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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Enlarging Potter Creek channel to handle tunnel flow during excavation of tail race channel.
Type: Visual Materials(Opens in new tab)
Date: 7/15/1955
Call number: photCL SCE 02 - 43302
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 - Diverting tunnel flow from Rancheria Creek channel across main channel and into Potter Creek channel.
photCL SCE 02 - 43308
Portal Powerhouse
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Portal Powerhouse - Starting to fill Potter Creek temporary diversion channel after returning tunnel flow to permanent tailrace.
photCL SCE 02 - 43686
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Portal Powerhouse - Tailrace channel from highway bridge. Approx. 1850 cfs flow from Ward Tunnel and Rancheria Creek.
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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.
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Portal Powerhouse - Channel below powerhouse structure, flow approx. 1800 cfs thru Ward Tunnel.
photCL SCE 02 - 43922
Portal Powerhouse
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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