flow from Ward Tunnel and Rancheria Creek.
photCL SCE 02 - 44564