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Visual Materials

Portal Powerhouse - Progress picture

Description: Portal Powerhouse - Progress picture - Excavation in diversion channel to Rancheria Creek.
Type: Visual Materials(Opens in new tab)
Date: 7/2/1955
Call number: photCL SCE 02 - 43273
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 - Lowering grade in diversion channel lower Rancheria Creek section
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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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