Portal Powerhouse

Description: Portal Powerhouse - Lowering grade in diversion channel lower Rancheria Creek section
Type: Visual Materials(Opens in new tab)
Date: 8/8/1955
Call number: photCL SCE 02 - 43540
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 - Test flow of 490 c.f.s. through the enlarged Rancheria Creek channel.
photCL SCE 02 - 43301
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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 - excavating tailrace channel to final grade in section up-stream from Highway Bridge.
photCL SCE 02 - 43689
Portal Powerhouse
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Portal Powerhouse - Potter Creek channel used as temporary diversion. View from Hwy Bridge looking upstream.
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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